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Compound water treatment agent

A water treatment agent and compound technology, which is applied in water/sewage treatment, water treatment parameter control, water/sludge/sewage treatment, etc., can solve the problem of unsatisfactory SS and turbidity efficiency, and slow bridge aggregation and settlement , The sludge compression ratio is not large enough to achieve the effect of saving backwash water, lengthening the backwash cycle, and large flocs

Pending Publication Date: 2019-12-13
北京利赛格环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the water treatment agents used for flocculation and sedimentation are single traditional aluminum salts, iron salts, polyacrylamide, etc. Some problems: the reaction flocculation speed is relatively slow, the flocs are relatively small, dispersed and not compact enough, the bridging aggregation and settlement speed is slow, and the removal efficiency of SS and turbidity is not ideal
At the same time, the compression ratio of the sludge in the sludge treatment stage is not large enough, that is, the moisture content in the exported sludge is relatively high
In addition, the traditional process is not ideal in terms of additional removal of COD, BOD, ammonia nitrogen, total nitrogen, total phosphorus, heavy metal ions and chromaticity while flocculating and settling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Rainwater treatment: take 5 samples of rainwater source, put into compound water treatment agent, the composition of compound water treatment agent is: natural kaolin 3.5kg, natural cellulose 3.2kg, mercaptoacetyl chitosan 0.7kg, lignin quarter 2.4kg of amine salt and 0.2kg of polyacrylamide, the input concentration is 60g / m 3 , under the conditions of pH=6.7 and temperature 25°C, stir at 350 rpm for 1 minute, then stir at 150 rpm for 3 minutes, and after natural sedimentation for 10 minutes, take the supernatant and the corresponding water source samples for turbidity analysis. The results of the comparison are shown in Table 1.

[0021] Table 1

[0022] Sample serial number Turbidity before treatment (NTU) Turbidity after treatment (NTU) Turbidity removal rate (%) 1 42.35 0.85 97.99 2 55.12 0.93 98.31 3 39.26 0.77 98.04 4 60.38 0.95 98.43 5 35.86 0.75 97.91

Embodiment 2

[0024] Domestic sewage treatment: take 5 parts of domestic sewage water samples, put into compound water treatment agent, the composition of compound water treatment agent is: natural kaolin 3.0kg, natural cellulose 3.8kg, mercaptoacetyl chitosan 0.8kg, wood 2.0kg of quaternary ammonium salt and 0.4kg of polyacrylamide, the input concentration is 80g / m 3 , under the conditions of pH=7.4 and temperature 25°C, stir at 380 rpm for 1.5 minutes, then stir at 180 rpm for 4 minutes, and after natural settlement for 10 minutes, take the supernatant and the corresponding domestic sewage water samples for SS comparative measurement, the measurement results are shown in Table 2.

[0025] Table 2

[0026] Sample serial number SS before treatment (mg / L) After treatment SS(mg / L) SS removal rate (%) 1 324.84 8.52 97.38 2 363.27 6.87 98.11 3 358.65 7.16 98.00 4 354.21 9.52 97.31 5 295.86 9.19 96.89

Embodiment 3

[0028] Industrial sewage treatment: take 5 parts of industrial sewage water samples, put into compound water treatment agent, the composition of compound water treatment agent is: natural kaolin 3.8kg, natural cellulose 3.0kg, mercaptoacetyl chitosan 0.5kg, wood 2.4kg of quaternary ammonium salt and 0.3kg of polyacrylamide, the input concentration is 90g / m 3 , under the conditions of pH=6.2 and temperature 25°C, stir at 400 rpm for 1.5 minutes, then stir at 180 rpm for 4 minutes, and after 10 minutes of natural sedimentation, take the supernatant and corresponding industrial sewage water samples for The comparative determination of COD, BOD, ammonia nitrogen, total nitrogen and total phosphorus, the measurement results are shown in Table 3 and Table 4.

[0029] table 3

[0030]

[0031]

[0032] Table 4

[0033]

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Abstract

The invention relates to a compound water treatment agent. The compound water treatment agent is prepared by grinding natural kaolin, natural cellulose, mercaptoacetyl chitosan, lignin quaternary ammonium salt and polyacrylamide into powder and uniformly mixing the powder. The compound water treatment agent has the advantages of high reaction flocculation speed, many flocculation nucleuses, high coagulation speed, large and compact flocs and obviously higher bridging aggregation settling speed; the flocculation turbidity removal effect is good, the effluent quality is improved, and the subsequent filtering pressure is reduced, so that the backwashing period of the filter tank is prolonged, the backwashing frequency is reduced, and the backwashing water quantity is saved; when SS and turbidity in the water body are removed through flocculating settling, most of total phosphorus, part of COD, BOD, ammonia nitrogen and total nitrogen in the water and most of heavy metal ions and water body chromaticity can be additionally removed, so that the pressure of a biochemical process frequently adopted for removing the organic pollutants in the subsequent process is reduced; the treatment effect on various water qualities is obvious, and particularly, the treatment effect on high-turbidity polluted water is more outstanding.

Description

technical field [0001] The invention relates to a composite water treatment agent, which belongs to the technical field of water treatment. Background technique [0002] In the field of sewage treatment, the efficiency and effect of the treatment of various domestic sewage, industrial sewage, rainwater, landscape water and other water bodies are particularly important. At present, most of the water treatment agents used for flocculation and sedimentation are single traditional aluminum salts, iron salts, polyacrylamide, etc. Some problems: the reaction flocculation speed is relatively slow, the flocs are relatively small, dispersed and not compact enough, the bridging aggregation and settlement speed is slow, and the removal efficiency of SS and turbidity is not ideal. At the same time, the compression ratio of the sludge in the sludge treatment stage is not large enough, that is, the moisture content in the exported sludge is relatively high. In addition, the traditional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54C02F1/56C02F1/00C02F101/16C02F101/20
CPCC02F1/00C02F1/5236C02F1/54C02F1/56C02F2101/16C02F2101/20C02F2209/08C02F2209/14C02F2209/16C02F2209/18
Inventor 马东晖
Owner 北京利赛格环保科技有限公司