A method of joint treatment of black and odorous water by using indigenous microbial film and microalgae

Abstract

The invention discloses a method for jointly treating black and odorous water by using indigenous microbial membranes and microalgae, including a pretreatment process for co-cultivating indigenous microbial membranes by biological contact oxidation: pretreating black and odorous water through contact oxidation, and simultaneously cultivating Indigenous microorganisms, under the action of abundant microorganisms, through a series of biochemical reactions such as nitrosation, nitrification and denitrification, finally form nitrogen out of the water body, thereby reducing the ammonia nitrogen content in the water body and improving the water quality; microalgae enhanced treatment: the pretreatment The final effluent is treated with microalgae intensified treatment, which can realize the purification and reuse of black and odorous water; the black and odorous water is pretreated by contact oxidation and co-cultured with indigenous microbial membranes, and then inoculated with UV-induced Haematococcus pluvialis M1 for further purification Water quality: Haematococcus pluvialis can be transformed from green vegetative cells into red hard-shelled spores under stress conditions (strong light, nitrogen deficiency), making it an indicator organism for verifying the treatment degree of black and odorous water.

Description

technical field [0001] The invention relates to the technical field of water environment treatment, in particular to a joint treatment process using indigenous microbial membranes and microalgae for the biodegradation of nitrogen, phosphorus and organic matter in black and odorous water. Background technique [0002] With the continuous development of economy and society, a large amount of industrial wastewater and domestic sewage flow into rivers. Although they are treated and discharged, they will still cause a sharp increase in the content of nutrients such as nitrogen and phosphorus in the water body, resulting in eutrophication of the water body. The low concentration of dissolved oxygen leads to incomplete degradation of organic matter, and the anoxic and anaerobic environment makes the water tend to be black and smelly. Black and odorous water has become a major threat to the safety of the water environment. Moreover, nutrients, high concentrations of biodegradable o...

AI Technical Summary

Problems solved by technology

Physical methods include environmental water diversion, sediment dredging, and artificial aeration. These methods can dilute black and odorous water and increase the dissolved oxygen content in water, but the operation consumes electricity, the treatment efficiency is low, and it is difficult to maintain the stability of the water quality after treatment; chemical methods Including flocculation and sedimentation, chemical algae killing and adding iron / aluminum salts, etc. These methods can effectively remove nitrogen and phosphorus in black and odorous water, but the medicines are expensive and easy to cause secondary pollution

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