Method for treating domestic sewage of compound ship

Abstract

The invention relates to a method for treating domestic sewage of a compound ship. The method is characterized by comprising the following steps: crushing: crushing bigger solid grains in the domestic sewage collected in a collecting jar by using a crushing pump; introducing seawater: mixing the seawater with the sewage at a certain ratio; electrically flocculating: introducing the mixed sewage which is formed after mixing the seawater with the sewage into an electric flocculating device for performing the electric flocculating treatment; electrolyzing: utilizing a water pump to pump the sewage into an electrolytic bath for electrolyzing, oxidizing the sewage in the electrolytic bath, and meanwhile, generating sodium hypochlorite and killing escherichia coli; continuing oxidizing: continuing oxidizing and disinfecting the electrolyzed sewage in an oxidizing collecting jar, and discharging hydrogen generated after electrolyzing; and neutralizing: introducing the sewage into a neutralizing unit, neutralizing residual chlorine, and after reaching the standard, discharging the treated qualified sewage out of a ship board by using a discharging pump. The method provided by the invention has the advantages of high degree of automation, small volume, strong water-quality adaptation, simpleness and convenience in operation and maintenance, safety, effectiveness, and the like. The method is suitable for the ships in various types.

Description

technical field [0001] The invention relates to a composite ship domestic sewage treatment method. Background technique [0002] With the unprecedented development of the shipping industry and marine development, the pollution of the marine environment is becoming more and more serious, and human beings are paying more and more attention to the protection of the marine environment. The problem of domestic sewage pollution caused by shipping has gradually attracted people's attention. As a means of transportation in shipping, ships are a source of mobile pollution. The impact of domestic sewage discharge from ships on oceans and inland rivers cannot be ignored as the number of ships increases. [0003] According to the 2006 resolution of MEPC. 159. (55), the "Revised Guidelines for the Implementation of Effluent Standards and Performance Tests of Domestic Sewage Treatment Plants" formulated by the International Maritime Organization (IMO) was implemented on January 1, 2010. ...

AI Technical Summary

Problems solved by technology

[0007] (1) The processing device is bulky;

[0008] (2) Unable to handle gray water;

[0009] (3) Treatment of domestic sewage Sewage cannot be treated without bacteria. Bacteria must be cultivated correctly.

[0011] (4) It is impossible to start the shipment at any time. Once the ship docks, the amount of sewage is insufficient, which will lead to decomposed sewage as the main source of pollution.

[0013] (5) Additional chemical disinfectants are required, not only occupying an area, but also dangerous to store on board;

[0014] (6) It cannot adapt to the impact of relatively large changes in water quantity and water quality;

[0021] After entering the electrolytic tank, it is easy to cause blockage of the electrolytic tank and cause a short circuit, which requires frequent cleaning

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