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Domestic sewage treating agent

A technology for domestic sewage and treatment agent, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. and other problems to achieve the effect of preventing and curbing sludge bulking, maintaining a strong position and improving efficiency

Inactive Publication Date: 2018-04-06
唐毅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once sludge bulking occurs, its harm is extremely serious, not only causing sludge loss and effluent suspended solids (SS) to seriously exceed the standard, but also greatly reducing the processing capacity of the sewage treatment system, and it will take a long time to restore the system to normal

Method used

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  • Domestic sewage treating agent
  • Domestic sewage treating agent
  • Domestic sewage treating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] TiO with a mass concentration of 20% 2 Sodium hexametaphosphate is added to the solution, and the amount of sodium hexametaphosphate added is TiO 2 0.1% by weight, sodium silicate to adjust the pH value to 9 for pre-dispersion, at 40 ° C, add TiO 2 0.1% silicon dioxide by mass, aging for 2h; then add sodium hexametaphosphate again under the condition of heat preservation, the addition amount of sodium hexametaphosphate is TiO 2 0.1% by weight, stir well, adjust the pH of the solution to 8.5 with aluminum sulfate, add TiO 2 Al2O3 with a mass of 0.01%, aged for 2 hours, filtered, and baked at 105°C for 12 hours to obtain the product.

Embodiment 2

[0016] TiO with a mass concentration of 30% 2 Sodium hexametaphosphate is added to the solution, and the amount of sodium hexametaphosphate added is TiO 2 0.2% by weight, sodium silicate to adjust the pH value to 10 for pre-dispersion, at 50 ° C, add TiO 2 0.3% silicon dioxide by mass, aging for 3h; then adding sodium hexametaphosphate again under heat preservation conditions, the amount of sodium hexametaphosphate is 2 0.2% by weight, stir well, adjust the pH of the solution to 9.5 with aluminum sulfate, add TiO 2 Al2O3 with a mass of 0.03%, aged for 3 hours, filtered, and baked at 120°C for 24 hours to obtain the product.

Embodiment 3

[0018] TiO with a mass concentration of 25% 2 Sodium hexametaphosphate is added to the solution, and the amount of sodium hexametaphosphate added is TiO 2 0.15% by weight, sodium silicate to adjust the pH value to 9.5 for pre-dispersion, at 45 ° C, add TiO 2 0.2% silicon dioxide by mass, aging for 2.5h; then add sodium hexametaphosphate again under heat preservation conditions, the amount of sodium hexametaphosphate is 2 0.15% by weight, stir evenly, adjust the pH of the solution to 9 with aluminum sulfate, add TiO 2 Al2O3 with a mass of 0.02%, aged for 2.5h, filtered, and baked at 115°C for 18h to obtain the product.

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PUM

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Abstract

The invention provides a domestic sewage treating agent. A preparation method of the domestic sewage treating agent comprises the following steps: adding a dispersant to a TiO2 solution, regulating pHto 9-10 by sodium silicate, performing pre-dispersion, adding SiO2 accounting for 0.1%-0.3% by mass of TiO2 at 40-50 DEG C, and performing aging for 2-3 h; adding the dispersant again under the temperature keeping condition, uniformly stirring the materials, regulating pH of the solution to 8.5-9.5 by aluminum sulfate, adding Al2O3 accounting for 0.01%-0.03% by mass of TiO2, performing aging for2-3 h, and performing filtering and drying to obtain a product. A multi-layer coating process is adopted for an additive, tentacles of filamentous bacteria can be entangled layer by layer, the specific surface area of the filamentous bacteria is reduced greatly, the competitive advantage of the filamentous bacteria with zoogloea is inhibited, and strong position of the zoogloea in substrate competition is kept, the sludge treatment efficiency is increased, and explosion of sludge bulking is prevented and restrained effectively.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a domestic sewage treatment agent. Background technique [0002] Urban domestic sewage generally adopts activated sludge treatment process, such as A / O process is one of the commonly used ones. It is well known that the occurrence rate of sludge bulking in activated sludge treatment process is extremely high, even in developed countries in Europe and America. As high as 50 to 60%, the incidence rate of domestic sewage treatment plants in cities at all levels in my country is even higher. Once sludge bulking occurs, its harm is extremely serious, not only causing sludge loss and effluent suspended solids (SS) to seriously exceed the standard, but also greatly reducing the processing capacity of the sewage treatment system, and it will take a long time to restore the system to normal. For the sewage treatment system using the activated sludge method, the activa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00
CPCC02F3/00
Inventor 唐毅
Owner 唐毅