JPH0557006B2 - - Google Patents
Info
- Publication number
- JPH0557006B2 JPH0557006B2 JP61033943A JP3394386A JPH0557006B2 JP H0557006 B2 JPH0557006 B2 JP H0557006B2 JP 61033943 A JP61033943 A JP 61033943A JP 3394386 A JP3394386 A JP 3394386A JP H0557006 B2 JPH0557006 B2 JP H0557006B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- mannitz
- present
- chitosan
- polyacrylamide
- 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.)
- Expired - Lifetime
Links
- 239000000203 mixture Substances 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 229920001661 Chitosan Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 3
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims 2
- 239000010802 sludge Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 229920006317 cationic polymer Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Description
（産業上の利用分野）
本発明はカチオン性高分子凝集剤組成物に関す
るものであり、各種廃水の生物処理工程より発生
する有機性汚泥の脱水に用いられる。
（従来の技術）
ポリアクリルアミドマンニツヒ変性物は従来よ
り汚泥脱水用高分子凝集剤として用いられてい
る。
（発明が解決しようとする問題点）
ポリアクリルアミドマンニツヒ変性物は大きな
フロツクを生じ初期水性は良いもののケーキ含
水率が高い欠点が有る。又、汚泥のPHが６以上に
なると凝集効果が低下する。
（問題を解決する為の手段）
ポリアクリルアミドマンニツヒ変性物１重量部
に対し、キトサン0.4〜0.6重量部、スルフアミン
酸1.0〜2.5重量部を混合する事により、汚泥脱水
時の初期水性と脱水ケーキの含水率低下を同時
に満足させる汚泥脱水用高分子凝集剤組成物を得
る事ができる。
本発明に用いるポリアクリルアミドマンニツヒ
変性物はPH３におけるカチオン量値が３meq/g以
上であり、固有粘度が４dl/g以上である事が望
ましい。
キトサンは通常汚泥脱水に使用されているカチ
オン当量3.5〜4.5meq／ｇの加水分解率の製品を
そのまま使用できる。
以下実施例により本発明を具体的に説明する。
（実施例）
脱水試験に供した凝集剤の組成を表−１示す。
(Industrial Application Field) The present invention relates to a cationic polymer flocculant composition, which is used for dewatering organic sludge generated from various wastewater biological treatment processes. (Prior Art) Mannitz modified polyacrylamide has been used as a polymer flocculant for sludge dewatering. (Problems to be Solved by the Invention) Mannich-modified polyacrylamide produces large flocs, and although it has good initial aqueous properties, it has the disadvantage of a high cake moisture content. Furthermore, when the pH of the sludge becomes 6 or more, the flocculation effect decreases. (Means for solving the problem) By mixing 0.4 to 0.6 parts by weight of chitosan and 1.0 to 2.5 parts by weight of sulfamic acid to 1 part by weight of polyacrylamide Mannitz modified product, the initial aqueous property during sludge dewatering and the dewatered cake can be improved. It is possible to obtain a polymer flocculant composition for sludge dewatering that simultaneously satisfies the reduction in water content. It is desirable that the Mannitz-modified polyacrylamide used in the present invention has a cation content value of 3 meq/g or more at PH3 and an intrinsic viscosity of 4 dl/g or more. As chitosan, a product with a hydrolysis rate of 3.5 to 4.5 meq/g of cation equivalent, which is normally used for sludge dewatering, can be used as is. The present invention will be specifically explained below using Examples. (Example) Table 1 shows the composition of the flocculant used in the dehydration test.
【表】【table】
【表】
（脱水試験）
下水処理汚泥（PH：5.0、SS：2.9％、灰分：40
％）に凝集剤を添加し、ベルトプレスにより脱水
した試験結果を表−２及び表−３に示す。（プレ
ス圧力：２Kg/cm2、汚泥供給量：６m2/m.hr、
布敷島キヤンバス製FN1101−XB）[Table] (Dehydration test) Sewage treatment sludge (PH: 5.0, SS: 2.9%, ash content: 40
Table 2 and Table 3 show the test results in which a flocculant was added to the sample (%) and dehydrated using a belt press. (Press pressure: 2Kg/cm 2 , Sludge supply amount: 6m 2 /m.hr,
FN1101−XB manufactured by Fushikishima Canvas)
【表】【table】
【表】【table】
【表】
（効 果）
脱水試験の結果で明白な様にキトサンは凝集フ
ロツクが小さく初期水が悪い。マンニツヒ化
PAAは凝集フロツクは大きく過脱水はできる
ものの、本発明の組成比をはずれた比較例ではい
ずれも含水率は76％以上であるのに対し本発明実
施例においては全て75％以下であり脱水性の良さ
を物語つている。含水率がこの様に下かると汚泥
脱水ケーキの性状も固くなり、燃焼又はコンボス
ト化において空気との接触が良くなり効率が改善
される。[Table] (Effects) As is clear from the results of the dehydration test, chitosan has a small flocculation and poor initial water content. Mannichization
Although PAA has a large agglomerated floc and can be over-dehydrated, all of the comparative examples that differ from the composition ratio of the present invention have a water content of 76% or more, while the water content of all the examples of the present invention is 75% or less, making it difficult to dehydrate. It tells the story of how good it is. When the moisture content is lowered in this way, the properties of the sludge dewatered cake become hard, which improves the efficiency of combustion or combustion by improving contact with air.
Claims (1)
キトサン粉末及びスルフアミン酸を１：0.4〜
0.6：1.0〜2.5の重量比率で混合する事からなる高
分子凝集剤組成物。1. Polyacrylamide Mannitz modified powder, chitosan powder and sulfamic acid in a ratio of 1:0.4~
A polymer flocculant composition comprising mixing at a weight ratio of 0.6:1.0 to 2.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61033943A JPS62193607A (en) | 1986-02-20 | 1986-02-20 | High molecular flocculant composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61033943A JPS62193607A (en) | 1986-02-20 | 1986-02-20 | High molecular flocculant composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62193607A JPS62193607A (en) | 1987-08-25 |
| JPH0557006B2 true JPH0557006B2 (en) | 1993-08-23 |
Family
ID=12400588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61033943A Granted JPS62193607A (en) | 1986-02-20 | 1986-02-20 | High molecular flocculant composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62193607A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384263B (en) * | 2015-12-07 | 2018-02-23 | 湖北地大热能科技有限公司 | Sulfamic acid modification of chitosan water antisludging agent and preparation method thereof |
| CN108083613A (en) * | 2017-12-27 | 2018-05-29 | 广州再森新材料科技有限公司 | A kind of sewage sludge high-efficiency dehydration agent and its preparation method and application |
-
1986
- 1986-02-20 JP JP61033943A patent/JPS62193607A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62193607A (en) | 1987-08-25 |
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