EP1828063A1 - Traitement de boues d'epuration - Google Patents
Traitement de boues d'epurationInfo
- Publication number
- EP1828063A1 EP1828063A1 EP05843396A EP05843396A EP1828063A1 EP 1828063 A1 EP1828063 A1 EP 1828063A1 EP 05843396 A EP05843396 A EP 05843396A EP 05843396 A EP05843396 A EP 05843396A EP 1828063 A1 EP1828063 A1 EP 1828063A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sludge
- phosphorus compound
- amount
- phosphonium
- added
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000011282 treatment Methods 0.000 title claims description 23
- 239000010865 sewage Substances 0.000 title abstract description 5
- 239000010802 sludge Substances 0.000 claims abstract description 91
- 238000000034 method Methods 0.000 claims abstract description 63
- 244000052769 pathogen Species 0.000 claims abstract description 43
- 230000009467 reduction Effects 0.000 claims abstract description 26
- -1 phosphorus compound Chemical class 0.000 claims description 48
- 229910052698 phosphorus Inorganic materials 0.000 claims description 42
- 239000011574 phosphorus Substances 0.000 claims description 42
- 230000008569 process Effects 0.000 claims description 35
- 230000001717 pathogenic effect Effects 0.000 claims description 27
- 239000010801 sewage sludge Substances 0.000 claims description 22
- 230000007423 decrease Effects 0.000 claims description 20
- 241000588724 Escherichia coli Species 0.000 claims description 14
- 150000004714 phosphonium salts Chemical class 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 9
- 241000894006 Bacteria Species 0.000 claims description 8
- 230000029087 digestion Effects 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 125000003342 alkenyl group Chemical group 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 241000244206 Nematoda Species 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Natural products P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 3
- 241000607142 Salmonella Species 0.000 claims description 3
- 241000244155 Taenia Species 0.000 claims description 3
- 241000244159 Taenia saginata Species 0.000 claims description 3
- 241000700605 Viruses Species 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 244000000013 helminth Species 0.000 claims description 3
- 239000010452 phosphate Chemical group 0.000 claims description 3
- YIEDHPBKGZGLIK-UHFFFAOYSA-L tetrakis(hydroxymethyl)phosphanium;sulfate Chemical compound [O-]S([O-])(=O)=O.OC[P+](CO)(CO)CO.OC[P+](CO)(CO)CO YIEDHPBKGZGLIK-UHFFFAOYSA-L 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical group CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- 241000498253 Ancylostoma duodenale Species 0.000 claims description 2
- 241001465677 Ancylostomatoidea Species 0.000 claims description 2
- 241000244185 Ascaris lumbricoides Species 0.000 claims description 2
- 241000193755 Bacillus cereus Species 0.000 claims description 2
- 241001235572 Balantioides coli Species 0.000 claims description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical group [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims description 2
- 241000589876 Campylobacter Species 0.000 claims description 2
- 241000223935 Cryptosporidium Species 0.000 claims description 2
- 241000224431 Entamoeba Species 0.000 claims description 2
- 241000224466 Giardia Species 0.000 claims description 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical group OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 2
- 241000702670 Rotavirus Species 0.000 claims description 2
- 241000242678 Schistosoma Species 0.000 claims description 2
- 241000607768 Shigella Species 0.000 claims description 2
- 241000244177 Strongyloides stercoralis Species 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical group [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 241000244157 Taenia solium Species 0.000 claims description 2
- 241001489145 Trichuris trichiura Species 0.000 claims description 2
- 241000607479 Yersinia pestis Species 0.000 claims description 2
- 150000001450 anions Chemical group 0.000 claims description 2
- 244000309743 astrovirus Species 0.000 claims description 2
- 208000007456 balantidiasis Diseases 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 235000013601 eggs Nutrition 0.000 claims description 2
- 150000002903 organophosphorus compounds Chemical class 0.000 claims description 2
- ZYNUSOWWGMTZHH-UHFFFAOYSA-L oxalate;tetrakis(hydroxymethyl)phosphanium Chemical compound [O-]C(=O)C([O-])=O.OC[P+](CO)(CO)CO.OC[P+](CO)(CO)CO ZYNUSOWWGMTZHH-UHFFFAOYSA-L 0.000 claims description 2
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical group [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims description 2
- VELJAQNIUXJKSV-UHFFFAOYSA-M tetrakis(hydroxymethyl)phosphanium;acetate Chemical compound CC([O-])=O.OC[P+](CO)(CO)CO VELJAQNIUXJKSV-UHFFFAOYSA-M 0.000 claims description 2
- XAAGVNUUSJZVIC-UHFFFAOYSA-M tetrakis(hydroxymethyl)phosphanium;bromide Chemical compound [Br-].OC[P+](CO)(CO)CO XAAGVNUUSJZVIC-UHFFFAOYSA-M 0.000 claims description 2
- 241000701161 unidentified adenovirus Species 0.000 claims description 2
- 241000186781 Listeria Species 0.000 claims 1
- 150000001805 chlorine compounds Chemical group 0.000 claims 1
- 150000003003 phosphines Chemical class 0.000 claims 1
- FAUOSXUSCVJWAY-UHFFFAOYSA-N tetrakis(hydroxymethyl)phosphanium Chemical compound OC[P+](CO)(CO)CO FAUOSXUSCVJWAY-UHFFFAOYSA-N 0.000 claims 1
- ZTBDCHNXDHUMCJ-UHFFFAOYSA-K tetrakis(hydroxymethyl)phosphanium;phosphate Chemical compound [O-]P([O-])([O-])=O.OC[P+](CO)(CO)CO.OC[P+](CO)(CO)CO.OC[P+](CO)(CO)CO ZTBDCHNXDHUMCJ-UHFFFAOYSA-K 0.000 claims 1
- 150000003018 phosphorus compounds Chemical class 0.000 abstract 2
- 230000006378 damage Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- UUIVKBHZENILKB-UHFFFAOYSA-N 2,2-dibromo-2-cyanoacetamide Chemical compound NC(=O)C(Br)(Br)C#N UUIVKBHZENILKB-UHFFFAOYSA-N 0.000 description 5
- 230000001580 bacterial effect Effects 0.000 description 5
- 238000010790 dilution Methods 0.000 description 5
- 239000012895 dilution Substances 0.000 description 5
- 239000003139 biocide Substances 0.000 description 4
- 239000000645 desinfectant Substances 0.000 description 4
- 230000003115 biocidal effect Effects 0.000 description 3
- 239000008346 aqueous phase Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 239000008363 phosphate buffer Substances 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- OVSKIKFHRZPJSS-UHFFFAOYSA-N 2,4-D Chemical compound OC(=O)COC1=CC=C(Cl)C=C1Cl OVSKIKFHRZPJSS-UHFFFAOYSA-N 0.000 description 1
- YTVQIZRDLKWECQ-UHFFFAOYSA-N 2-benzoylcyclohexan-1-one Chemical compound C=1C=CC=CC=1C(=O)C1CCCCC1=O YTVQIZRDLKWECQ-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 241000186779 Listeria monocytogenes Species 0.000 description 1
- 241000583586 Sagina Species 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 241000869417 Trematodes Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008953 bacterial degradation Effects 0.000 description 1
- JMXMXKRNIYCNRV-UHFFFAOYSA-N bis(hydroxymethyl)phosphanylmethanol Chemical compound OCP(CO)CO JMXMXKRNIYCNRV-UHFFFAOYSA-N 0.000 description 1
- 239000006285 cell suspension Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000007793 ph indicator Substances 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-O phosphonium Chemical compound [PH4+] XYFCBTPGUUZFHI-UHFFFAOYSA-O 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/542—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Definitions
- the invention relates to a method for treating sewage sludge and sludge treated by the aforesaid process.
- the treatment of raw sewage generally involves a filtration or settling step (in which large solids and gravel are removed) followed by a step in which the aqueous phase is aerobically removed to remove biodegradable substances.
- This last step involves "activated sludge" which is essentially a concentrated bacterial mass.
- Biodegradable substances must be removed before discharging the aqueous phase into rivers, for example rivers, otherwise the bacterial degradation of these substances in the river would consume dissolved oxygen, leading to the death of fish, to bad water. odors and the general degradation of the environment.
- growth and multiplication of bacteria occur, which results in the accumulation of bacterial sludge that must be removed.
- the excess sludge can be "digested” under anaerobic conditions where, essentially, the bacteria are rebalanced under the new conditions to produce methane and reduce the biomass but, in the end, there remains an irreducible mass of excess of sludge that must be removed.
- disposal methods such as controlled discharge and rejection at sea, none of which are favored for pollution reasons.
- excess sludge may be incinerated (expensive) or spread on farmland, and in the latter case sludge may be used as fertilizer / soil conditioner, which is a benefit.
- E. coli An indicator organism used to quantify pathogenic risk is E. coli.
- E. coli To meet the statutory requirements of the United Kingdom for conventional treated sludge, the level of E. coli in sludge must be reduced by 99% (ie a log reduction of 2) and the maximum acceptable level E. coli in the treated sewage sludge is 10 5 per gram of dry sludge (gbs).
- Salmonella For improved treated sludge in the United Kingdom, Salmonella should not be present and the level of E.
- E. coli should be reduced by at least 99.9999% (ie logarithmic drop of 6).
- the maximum acceptable level of E. coli in the improved treated sewage sludge is 10 3 per gram of dry sludge. It is expected that similar statutory requirements will be adopted in the future throughout Europe and the USA.
- the present invention provides a process for treating sewage sludge to reduce the pathogen content of said sludge, the process comprising the steps of:
- the phosphorus compound may be added to untreated (raw) sewage sludge.
- the phosphorus compound is preferably added in an amount sufficient to reduce the total amount of pathogens in the untreated sewage sludge by an amount equivalent to a log reduction of 2 or more.
- the phosphorus compound may be added to sewage sludge which have already been subjected to one or more treatments to reduce the total amount of pathogens present, these sludge are called in the following "pre-treated sludge".
- pre-treated sludge A preferred treatment used to generate pre-treated sludge is anaerobic digestion.
- the phosphorus compound is preferably added to the pretreated sludge in an amount effective to reduce the amount of pathogen present in the pretreated sludge so that the total decrease in pathogen content, after pretreatment and treatment with the phosphorus compound, compared to sludge. untreated, equivalent to a log reduction of 2 or more.
- the phosphorus compound is maintained in contact with the pretreated sludge for a time sufficient to cause a total decrease in pathogen content, relative to the untreated sludge, by an amount equivalent to a log reduction of 2 or more; and the total decrease in pathogen content achieved by adding the phosphorus compound is an amount equivalent to a log reduction of less than 2.
- untreated sewage sludge may have been subjected to an anaerobic digestion treatment prior to step (a).
- the anaerobic digestion step could, for example, cause a decrease in the pathogen content by an amount equivalent to a log reduction of 1.0 to 1.8, preferably 1.5.
- the untreated sludge after treatment with an anaerobic digestion step could be called pre-treated sludge.
- a phosphorus compound could then be added to the pretreated sludge to further lower the pathogen content.
- the phosphorus compound could cause a further decrease in pathogen content by an amount equivalent to a log reduction of 0.2 to 1.0 or more, preferably 0.5 or more, respectively, relative to the pathogen content.
- untreated sludge This process could lead to a decrease total pathogen content of sludge by an amount equivalent to a log reduction of 2 or more compared to the pathogen content of untreated sludge, to give finally treated sludge.
- the method according to the present invention provides a decrease in pathogen content by an amount equivalent to a log reduction of two to six of the pathogen content present in the finally treated sludge after a treatment with the process of the present invention. the present invention compared to the pathogen content of untreated sludge.
- the phosphorus compound is kept in contact with the sludge for a time sufficient to reduce the total amount of pathogens present in the sludge, compared to untreated raw sludge, by a log reduction of 3 or more and more preferably by 4. or more .
- the phosphorus compound is an organophosphorus compound.
- the phosphorus compound is a phosphonium compound, especially a tetrakis (hydroxy-organo) phosphonium salt or a compound of formula (I)
- R 'and R " which may be the same or different, are selected from an alkyl, hydroxyalkyl, alkenyl or aryl group, and X is an anion.
- R 'and R " are preferably from 1 to 20 carbon atoms in length.
- X is preferably selected from the group consisting of chloride, sulfate, phosphate, acetate, oxalate and bromide.
- the phosphonium compound is tetrakis (hydroxymethyl) phosphonium sulfate.
- the phosphonium compound may be, for example, tetrakis (hydroxymethyl) phosphonium chloride, tetrakis (hydroxymethyl) phosphonium bromide, tetrakis phosphate (hydroxyethyl) methyl) phosphonium, tetrakis (hydroxymethyl) phosphonium acetate or tetrakis (hydroxymethyl) phosphonium oxalate.
- the phosphorus compound may be a phosphine bearing an alkyl substituent, for example tris (hydroxymethyl) phosphine such as that represented by the formula (II):
- each of R which may be the same or different, is selected from alkyl, hydroxyalkyl, alkenyl or aryl.
- the amount of phosphorus compound to be added to the sludge in step (a) of the process of the present invention is preferably up to 10,000 mg / l, preferably from 100-2,500 mg / l, and more preferably from 200 to 200 mg / l. 1000 mg / 1.
- the amount of phosphorus compound to add to the sludge can be expressed in relation to the weight of the dry extract.
- the amount to be added can reach about 30% by weight of the dry extract.
- the amount of phosphorus compound to be added may be from 0.1 to 20%, for example from 0.1 to 10%, such as from 0.2 to 5% or from 0.4 to 2% by weight. of the dry extract.
- Step (b) of the process of the present invention can be carried out over a period of 1 second to 14 days. For example, 6 to 24 hours, 1 to 6 hours, 1 to 60 minutes, 1 to 60 seconds or 1 to 15 seconds.
- the log reduction of the total pathogen content can be measured on the basis of liquid sludge so that the finally treated sludge obtained after treatment by the process of the present invention shows a decrease in the total level of pathogens of a quantity. equivalent to a log reduction of 2 or more.
- the expression slurries is defined herein as containing a solids content of 1 to 4% by weight.
- the total decrease in pathogen content equivalent to a log reduction of 2 or more that is achieved by the method of the present invention is achieved in a period of time which is shorter than the amount of time it if no phosphorus compound is used.
- the total decrease in pathogen content equivalent to a log reduction of 2 or more that is achieved by the method of the present invention is preferably achieved within 20 to 30 hours, more preferably in the range of 20 to 30 hours. 24 hours space.
- the log reduction of the total pathogen content can be measured relative to the sludge cake so that the finally treated sludge obtained after the treatment by the method of the present invention shows a decrease in the total level of pathogens.
- a sludge cake is defined herein as containing a solids content of 20 to 30% by weight.
- the total decrease in pathogen content equivalent to a log reduction of 2 or more achieved by the method of the present invention is achieved in a period of time which is shorter than the amount of time required. if no phosphorus compound is used.
- the present process thus ensures that, regardless of whether the treated sludge is used in liquid or cake form, the necessary decrease in pathogen levels is achieved to allow the treated sludge to be employed as required.
- step (b) preferably lasts 6 to 24 hours.
- step (b) is preferably carried out in 15 seconds 24 hours .
- Dewatering additives such as polydiallyldimethylammonium chlorides, polyamines, cationized polyacrylamides and anionic polyacrylamides can be employed in the production of a sludge cake.
- bacteria including Escherichia coli, Salmonella, Shigella, Vibreo cholerae, Bacillus cereus, Listeria monocytogenes, Campylobacter and Yersinia pestis;
- viruses including rotaviruses, calciviruses, group F adenoviruses and astroviruses;
- helminths and their eggs including nematodes, eg Ascaris lumbricoides (roundworms), Trichuris trichiura (whipworm), Ancylostoma duodenale (hookworm), Strongyloides stercoralis (eelwort); trematodes, for example, Schistosoma species; and cestodes, for example Taenia sagina ta (beef tapeworm) and Taenia solum (pork tapeworm).
- nematodes eg Ascaris lumbricoides (roundworms), Trichuris trichiura (whipworm), Ancylostoma duodenale (hookworm), Strongyloides stercoralis (eelwort); trematodes, for example, Schistosoma species; and cestodes, for example Taenia sagina ta (beef tapeworm) and Taenia solum (pork tapeworm).
- the present invention further provides sewage sludge which has been treated according to the method described above.
- the sludge may be liquid sludge or may be a sludge cake.
- the present invention will be illustrated by means of the following examples.
- the phosphorus compound used to treat the sewage sludge was 75% by weight of tetrakis (hydroxymethyl) phosphonium sulfate, available from Rhodia Consumer Specialties Limited.
- the product will be referred to hereinafter as "phosphonium salt”.
- sewage sludge was treated with a conventional disinfectant compound, dibromonitrilopropionamide (DBNPA).
- DBNPA dibromonitrilopropionamide
- the methodology used to evaluate the biocidal performance was the quantitative suspension test (ESQ) using sterile anaerobic digester sludge as an ESQ medium, inoculated back with cultures of E. coli previously isolated from the sludge. In this way, a coherent chemical environment (sterile sludge) could be used in conjunction with a defined bacterial challenge. This makes it possible to obtain coherence between the tests.
- ESQ quantitative suspension test
- Sterile sludge was prepared from raw sludge samples by autoclaving at 121 ° C for 20 minutes.
- the E. coli strains used in the ESQ were isolated from raw sludge samples.
- the ESQ was conducted as follows:
- Fresh titrated solutions of the processed process chemicals were prepared in sterile phosphate buffer (0.2M at pH 7.2) at concentrations such that, by adding 0.5ml to the ESQ medium (final volume of 20%), ml), the desired final concentration of biocide is obtained.
- the ESQ medium was well mixed and kept at 22 ° C. for the duration of the test.
- MacConkey Broth was chosen because this medium contains the purple bromcresol pH indicator that turns purple to yellow as the medium becomes acidic. It is a useful indirect indicator of microbial growth (organic acid production) when it can not be evaluated by the appearance of a disorder in a clear environment at the origin. Since the sludge contains solids in suspension, the first 2 tubes of the dilutions series show an instantaneous cloudiness as soon as sludge is added. This makes it impossible to use a single disorder as an indicator of microbial growth.
- the biocides used in the evaluations are shown in the following table.
- the performance of the phosphonium salt was studied at an equal active substance concentration of 375 mg / l and 500 mg / l.
- a logarithmic reduction of 3 in the number of E. coli was obtained after just over 1 minute of contact between raw untreated sewage sludge and phosphonium salt at a concentration of 500 mg / l and only after less than two minutes of contact between raw untreated sewage sludge and phosphonium salt at a concentration of 375 mg / 1.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0427740A GB2421239B (en) | 2004-12-20 | 2004-12-20 | Treatment of sewage sludge |
| PCT/EP2005/013821 WO2006066903A1 (fr) | 2004-12-20 | 2005-12-16 | Traitement de boues d'epuration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1828063A1 true EP1828063A1 (fr) | 2007-09-05 |
Family
ID=34090279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05843396A Withdrawn EP1828063A1 (fr) | 2004-12-20 | 2005-12-16 | Traitement de boues d'epuration |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US7740762B2 (fr) |
| EP (1) | EP1828063A1 (fr) |
| JP (1) | JP4937926B2 (fr) |
| CN (2) | CN101084164A (fr) |
| AU (1) | AU2005318398B2 (fr) |
| CA (1) | CA2591290C (fr) |
| GB (1) | GB2421239B (fr) |
| RU (1) | RU2397150C2 (fr) |
| WO (1) | WO2006066903A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2647852A1 (fr) | 1989-06-01 | 1990-12-07 | Michelin & Cie | Pompe volumetrique pour matiere pateuse |
| CN103648988B (zh) * | 2011-03-16 | 2016-01-20 | 索尔维投资有限公司 | 用于污水生物处理的方法 |
| CN109251880B (zh) * | 2018-11-26 | 2020-05-15 | 深圳中绿环境集团有限公司 | 一种蜡样芽胞杆菌及其在改善水体磷污染中的应用 |
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| US673509A (en) * | 1900-12-26 | 1901-05-07 | John A Staples | Spring-edge seat. |
| DE1280764B (de) * | 1967-07-21 | 1968-10-17 | Hoechst Ag | Verfahren zum Vermindern der UEberschussschlammproduktion in Belebtschlammanlagen fuer Abwasserreinigung |
| US4509696A (en) | 1982-08-30 | 1985-04-09 | Chemfix Technologies, Inc. | Method for treating liquid and semi-solid organic waste materials |
| DE3469162D1 (en) * | 1983-08-26 | 1988-03-10 | Albright & Wilson | Biocidal water treatment |
| DE3674308D1 (de) * | 1985-08-06 | 1990-10-25 | Albright & Wilson | Biozide zusammensetzungund verfahren zur behandlung von wasser. |
| JPS62168599A (ja) * | 1986-01-20 | 1987-07-24 | Kurita Water Ind Ltd | 有機性汚泥の濃縮方法 |
| JPS62216700A (ja) * | 1986-03-18 | 1987-09-24 | Kurita Water Ind Ltd | 有機性汚泥の濃縮方法 |
| JPS6397299A (ja) * | 1986-10-13 | 1988-04-27 | Ebara Infilco Co Ltd | 有機性汚泥の嫌気性消化方法 |
| GB8712372D0 (en) * | 1987-05-26 | 1987-07-01 | Albright & Wilson | Treating ponds aquaria & watercourses |
| DE3816989A1 (de) * | 1987-08-05 | 1989-02-16 | Peroxid Chemie Gmbh | Entseuchung von klaerschlamm |
| US4966716A (en) * | 1988-06-24 | 1990-10-30 | Great Lakes Chemical Corporation | Method for the control of biofouling in recirculating water systems |
| GB8901881D0 (en) * | 1989-01-27 | 1989-03-15 | Albright & Wilson | Biocidal compositions and treatments |
| GB8904844D0 (en) * | 1989-03-03 | 1989-04-12 | Albright & Wilson | Biocidal compositions and treatments |
| US5188741A (en) * | 1992-04-01 | 1993-02-23 | Texaco Inc. | Treatment of sewage sludge |
| US5422015A (en) * | 1992-07-30 | 1995-06-06 | Hondo Chemical, Inc. | Pathogenic waste treatment |
| EP0650931B1 (fr) * | 1993-10-22 | 2003-07-02 | Kurita Water Industries Ltd. | Méthode pour éviter à une boue activée de pendre sa capacité de sedimentation |
| US5599461A (en) * | 1994-11-18 | 1997-02-04 | Peltier, Jr.; Morris | Process and product produced thereby for disinfection and agricultural reuse of organic sludges |
| FI961247A0 (fi) * | 1996-03-18 | 1996-03-18 | Finnish Peroxides Ab Oy | Foerfarande foer loesning av uppsvaellningsproblem i en avfalls vattenreningsanordning foer kontroll av traodartiga bakterier |
| US5670055A (en) * | 1996-08-08 | 1997-09-23 | Nalco Chemical Company | Use of the linear alkylbenzene sulfonate as a biofouling control agent |
| JP4250676B2 (ja) * | 1998-02-04 | 2009-04-08 | 株式会社片山化学工業研究所 | 工業用殺菌剤および工業的殺菌方法 |
| JP2000026180A (ja) * | 1998-07-07 | 2000-01-25 | Asano Koji Kk | 有機性汚泥の堆肥化方法 |
| US6001158A (en) * | 1999-02-18 | 1999-12-14 | Baker Hughes Incorporated | Dry biocide |
| GB0001417D0 (en) * | 2000-01-22 | 2000-03-08 | Albright & Wilson Uk Ltd | Bleaching pulp |
| JP2002102891A (ja) * | 2000-10-02 | 2002-04-09 | Nippon Chem Ind Co Ltd | 汚泥および脱水ケーキの悪臭防止方法 |
| JP3736344B2 (ja) * | 2000-12-22 | 2006-01-18 | 栗田工業株式会社 | 汚泥脱水ケーキの臭気発生防止方法 |
| JP2002219494A (ja) * | 2001-01-23 | 2002-08-06 | Mitsubishi Gas Chem Co Inc | 消臭剤及び消臭方法 |
| JP4733851B2 (ja) * | 2001-04-11 | 2011-07-27 | アクアス株式会社 | アメーバ殺滅剤、アメーバの抑制方法及びレジオネラ属菌の除菌方法 |
| WO2003021031A1 (fr) * | 2001-09-01 | 2003-03-13 | Rhodia Consumer Specialties Limited | Composes phosphores |
| JP4193106B2 (ja) * | 2002-05-02 | 2008-12-10 | 栗田工業株式会社 | 汚泥脱水ケーキの臭気抑制方法及び臭気抑制剤 |
| NZ540823A (en) * | 2002-12-20 | 2008-03-28 | Lonza Ag | Method for removal of biofilm |
| JP5280602B2 (ja) * | 2003-01-30 | 2013-09-04 | 水ing株式会社 | 臭気発生防止方法 |
| SE525083C2 (sv) * | 2003-04-23 | 2004-11-23 | Kemira Kemi Ab | Sätt att behandla rötslam |
| GB0314363D0 (en) * | 2003-06-20 | 2003-07-23 | Thames Water Utilities | Treatment of sewage sludge |
-
2004
- 2004-12-20 GB GB0427740A patent/GB2421239B/en not_active Expired - Fee Related
-
2005
- 2005-12-16 EP EP05843396A patent/EP1828063A1/fr not_active Withdrawn
- 2005-12-16 CN CNA2005800437489A patent/CN101084164A/zh active Pending
- 2005-12-16 CN CN201410305515.2A patent/CN104086061A/zh active Pending
- 2005-12-16 CA CA 2591290 patent/CA2591290C/fr not_active Expired - Fee Related
- 2005-12-16 US US11/793,303 patent/US7740762B2/en not_active Expired - Fee Related
- 2005-12-16 WO PCT/EP2005/013821 patent/WO2006066903A1/fr not_active Ceased
- 2005-12-16 JP JP2007545981A patent/JP4937926B2/ja not_active Expired - Fee Related
- 2005-12-16 AU AU2005318398A patent/AU2005318398B2/en not_active Ceased
- 2005-12-16 RU RU2007127726A patent/RU2397150C2/ru not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006066903A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006066903A1 (fr) | 2006-06-29 |
| CN101084164A (zh) | 2007-12-05 |
| AU2005318398A1 (en) | 2006-06-29 |
| US20080257001A1 (en) | 2008-10-23 |
| AU2005318398B2 (en) | 2009-11-19 |
| RU2007127726A (ru) | 2009-01-27 |
| CA2591290A1 (fr) | 2006-06-29 |
| JP2008523970A (ja) | 2008-07-10 |
| CA2591290C (fr) | 2012-03-13 |
| GB0427740D0 (en) | 2005-01-19 |
| GB2421239A (en) | 2006-06-21 |
| CN104086061A (zh) | 2014-10-08 |
| RU2397150C2 (ru) | 2010-08-20 |
| GB2421239B (en) | 2010-06-23 |
| JP4937926B2 (ja) | 2012-05-23 |
| US7740762B2 (en) | 2010-06-22 |
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