Microbial agent for treatment of sewage and sludge

Abstract

Belonging to the field of microbial environmental protection, the invention provides a microbial agent for treatment of sewage and sludge. The microbial agent mainly includes Rhodospirillum rubrum, rhodopseudomonas palustris, bacillus subtilis, Streptomyces microflavus, streptococcus thermophilus, candida utilis, Streptomyces viridis, pseudomonas aeruginosa, virgibacillus halodenitrificans, and Paracoccus denitrificans 10 bacteria. Each bacterium is subjected to conventional slant culture, shaking culture and seed tank cultivation respectively, the bacteria in the seed tank are mixed and then put into sewage directly, symbiosis of flora is utilized to reach the purpose of treating sewage and reducing sludge generation. The microbial agent provided by the invention can be applied to large-scale production and direct adding, is low in cost, and can adapt to changeful sewage components. And the flora has good impact resistance to sewage.

Description

Technical field [0001] The microbial agent for treating sewage and sludge of the present invention belongs to the field of microbial environmental protection, and particularly relates to a microbial agent for treating sewage and sludge. Background technique [0002] With the acceleration of China’s urbanization process, the rate of urban sewage treatment has increased year by year, and the sludge output of urban sewage treatment plants has also increased sharply. An urban sewage treatment plant and sludge treatment cannot fully play its role in eliminating pollution and protecting the environment. At the same time, it will also pose a serious threat to the ecological environment and human activities. Among them, the main characteristics of sludge are high water content (up to 99% or more), high organic content, easy to rot and smell, and have finer particles and small specific gravity. It is a colloidal liquid, which is a thick substance between liquid and solid. The sludge has a...

AI Technical Summary

Problems solved by technology

[0002] With the acceleration of urbanization in our country, the rate of urban sewage treatment has increased year by year, and the sludge output of urban sewage treatment plants has also increased sharply. An urban sewage treatment plant and sludge treatment cannot fully play its role in eliminating pollution and protecting the environment. At the same time, it will also pose a serious threat to the ecological environment and human activities. The main characteristics of sludge are high water content (up to 99%), high content of organic matter, easy to rot and smell, and fine particles, small specific gravity, It is in a colloidal liquid state, which is a thick substance between liquid and solid. The sludge has a high water content, a large volume, and is fluid, with poor compressibility and dehydration, such as improperly disposed sewage. After the sludge enters the environment, it will directly cause secondary pollution to the water body and the atmosphere;

[0003] At present, the main technologies for sludge reduction include: ozone oxidation, ultrasonic cell crushing, decoupling, chemical methods, etc., but the cost is too high; microbial methods start with sewage treatment, the source of sludge production, without changing the original sewage treatment In the case of equipment, technology and methods, it can not only treat sewage, but also effectively solve the problem of reducing the amount of sludge generated in industrial wastewater and urban domestic sewage treatment;

[0004] However, the existing microbial treatment of sewage and sludge requires a series of processes such as sampling, culture medium cultivation, strain separation, strain analysis, identification, compatibility and optimization for different sewage and sludge, which is time-consuming and labor-intensive;

[0005] The patent No. 201210265567.2 is a compound microbial agent for sludge reduction and its preparation method and application. It utilizes the interaction between microbial groups to form a biodegradation system with high activity of various enzymes required to effectively destroy and decompose dead and aging bacteria in activated sludge, and can decompose organic matter at the same time, and reduce the amount of excess sludge without affecting the quality of effluent water; The cost is high, the flora cannot adapt to the variable sewage composition, the impact resistance to sewage is poor, and the application cost is high and the effect is not ideal