Integrated sewage treatment equipment with a daily processing capacity of 20 tons

Description :

　　Integrated sewage treatment equipment with a daily processing capacity of 20 tons

　　Cultivation of bacterial strains

　　Selection of bacterial culture structures: Convenient to operate, equipped with aeration devices and agitation, suitable for adding bacterial strains, raw water or nutrient solution.

　　When adding bacterial strains, the plan setting should be comprehensively considered based on the conditions available on site. Factors such as site, construction, transportation vehicles, temporary power sources, temporary pumps and pipelines, water guns, elevation differences, filtration, etc.

　　The pulverization of bacterial strains should consider the pulverization of compressed sludge, and the pulverization method should be determined according to the on-site conditions. The order of selecting crushing methods is water gun - pump circulation+filter impact - aeration, stirring.

　　When the activity of the bacterial strain decreases, first add the restoring bacterial strain to restore its activity. Due to the fact that bacterial strains have often been separated from their original aerobic environment for a long time, they should be added to the cultivation structure as soon as possible after being transported to the site. When adding, the structure should be in the aeration process, and aeration should be continued after each batch is added. On the one hand, anaerobic bacteria should be eliminated, and on the other hand, nutrients in the structure should be consumed to restore their activity.

　　The cultivation of bacterial strains enters the cultivation stage after the recovery of activity, with the aim of promoting the rapid growth of activated sludge to a certain order of magnitude. During the recovery period of bacterial activity, there is also partial proliferation of the strain itself. The cultivation of bacterial strains can be carried out separately or synchronously with domestication, usually focusing on cultivation, that is, increasing sludge volume, while also considering domestication. If the concentration of raw water is high or the toxicity is strong, nutrient solution or domestic sewage should be mainly added during cultivation; If the raw water is basically non-toxic and the carbon nitrogen ratio is appropriate, it can be used as the main source during the cultivation stage.

　　Integrated sewage treatment equipment with a daily processing capacity of 20 tonsDomestication of activated sludge

　　The principles to be followed in the domestication of activated sludge should be gradual, targeted, and carefully controlled. The methods and techniques for domestication of activated sludge: If the main addition during the cultivation period is domestic sewage, gradually reduce the amount of domestic sewage and gradually increase the inflow of raw water. Each increase in inflow should be 5-10% of the design inflow, and each increase should be stable for 2-3 cycles or about 2 days. If the system or effluent index rises, the inflow should be maintained until the effluent index stabilizes. If the effluent index continues to rise, the inflow should be suspended until the index returns to normal. The inflow should be slightly reduced or slightly greater than the inflow of the previous cycle.

　　Composition of biofilm by biofilm method

　　The ecosystem composed of bacteria and various other microorganisms on the biofilm, as well as the degradation function of organic matter by the biofilm, have reached equilibrium and stability.

　　For urban sewage, it generally takes about 30 days for biofilm to form and mature at 20 ° C.

　　Property: Highly hydrophilic, with an attached water layer

　　Microorganisms are highly dense: various bacteria and microorganisms play a major role in removing organic pollutants from wastewater, forming a food chain of organic pollutants - bacteria - protozoa (protozoa).

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