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Compound flocculant for restaurant and kitchen waste sorting wastewater pretreatment, and use method thereof

A technology for kitchen waste and pretreatment, which is applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The effect of concentration reduction

Inactive Publication Date: 2020-01-17
NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to propose an innovative solution for the above-mentioned shortcomings in the prior art, especially a solution that can effectively solve the problem of acidic sewage flocculation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: A compound flocculant for kitchen waste sorting waste water, which is composed of modified sepiolite, polymeric aluminum iron silicate and anionic polyacrylamide; modified sepiolite, polymeric aluminum iron silicate and anionic polyacrylamide The weight component ratio of acrylamide is compounded according to the concentration of suspended solids in kitchen waste water.

[0013] The preparation method of modified sepiolite is: add a certain amount of 0.5mol / L hydrochloric acid (1g sepiolite: 20ml hydrochloric acid) to sepiolite, activate it in a water bath at 70°C for 6-12h, and then dry it at 150°C for 2h , naturally cooled to room temperature, crushed and sieved to obtain acidified sepiolite. Then put the acidified sepiolite into the sodium alginate solution with a mass fraction of 0.2%, control the mass ratio of sodium alginate solid and sepiolite to 1:1~2, and adjust the pH of the solution to 6.0 with sodium hydroxide , stirred and reacted for 4 hours, c...

Embodiment 2

[0017] Example 2: A compound flocculant for kitchen waste sorting wastewater, which is composed of modified sepiolite, polymeric aluminum iron silicate and anionic polyacrylamide; modified sepiolite, polymeric aluminum iron silicate and anionic polyacrylamide The weight component ratio of acrylamide is compounded according to the concentration of suspended solids in kitchen waste water.

[0018] The preparation method of modified sepiolite is: add a certain amount of 0.5mol / L hydrochloric acid (1g sepiolite: 20ml hydrochloric acid) to sepiolite, activate it in a water bath at 70°C for 6-12h, and then dry it at 150°C for 2h , naturally cooled to room temperature, crushed and sieved to obtain acidified sepiolite. Then put the acidified sepiolite into the sodium alginate solution with a mass fraction of 0.2%, control the mass ratio of sodium alginate solid and sepiolite to 1:1~2, and adjust the pH of the solution to 6.0 with sodium hydroxide , stirred and reacted for 4 hours, ce...

Embodiment 3

[0023] A compound flocculant for kitchen waste sorting waste water, composed of modified sepiolite, polyaluminum iron silicate and anionic polyacrylamide; the weight of modified sepiolite, polyaluminum iron silicate and anionic polyacrylamide The component ratio is compounded according to the concentration of suspended solids in the kitchen wastewater.

[0024] The preparation method of modified sepiolite is: add a certain amount of 0.5mol / L hydrochloric acid (1g sepiolite: 20ml hydrochloric acid) to sepiolite, activate it in a water bath at 70°C for 6-12h, and then dry it at 150°C for 2h , naturally cooled to room temperature, crushed and sieved to obtain acidified sepiolite. Then put the acidified sepiolite into the sodium alginate solution with a mass fraction of 0.2%, control the mass ratio of sodium alginate solid and sepiolite to 1:1~2, and adjust the pH of the solution to 6.0 with sodium hydroxide , stirred and reacted for 4 hours, centrifuged, dried the solid matter a...

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PUM

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Abstract

The invention discloses a compound flocculant for restaurant and kitchen waste sorting wastewater pretreatment. The compound flocculant is composed of modified sepiolite, polyaluminum ferric silicate,and anionic polyacrylamide. A method for preparing the modified sepiolite is as follows: 0.5 mol / L hydrochloric acid is added into sepiolite, an addition amount is that 20 ml of hydrochloric acid isadded per 1 g of sepiolite, activation is performed in a water bath at 70 DEG C for 6-12 h, then drying is performed at 150 DEG C for 2 h, natural cooling to room temperature is performed, crushing and sieving are performed to obtain acidified sepiolite, then the acidified sepiolite is put into a sodium alginate solution with a mass percentage of 0.2%, a mass ratio of the sodium alginate solid tothe sepiolite is controlled to be 1:1-3, sodium hydroxide is used to adjust pH of the solution to be 6.0, a stirring reaction is carried out for 4 h, centrifugation is performed, a solid matter is dried at 75 DEG C for 2 h, crushing is performed, sieving is performed, and the modified sepiolite is obtained.

Description

technical field [0001] The invention relates to the technical field of kitchen waste water treatment, in particular to thick slurry waste water generated during the sorting and pretreatment process of kitchen waste. Background technique [0002] Food waste sorting waste water is waste water produced during the pretreatment process of food waste, such as water filtration, sorting, crushing, pulping, three-phase separation, etc., with high content of organic matter, ammonia nitrogen, total nitrogen, total phosphorus, and suspended solids If the kitchen waste sorting waste water is not pretreated by coagulation, flocculation, centrifugation, etc., and directly enters the biochemical system, the particulate matter and suspended matter contained in the food waste waste water entering the biochemical system will exceed the standard, which will seriously affect the working efficiency of the biochemical system. And service life, but also increase the output of sludge. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54C02F1/56C02F101/16C02F101/30
CPCC02F1/5236C02F1/5263C02F1/54C02F1/56C02F2101/16C02F2101/30
Inventor 刘军张迪孙少龙宫建瑞袁道迎高兴旺高尚
Owner NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD
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