Set for converting nitrogen and phosphorus in cultivation wastewater into magnesium ammonium phosphate on basis of seawater cell technology

Abstract

The invention relates to a set for converting nitrogen and phosphorus in cultivation wastewater into magnesium ammonium phosphate on basis of the seawater cell technology. An operating unit of the device is composed of seawater cell cathode made from magnesium or magnesium alloy, a seawater cell anode made from titanium, titanium alloy or graphite, and electrolyte, made from rich ions in seawater and nitrate, nitrite, ammonia nitrogen and phosphorus, formed in the cultivating process. A storage battery is further connected between the cathode and the anode. The bottom of the operating unit is provided with a drawer precipitate box; the side of the upper half of the device is provided with a seawater access; an airbag encloses the device. The set can be composed of multiple operating units in series connection. The set can remove the ammonia nitrogen and phosphorus in the wastewater with no need for externally applied drugs; the removal rate of ammonia nitrogen reaches 90% and above; removal rate of phosphorus reaches 95% and above; by serially connecting the operating units, processing capacity and output voltage can be increased; generated precipitate is a fertilizer, recycling of wastes is achieved, and economic benefit is created.

Description

technical field [0001] The invention relates to the field of environmental pollution control, in particular to a device for converting nitrogen and phosphorus in seawater aquaculture wastewater into ammonium magnesium phosphate based on seawater battery technology. Background technique [0002] In recent years, my country's mariculture industry has developed rapidly, and the aquaculture output has ranked first in the world for many years. At the same time, the total discharge of mariculture wastewater has exceeded the total discharge of land-based sewage. The main wastes in mariculture wastewater include residual bait, excrement, Chemical substances and therapeutic drug residues, dead bodies and pathogens of aquaculture organisms are also part of the waste. Therefore, after a large amount of aquaculture wastewater is discharged, nutrients such as nitrogen and phosphorus in the ocean water body increase sharply, resulting in eutrophication or eutrophication of the aquaculture w...

AI Technical Summary

Problems solved by technology

The physical method is to use sedimentation tank precipitation, sand filter tank filtration and adsorption with zeolite powder to remove impurities and dirt in water, but the removal effect on soluble organic matter, inorganic matter and total N, P, etc. is not good; the earlier used The chemical treatment methods of mariculture wastewater, such as copper sulfate, bleaching powder, malachite green and other water quality improvers, can also treat the wastewater after aquaculture to a certain extent, but because these methods will cause secondary pollution to the environment, and some methods are still It will cause harm to the human body, and its use is now prohibited; at present, biological contact oxidation, biological turntable, biological fluidized bed and other processes are widely used in the biochemical treatment of mariculture wastewater. Compared with physical and chemical technology, it has low investment and is not easy to produce secondary Pollution and other advantages, but due to the salinity effect of aquaculture wastewater, the overall metabolic selectivity of the biological phase and the proportion of effective microorganisms in these processes are low, the unit volume treatment load of the system is not high, and the treatment cycle is long

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