Marine aquaculture tail water treatment system

Abstract

The invention provides a marine aquaculture tail water treatment system, comprising a sewage collection pool, a physical filtering device, an air floatation tank and an electrode-suspended filler coupled biological filter treatment unit, wherein the sewage collection pool, the physical filtering device, the air floatation tank and the electrode-suspended filler coupled biological filter treatment unit are separately connected with a sludge concentration and dehydration device; suspended filler in the electrode-suspended filler coupled biological filter treatment unit is arranged in a biological filter; a direct current (DC) anodic-cathodic array combination is arranged at the upper part of the biological filter; an electric stirring device is arranged at the lower part of the biological filter; a sludge bucket is arranged at the bottom of the biological filter; the electric stirring device is arranged above the sludge bucket; a carbon source replenishment device is connected with the biological filter by means of a pipeline. The marine aquaculture tail water treatment system has the advantages of being high in nitrogen and phosphorus removal treatment efficiency, small in land occupation area, energy-saving, low in cost, free from secondary pollution, simple and convenient to manage, and the like.

Description

[0001] 【Technical field】 [0002] The invention relates to a marine aquaculture tail water treatment system. [0003] 【Background technique】 [0004] At present, the pond aquaculture tail water and factory aquaculture tail water in seawater are basically discharged directly without treatment. Since the seawater aquaculture tail water generally contains relatively high concentrations of inorganic nitrogen, active phosphate, chemical oxygen demand (COD), and suspended solids, it is easy to Lead to varying degrees of eutrophication pollution to the coastal waters. In order to protect the ecological environment of the coastal waters, both governments at all levels and the society require the treatment of aquaculture tail water, so that the water quality of the discharged water can meet the relevant national environmental protection requirements, such as meeting the "Requirements for Mariculture Tail Water Discharge" (SC / T 9103), the corresponding water quality standards in the nat...

AI Technical Summary

Problems solved by technology

The current seawater pond aquaculture tail water or factory aquaculture tail water treatment technology mainly adopts ecological pond technology and comprehensive application of chemical assisted phosphorus removal technology, such as aluminum chloride (PAC) assisted phosphorus removal, etc. to remove nitrogen and phosphorus, although there are certain Denitrification and phosphorus removal effect, but there are problems such as large area, low efficiency of denitrification and phosphorus removal, high operating cost, poor stability of treatment effect and secondary pollution if a large amount of chemical agents are used for a long time.

Due to limited land area and high treatment costs, many aquaculture farms fail to carry out tail water discharge treatment, pollute the surrounding sea environment or face the problem of being forced to stop production due to environmental protection failure

[0005] In addition, when the existing electrode is electrolyzed, the surface of the anode iron is easily passivated by the dense covering layer formed by oxides, resulting in the failure of electrolysis and the need for regular cleaning or replacement, which will lead to regular interruption of production and affect work efficiency. It also generates new waste water and increases costs

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