Method for preparing enzyme and bacterium composite agent for treating sewage and sludge

Abstract

The invention relates to a method for preparing an enzyme and bacterium composite agent for treating sewage and sludge, which comprises the following steps: (1) preparing bacillus subtilis powder; (2) preparing bacterial solution of photosynthetic bacteria; (3) obtaining indigenous bacteria by collection, culture and enrichment culture; (4) performing domestication culture of working bacteria, namely adding indigenous bacteria and a composite culture medium according to different sludge loads, adding bacillus subtilis enzyme powder in an amount which is 0.1 to 0.4 percent based on total weight and bacterial solution of photosynthetic bacteria in an amount which is 1 to 3 percent based on the total weight, performing tests under different loads and different organic matter concentration, determining an optimal parameter, and repeating for 3 times; and (5) performing domestication and amplification culture of the working bacterium composite agent, and obtaining the domesticated working bacterium composite agent in which the viable count per milliliter is cfu 10<7> to 10<9>. The enzyme and bacterium composite agent prepared by the method can treat sewage and sludge efficiency, simplyand conveniently, has very high adaptability to any sewage environment, and has a guiding and coordinating effect on beneficial decomposing bacteria in local environments.

Description

technical field [0001] The invention relates to a preparation method of an enzyme-bacteria compound agent for treating sewage sludge (silt). The enzyme-bacteria compound agent can be used to treat urban domestic sewage, livestock and poultry breeding wastewater, biogas slurry, river bends, lakes, ponds, swamps, Landscape and other sewage sludge in closed or semi-closed waters where the water flow is stagnant or the water flow is very slow, and it belongs to the technical field of environmental protection. Background technique [0002] The water environment is an important part of the earth's ecological environment. With the development of the economy, water pollution is also a problem that cannot be ignored. Due to the concentration of industry and commerce and dense population in my country's cities, the production of domestic sewage is large, and there are many types of pollutants and high loads. 80% of urban sewage is domestic sewage, mainly feces, rot and other sewage, ...

AI Technical Summary

Problems solved by technology

However, the above methods generally have harsh conditions for microbial domestication and cultivation, the effect is not obvious when the sewage load is too large in the rainy season, and the application is not wide enough, as well as the shortcomings of large floor area and high equipment cost, so they cannot be widely used in the treatment of large areas of sewage sludge. project

[0011] The study believes that the main reason for the poor effect is that after the probiotics with decomposing ability are added to the sewage sludge to be treated, the high concentration of nitrogen, phosphorus and other organic matter, lipids, heavy metals and other substances in the water environment will cause the function of some microorganisms. Loss and death; some harmful microorganisms that are compatible with probiotics in the water environment, the adaptability and synergistic effect of ordinary probiotics are not strong, and the loss is too large in the process of running in with the environment, so that they cannot perform efficiently and with high quality , so that the harmful substances in the sewage cannot be completely treated, resulting in the failure of treatment

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