Method for treating black and odorous water through combination of indigenous microbial film and microalgae

Abstract

The invention discloses a method for treating black and odorous water through a combination of an indigenous microbial film and microalgae. The method comprises the following steps: a pretreatment process of biological contact oxidation and co-cultivation of the indigenous microbial film: pretreating black and odorous water through a contact oxidation method, performing co-cultivation of indigenous microorganisms at the same time, and conducting a series of biochemical reactions such as nitrosation, nitrification and denitrification under the action of rich microorganisms so as to finally forma nitrogen-separated water body, thereby reducing the content of ammonia nitrogen in the water body and improving the quality of the water body; and microalgal enhancement treatment: carrying out microalgal enhancement treatment on pretreated effluent so as to realize purification and reutilization of the black and odorous water. According to the method, the black and odorous water is pretreatedby virtue of contact oxidation and co-cultivation of the indigenous microbial film, and then ultraviolet-induced Haematococcus pluvialis M1 is inoculated to further purify the water; and due to the characteristic that the Haematococcus pluvialis can be converted into red hard-shell spores from green vegetative cells under stress conditions (strong light and nitrogen deficiency), the Haematococcuspluvialis can be used as an indicator organism for verifying the treatment degree of the 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...

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