Method for treating aquaculture sewage based on microbial degradation

Abstract

The invention provides a method for treating aquaculture sewage based on microbial degradation, and belongs to the technical field of environmental protection. According to the method, a filtering filler loaded with algae bacteria is provided for preliminary adsorption and filtration of sewage, and algae bacteria fixed pellets are provided for symbiotic purification of the sewage. The algae bacteria are placed in a nitrogen-free phosphorus-free culture environment for enlargement culture, and nitrogen and phosphorus domestication is performed before loading or fixing, when the domestication operation is terminated, a weight percentage of ammonia nitrogen in the culture environment is at least 25%, and a weight percentage of phosphorus is at least 20%. The method has remarkable decontamination and deodorization treatment effects, can adapt to large changes in the nitrogen and phosphorus content of sewage, and treatment temperature, has high microbial nitrogen and phosphorus tolerance and removal rate, and has low treatment input cost and energy consumption. The used filtering filler has large loading capacity, high adsorption capacity and adsorption efficiency, and low biological loss during a storage period. The used algal bacteria fixed pellets have high mass transfer efficiency, good anti-microbial decomposition performance, long storage period and effective use period, and high sewage treatment efficiency of the microorganism at a relatively low temperature.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for treating aquaculture sewage based on microbial degradation. Background technique [0002] my country is the largest aquaculture country in the world. Aquaculture plays a huge role in ensuring national food security and stabilizing the supply of aquatic products. With the further improvement of people's demand for food quality, the aquaculture industry still has great development space. Although my country's aquaculture has a large scale, due to backward production methods, there are currently prominent problems such as large water consumption, heavy aquaculture pollution, and low production efficiency, which seriously restrict the healthy and sustainable development of aquaculture. [0003] Aquaculture wastewater is produced during the aquaculture process. In aquaculture sewage, the decomposition of residual bait and feces; the decomposi...

AI Technical Summary

Problems solved by technology

At present, according to the sewage treatment technology, sewage treatment includes activated sludge method, anaerobic method, biofilm method, etc., and these processes have disadvantages: the activated sludge method occupies a large area, consumes a lot of energy, produces a large amount of excess sludge, and is harmful to the environment. The treatment effect of refractory organic sewage is poor; the biomass in the anaerobic reactor has a long start-up time, the effluent water quality cannot meet the discharge standard, and the anaerobic treatment has a low kinetic rate at low temperature; the biofilm effluent quality is not ideal, and the load Low, poor impact resistance, etc., it is difficult to meet the increasingly stringent sewage discharge standards

Images