Flow and device for aquaculture sewage combination purifying treatment

Abstract

The invention relates to a flow and a device for aquaculture sewage combination purifying treatment and belongs to the technical field of sewage treatment. The flow for sewage treatment includes that water in an aquaculture pond enters a batching tank in a dropping filtering device, a siphon device is adopted to enable water in the batching tank to enter the dropping filtering device, a fixed spraying device is then utilized to evenly spray water on the surface of the dropping filtering device, and treated water is redischarged into an aquaculture pond. Galvanized round steel is utilized as a support in a biological contact oxidation pond, a combination filler formed by a plastic ring and polyester silk is hung on a filler support and has good adaptability and high efficiency on pollutant in water, simultaneously the pulse aeration oxygenating technology is adopted to provide dissolved oxygen for a micro-biological degradation pollutant in the oxygenating time, and simultaneously has necessary washing effect on the aged biofilm on the filler. After the oxygenating process is stopped, power consumption is saved, and simultaneously denitrification reaction can better proceed favorably, accumulation of nitrite nitrogen in water is reduced, discharged water passes through a common dropping filtering device utilizing ceramsite as filler, and the discharged water can reach fishery water quality standard.

Description

technical field [0001] The invention relates to a combined purification process and device for aquaculture wastewater, which is an aquaculture wastewater treatment technology in the discipline of environmental engineering, a water quality improvement technology applied to aquaculture wastewater, and belongs to the technical field of sewage treatment. Background technique [0002] Aquaculture wastewater has the characteristics of low pollutant concentration and large wastewater discharge. At present, the water quality improvement technologies of aquaculture wastewater are roughly divided into physical treatment methods, chemical treatment methods, and biological treatment methods. Among them, conventional physical treatment technologies mainly include filtration, neutralization, adsorption, precipitation, aeration, membrane separation and other treatment methods. Among them, filtration and foam separation technology have better treatment effects, mainly removing suspended sol...

AI Technical Summary

Problems solved by technology

Among them, conventional physical treatment technologies mainly include filtration, neutralization, adsorption, precipitation, aeration, membrane separation and other treatment methods. Among them, filtration and foam separation technology have better treatment effects, mainly removing suspended solids (TSS) and some suspended solids (TSS) in aquaculture wastewater. Chemical oxygen demand (COD), but the removal effect on soluble organic matter, inorganic matter and total N, P, etc. is not good

At present, the chemical methods of aquaculture water treatment technology mainly include chemical flocculation technology, ozone oxidation technology, ultraviolet radiation disinfection technology, electrochemical technology, etc., mainly using water quality improvers, flocculants, and chemical oxidants to treat wastewater and remove suspended solids in water. Oxidative decomposition of refractory biodegradable dissolved organic matter, but there are disadvantages such as residual substances will have toxic effects on fish, cause secondary pollution to the environment, use a large amount, be unfavorable for economic utilization, and the research is not mature.

Biological treatment technology uses the absorption and metabolism of microorganisms, plants, aquatic animals, etc. to achieve the purpose of degrading organic matter and nutrients in water bodies. At present, there are only a small amount of research, and it has not been widely applied in the treatment of aquaculture wastewater.

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