JPH1015596A - Chemical sludge treatment method and treatment substance therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the purifying treatment of sludge such as excretion and to regenerate the sludge to reutilize the same as a soil modifier by chemically reacting quick lime with org. or inorg. sludge on the way of the collection and feeding process thereof and ageing the chemically reacted treated sludge to subject the sludge such as excretion to purifying treatment. SOLUTION: Sludge 2 to be treated such as excretion/feces sludge 2a, sewage/ drain sludge 2b, rivers/lakes and marshes sludge 2c or civil engineering construction sludges 2d are housed in a housing vehicle to be transported. Next, treated sludge 2 is supplied to a treated sludge receiving hopper 40 by the supply machine 3 provided to the lower part of a treated sludge storage case 4 and a quick lime reaction 5 in the hopper 30 of the treated matter supply device 6 is supplied to a treated sludge receiving hopper 40 in the ratio set so as to be adjusted to the supply amt. of the treated sludge 2 by a quantitative supply machines 31. Subsequently, the deodorizing of treated sludge averagely charged in tank 45 and the propagation of harmful bacteria is suppressed and the treated sludge is tanken out to a yard 8 and ageing is performed by turning the sludge at a predetermined interval to reutilize the sludge as a soil modifier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to sludge treatment, and more particularly, to a method for chemically treating sludge from sewage, drainage, rivers, and the like, and a treated substance thereof.

[0002]

2. Description of the Related Art As a conventional sludge treatment method, there is a method disclosed in, for example, JP-A-2-265885 (water quality improvement treatment method and its treatment substance). This conventional method,
The main component is a processed substance obtained by purifying and processing natural mineral fossils mainly containing calcium carbonate and carbon dioxide into fine powders. The treated substance is dispersed and mixed in treated water for improving water quality, and the physics of adsorption and ion exchange Is a treatment method for improving water quality characterized by simultaneously promoting coagulation and chemical action and rapidly performing coagulation and sedimentation, and contains various nekton, plankton, algae, and seaweed components composed of calcareous and silicic acid. Natural shell fossils are crushed into small grains or coarse sandy ore, dried naturally, and dried at 120 ° C to 450 ° C.
It is an object of the present invention to provide a treated substance for improving water quality, characterized in that the treated substance is purified by drying it with hot air to about ° C to obtain powder and granules, further classifying it by air, and purifying to a particle size of about 0.10 µm to about 50.00 µm.

[0003] That is, the conventional sludge treatment method is mainly a water quality improvement method, and is characterized by using a natural shell fossil purified and processed into a powder as a treatment substance.
In particular, the component characteristic of the treated substance is water (H ₂ O) 1.05.
%, Total amount of silicic acid (SiO ₂ ) 18.24%, total amount of magnesia (NgO) 0.80%, total amount of lime (CaO) 40.14
%, Loss on ignition 32.66%, iron oxide (Fe203)
What consists of 55% and oxidation (AI203) 0.90% is used.

[0004]

There is a problem to be solved by the present invention in that sludge is chemically treated by a quick lime reaction without using such a conventional method.

[0005]

According to the present invention, there is provided a method comprising:
It was developed to solve the problem
Collects organic and inorganic sludge from water, rivers, etc.
A first treatment step of transporting the treated sludge with quicklime;
A second processing step of performing a chemical reaction, and a processing step of performing the chemical reaction.
And a third treatment step for thermally producing the sludge.
The provision of a chemical sludge treatment method characterized by the following:
In the treatment method, sewage, drainage, rivers, etc.
To regenerate organic and inorganic sludge at the generation site
Process, and the treatment obtained by the above-mentioned sludge treatment method
The component characteristics of sludge are as follows: 8.97% moisture, total nitrogen (N)
3.62%, total phosphoric acid (P_TwoO_Five) 1.84%, Kari
Total amount (K_TwoO) 0.21%, calcium carbonate (CaCO
_Three) 39.37%, PH 12.1, mercury (Hg) 0.1
8 mg, arsenic (As) 9.6 mg, cadmium (Cd)
0.88 mg in a chemical sludge treatment method.
Furthermore, the reactant component of the treated sludge has a water content of 17.09%,
1.88% of total nitrogen (N), total of phosphoric acid (P_TwoO _Five)
1.96%, Kari total amount (K_TwoO) 2.05%, calcium carbonate
Shim (CaCO_Three) 24.97%, PH 8.8 mercury (H
g) Less than 0.01 mg, arsenic (As) 0.3 mg, cad
Sludge treatment substance consisting of 0.24 mg of Cd
In the offer.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

(1) a first treatment step of collecting and transporting organic and inorganic sludge generated from sewage, drainage, rivers, and the like, a second treatment step of chemically reacting the treated sludge with quick lime, and treating the treated sludge by the chemical reaction. Since it is a chemical sludge treatment method composed of a third treatment step of thermoforming, it can be said to be a simpler and superior treatment method than a treatment method using conventional shell fossil products.

(2) In the above-mentioned treatment method, organic and inorganic sludge generated from sewage, drainage, rivers, etc. is regenerated at the generation site, so that it can be treated immediately and at low cost.

(3) The component characteristics of the treated sludge obtained by the above-mentioned sludge treatment method are as follows: moisture: 8.97%; total amount of nitrogen (N): 3.62
%, Total amount of phosphoric acid (P ₂ O ₅ ) 1.84%, total amount of potassium (K
₂ O) 0.21%, calcium carbonate (CaCO ₃ ) 3
9.37%, PH 12.1, Mercury (Hg) 0.18m
g, 9.6 mg of arsenic (As) and cadmium (Cd)
Since it is a chemical sludge treatment method comprising 0.88 mg, component characteristics for promoting the growth of agricultural products can be obtained.

(4) The reactant component of the treated sludge is water 1
7.09%, total nitrogen (N) 1.88%, total phosphoric acid (P ₂ O ₅ ) 1.96%, total potassium (K ₂ O) 2.05
%, Calcium carbonate (CaCO ₃ ) 24.97%, PH
8.8, mercury (Hg) less than 0.01 mg, arsenic (As)
Since it is a sludge treatment substance consisting of 0.3 mg and cadmium (Cd) 0.24 mg, it can be reused as a special fertilizer by quick lime reaction, and fertilizer containing a large amount of alkali is fertilized for a long period of time. In this way, it can be effectively used for agricultural soil.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described with reference to a flow sheet diagram of a chemical sludge treatment method shown in FIG.

Raw materials for processing (processed sludge) a. Sludge from human waste, animals, livestock, and other human and manure sludges, sewage and factory drainage sludge discharged from households, factories, etc. c. Contaminated rivers, lake water, etc. generally sludge product d, road construction, construction sludge was discharged by civil engineering work such as process first step: sewage, drainage, collecting conveying the treated sludge of organic and inorganic generated from rivers. Second step: The treated sludge is chemically reacted with quicklime. Third step: The treated sludge that has undergone the chemical reaction is aged.

Processing substance component (reactant component)

[0013]

[Table 1] Reprocessing component (recycled sludge properties)

[0014]

[Table 2] Next, the chemical sludge treatment method of the present invention will be described with reference to the flow sheet diagram shown in FIG.

The sludge treatment mechanism 1 of the present invention temporarily stores treated sludge 2 such as night soil and manure sludge 2a, sewage / drainage sludge 2b, river / lake sludge 2c, and civil engineering mud 2d. A treated sludge storage 4 having a feeder 3 for supplying quantitatively, a treated feeder 6 for temporarily storing the quicklime reaction 5 and supplying quantitatively in accordance with the supply amount of the feeder 3; Mixing tank 7 for treating sludge 2 and quicklime reaction 5
And an aging section having a yard 8 and a turning machine 9 for leaving the mixed waste 2A discharged from the mixing tank 7 for a predetermined time.
This is a method for processing by a processing system consisting of 10.

The treated sludge 2 is not limited to the illustrated one, but must be capable of causing various reactions by adding and mixing the quicklime reaction 5. Further, since the quick lime reaction 5 to the treated sludge 2 changes depending on the properties of the treated sludge 2, it is basically necessary to finally determine it by conducting a test or the like. For reference, an example of the amount of the quicklime reaction 5 added to the various types of treated sludge 2 is shown below. Night soil and manure sludge : 15 kg of quicklime is added to 1 t of sludge having a water content of 85% by weight. Sewage and drainage sludge : 15 to 30 kg of quicklime is added to 10 tons of sludge having a water content of 93% by weight (± 2%). River / lake sludge : 60 kg of quicklime is added to 10 t of sludge having a water content of 93% by weight (± 2%). Civil works mud : 100 to 150 kg of quicklime is added to 10 tons of sludge having a water content of 60% by weight.

The treated sludge storage 4 is constructed by mounting a feeder 3 below the hopper 20, and temporarily stores the treated sludge 2 in the hopper 20 and stably feeds the treated sludge 2 to the feeder 3. , To prevent an error from occurring in the supply amount of the supply device 3. The feeder 3 is of a screw type, but is not particularly limited thereto.
Any variable can be used as long as it can be supplied quantitatively. In this embodiment, the supply amount of the treated sludge 2 is varied by changing the rotation speed of the screw.

The processing material feeder 6 has a fixed feeder 31 mounted below the hopper 30.
A screw type or a table type is used as the material 31, but it is not limited to this, and the quick lime reaction 5 can be varied and supplied quantitatively at a ratio set according to the supply amount of the treated sludge 2. Anything may be used as long as it is provided.

The mixing tank 7 is provided with a processing sludge receiving hopper 40 for temporarily receiving the processing sludge 2 supplied from the processing sludge storage 4 and the processing substance 5 supplied from the processing material feeder 6.
have. A treated sludge input device 41 is provided below the treated sludge receiving hopper 40, and screws 42 and 43 in opposite directions are fixed to the same shaft 44 in the treated sludge input device 41. Are rotated in the same direction, thereby transporting the sludge composed of the treated sludge 2 and the quicklime reaction 5 to the left and right, and is charged into the tank 45 through a supply hole (not shown) on average. This tank 45 is provided with two stirrers 48 each having a shaft 46 provided with a plurality of four blade stirring blades 47. These two stirrers 48 are provided in the tank 45 so that the stirring blades 47 are staggered. The two agitators 48 are rotated by a motor (not shown) with a variable speed reducer. Accordingly, the sludge that has been averagely injected into the tank 45 by the treated sludge input device 41 stays in the tank 45 for a predetermined time, for example, about 7 to 15 minutes, and the two agitators 48.
And various chemical reactions take place in the process to deodorize and suppress the growth of harmful bacteria. The treated sludge 2A after the mixing treatment in the mixing tank 7 is
It is dropped onto a conveyor 50 from a gate (not shown) provided at the lower part of the mixing tank 7 and sent to the aging section 10 by the conveyor 50. The aging section 10 leaves the treated sludge 2A after the reaction in the yard 8 for a predetermined time, for example, about 2 days to 2 weeks, during which time at least one turnover is performed by the turnover machine 9 to maintain the aerobic atmosphere. Culture aerobic bacteria,
It reduces the molecular weight of the organic component of the treated sludge 2A and kills harmful bacteria. Yard 8 is made of concrete,
In the case of outdoor installation, a roof will be provided to prevent the effects of wind and rain. The type of the turning machine 9 is not limited as long as it can turn the treated sludge 2A after the mixing treatment left on the yard 8.

In addition to the processing steps of the present embodiment, a method of directly processing the work site is also possible. Next, the chemical sludge treatment method of the present invention will be described.

[0021] Treated sludge 2 such as night soil and manure sludge 2a, sewage / drainage sludge 2b, river / lake sludge 2c, and civil engineering mud 2d are collected by a collection vehicle and transported to a stock yard or the like for storage. Immediately, the sludge is put into the hopper 20 of the treated sludge storage 4 by a transporting means such as a conveyor and stored. hopper
A predetermined amount of the treated sludge 2 is supplied to a treated sludge receiving hopper 40 of the mixing tank 7 by a feeder 3 provided at a lower portion of 20. On the other hand, the quicklime reaction 5 contained in a container or the like is put into the hopper 30 of the processing material feeder 6, and the quicklime reaction 5 is supplied to the processing sludge receiving hopper by the quantitative feeder 31 at a ratio set according to the supply amount of the processing sludge 2. Supply 40. Further, the sludge is put into the tank 45 on average by the treated sludge input device 41 below the treated sludge receiving hopper 40. In this charging process, the sludge is stirred and retained by the two stirrers 48 for about 7 to 15 minutes to cause adsorption and chemical reaction, thereby suppressing deodorization and suppressing the growth of harmful bacteria. After this tank
Take out the treated sludge 2A after mixing from 45, and take it to a conveyor
At 50, the sludge is transported to the yard 8, leveled by the turning machine 9, and the sludge is turned at a predetermined interval for aging. Aged sludge, that is, reclaimed treated sludge, can be used effectively for the production of organic vegetables by reusing it as a soil conditioner, and can also be used effectively at construction sites by using it as a soil conditioner. can do.

[0022]

The sludge treatment method of the present invention can be applied to sewage, drainage,
A first treatment step of collecting and transporting organic and inorganic sludge generated from rivers and the like, a second treatment step of chemically reacting the treated sludge with quicklime, and a third treatment step of thermally forming the chemically reacted treated sludge And a chemical sludge treatment method characterized by comprising: a method for regenerating organic and inorganic sludge generated from sewage, drainage, rivers, etc. at the generation site in the above-mentioned treatment method. . Further, the component characteristics of the treated sludge obtained by the above-mentioned sludge treatment method are as follows: moisture: 8.97%, total amount of nitrogen (N): 3.62%, total amount of phosphoric acid (P ₂ O ₅ ): 1.84%, total amount of potassium (K ₂₎ O)
0.21%, calcium carbonate (CaCO ₃ ) 39.37
%, PH 12.1, mercury (Hg) 0.18 mg, arsenic (As) 9.6 mg, and cadmium (Cd) 0.88 m
g) in the chemical sludge treatment method. Further, the reactant component of the treated sludge has a water content of 17.09%, a total amount of nitrogen (N) of 1.88%, and a total amount of phosphoric acid (P ₂ O ₅ ) of 1.96.
%, Total amount of potassium (K ₂ O) 2.05%, calcium carbonate (C
aCO ₃ ) 24.97%, PH 8.8, mercury (Hg)
The use of a sludge treatment material consisting of less than 0.01 mg, arsenic (As) 0.3 mg, and cadmium (Cd) 0.24 mg has the following effects. A. Since sludge from human waste, animal, livestock, and other human excrement and manure can be purified, the sludge can be regenerated and reused as a soil conditioner or soil conditioner. (A) It can purify sewage and factory drainage sludge discharged from homes, factories, etc., and can regenerate drainage sludge and reuse it as a soil conditioner or soil conditioner. C. General sludge such as polluted rivers and lakes can be purified, so that sludge can be regenerated and reused as a soil conditioner or soil conditioner. D. Sludge discharged by road works, civil works, etc. can be purified, so that sludge can be regenerated and reused as a soil conditioner or soil conditioner.

[Brief description of the drawings]

FIG. 1 is a flow sheet diagram of the chemical sludge treatment method of the present invention.

FIG. 2 is a flow sheet diagram of the chemical sludge treatment system of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sludge treatment mechanism 2 Treated sludge 2a Sewage and manure sludge 2b Sewage and drainage sludge 2c River and lake sludge 2d Civil engineering sludge 3 Feeder 4 Treated sludge storage 5 Quick lime reaction 6 Treated material feeder 7 Mixing tank 8 yards 9 Turning machine 10 Aging section

Claims (4)

[Claims] 1. A first treatment step of collecting and transporting organic and inorganic sludge generated from sewage, drainage, rivers, etc., a second treatment step of chemically reacting the treated sludge with quicklime, and a treatment by the chemical reaction And a third treatment step of thermally forming sludge. 2. The chemical sludge treatment method according to claim 1, wherein in the treatment method, organic and inorganic sludge generated from sewage, wastewater, rivers, etc. is regenerated at a generation site. 3. The component characteristics of the treated sludge obtained by the above-mentioned sludge treatment method are as follows: water: 8.97%; total nitrogen (N): 3.62%;
1.84% of total amount of phosphoric acid (P ₂ O ₅ ), total amount of potassium (K
₂ O) 0.21%, calcium carbonate (CaCO ₃ ) 3
9.37%, PH 12.1, Mercury (Hg) 0.18m
g, 9.6 mg of arsenic (As) and cadmium (Cd)
3. The chemical sludge treatment method according to claim 1, comprising 0.88 mg. 4. The method according to claim 1, wherein the sludge reactant component comprises water.
09%, total nitrogen (N) 1.88%, total phosphoric acid (P ₂
O ₅ ) 1.96%, total amount of potassium (K ₂ O) 2.05%, calcium carbonate (CaCO ₃ ) 24.97%, PH 8.8,
Mercury (Hg) less than 0.01 mg, arsenic (As) 0.3 m
g, cadmium (Cd) 0.24 mg.