Ship domestic sewage treatment coupling nitrogen and phosphorus recovery integrated system and method

Abstract

The invention discloses a ship domestic sewage treatment coupling nitrogen and phosphorus recovery integrated system. The system comprises a sewage mixing tank, a main function tank (an anaerobic zone, a struvite crystallization zone, a membrane biological reaction zone and a precipitation zone) and an ultraviolet disinfection system which are connected in sequence. The system also comprises a seawater storage tank and a magnesium ion nanofiltration concentration device, wherein the magnesium ion nanofiltration concentration device is connected with the struvite crystallization zone and the seawater storage tank respectively. The invention also discloses a method for treating ship domestic sewage and recovering nitrogen and phosphorus by using the system. The system and the method providedby the invention follow the requirement that the modern sewage treatment technology under the current sustainable development concept should simultaneously have the functions of water quality improvement, low energy consumption, pollutant resource utilization and the like, combine the characteristics of high concentrations of organic matters and nitrogen and phosphorus in ship domestic sewage tosolve the problems of low nitrogen and phosphorus removal efficiency, high energy consumption, resource waste and the like in the prior art, and can provide theoretical and technical support for the popularization and application of novel ship sewage advanced treatment and resource recovery processes and equipment.

Description

technical field [0001] The invention relates to biological treatment technology and resource recovery of ship domestic sewage, in particular to an integrated system and method for ship domestic sewage treatment coupled with nitrogen and phosphorus recovery. Background technique [0002] With the unprecedented development of the shipping industry and ocean development, the number of ships has increased dramatically, and the pollution of the marine environment has become more and more serious. The problem of domestic sewage pollution from ships brought by shipping has gradually attracted people's attention. As a mobile pollution source, ship sewage will cause eutrophication of the water body if it is directly discharged into the ocean and inland water environment (lakes, reservoirs), and in severe cases, it will lead to deterioration of water quality and fish death or migration. Nitrogen and phosphorus are the main elements that cause eutrophication in water bodies, but they ...

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Problems solved by technology

However, due to the high cost of adding magnesium sources, the application of the MAP method is limited, and researchers are looking for cheap and efficient precipitants

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