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Compound sewage treatment agent

A technology of sewage treatment agent and dispersant, which is used in sludge treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem of reducing the treatment capacity of sewage treatment system, sludge loss, and excessive suspended solids in effluent. and other problems, to achieve the effect of maintaining a strong position, preventing and curbing sludge bulking, and improving efficiency

Inactive Publication Date: 2018-02-23
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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  • Compound sewage treatment agent
  • Compound sewage treatment agent
  • Compound sewage treatment 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, sulfuric acid to adjust the pH value to 5 for pre-dispersion, at 40 ° C, add TiO 2 Zirconium dioxide with a mass of 0.1%, aged for 2h; 2 0.1% by weight, stir well, adjust the pH of the solution to 8.5 with sodium silicate, 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, sulfuric acid to adjust the pH value to 5.5 for pre-dispersion, at 50 ° C, add TiO 2 Zirconium dioxide with a mass of 0.3% was aged for 3 hours; then sodium hexametaphosphate was added again under heat preservation conditions, and the amount of sodium hexametaphosphate added was TiO 2 0.2% by weight, stir well, adjust the pH of the solution to 9.5 with sodium silicate, 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, sulfuric acid to adjust the pH value to 5.2 for pre-dispersion, at 45 ° C, add TiO 2 0.2% SiO by mass 2 , aging for 2.5h; then add sodium hexametaphosphate again under the condition of heat preservation, the amount of sodium hexametaphosphate added is TiO 2 0.15% by weight, stir well, adjust the pH of the solution to 9 with sodium silicate, 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 compound sewage treatment agent. A preparation method of the compound sewage treatment agent comprises the following steps of: adding a dispersing agent into a TiO2 solution,adjusting the pH value to 5-5.5 with sulfuric acid for pre-dispersion, adding zirconium dioxide accounting for 0.1-0.3% of the mass of TiO2 at 40-50 DEG C, and carrying out aging for 2-3h; and then adding the dispersing agent again under the condition of heat preservation, stirring the dispersing agent uniformly, regulating the pH value to 8.5-9.5 with a sodium silicate adjustment solution, addingSiO2 accounting for 0.01-0.03% of the mass of TiO2, carrying out aging for 2-3h, and carrying out filtering and drying to obtain a final product. The additive provided by the invention adopts a multilayer coating process, and can wrap hyphomycete tentacles layer by layer to greatly reduce the specific surface area of hyphomycete, restrain competitive advantages of the hyphomycete and zooglea, maintain the powerful position of the zooglea in substrate competition, and improve the sludge treatment efficiency, thereby effectively preventing and restraining the explosion of sludge expansion.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a compound 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): C02F3/34C02F11/00
CPCC02F3/34C02F11/00C02F2303/06C02F2303/20
Inventor 唐毅
Owner 唐毅