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Sewage treating agent

A technology of sewage treatment agent and dispersant, which is used in biological water/sewage treatment, water/sludge/sewage treatment, water treatment parameter control, etc. capacity and other issues to achieve the effect of preventing and curbing sludge bulking, improving efficiency and maintaining a strong position

Inactive Publication Date: 2018-03-02
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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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% SiO by mass 2 , adjust the pH of the solution to 8.5 with sodium silicate, and age for 2 hours; then add sodium hexametaphosphate again under the condition of heat preservation, and the amount of sodium hexametaphosphate added is TiO 2 0.1% by weight, stir well, add TiO 2 0.01% SiO by mass 2 , aged for 2h, filtered, and baked at 105°C for 12h.

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% SiO by mass 2 , adjust the pH of the solution to 9.5 with sodium silicate, and age for 3h; 2 0.2% by weight, stir well, add TiO 2 0.03% SiO by mass 2 , aged for 3h, filtered, and baked at 120°C for 24h.

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% SiO by mass 2 , adjust the pH of the solution to 9 with sodium silicate, and age for 2.5h; 2 0.15% by weight, stir well, add TiO 2 0.02% SiO by mass 2 , aged for 2.5h, filtered, and baked at 115°C for 18h.

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Abstract

The invention provides a sewage treating agent. A preparation method of the sewage treating agent comprises the following steps: adding a dispersing agent into a TiO2 solution, regulating a pH value to 9-10 to pre-disperse, adding SiO2 which accounts for 0.1-0.3% of the mass of TiO2 at a temperature of 40-50 DEG C, regulating the pH value of a solution to 8.5-9.5 by sodium silicate, and ageing for2-3 hours; then, re-adding the dispersing agent at a heat preserving condition, uniformly stirring, adding SiO2 which accounts for 0.01-0.03% of the mass of the TiO2, ageing for 2-3 hours, filteringand drying, thereby obtaining the sewage treating agent. The additive adopts a multi-layer coating process, can wind filamentous bacteria tentacles layer by layer, greatly reduces the specific surfacearea of filamentous bacteria, inhibits competitive advantages of the filamentous bacteria and zooglea, keeps powerful status, in substrate competition, of the zooglea, and improves sludge treatment efficiency, so that sludge expansion is effectively prevented and inhibited.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a 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 activated sludg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCC02F3/12C02F2209/08C02F2303/00Y02W10/10
Inventor 唐毅
Owner 唐毅