Method of treating bilge water by combining Fenton's reagent with potassium hydrogen persulfate and microorganism

A technology of potassium hydrogen persulfate and Fenton reagent, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. research, marine pollution and other issues, to achieve the effect of strong pertinence, saving treatment costs and equipment running time, and increasing oxidation efficiency

Active Publication Date: 2016-01-27
OCEAN UNIV OF CHINA
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Problems solved by technology

However, after the oil-water separation treatment of bilge water, its high nutrient salt and high COD properties have not been fundamentally changed. If it is directly discharged into the sea, it will still cause extremely serious marine pollution.
At present, there is no special national standard for bilge water discharge, and there is no systematic research on the removal of nutrients and COD in bilge water

Method used

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  • Method of treating bilge water by combining Fenton's reagent with potassium hydrogen persulfate and microorganism
  • Method of treating bilge water by combining Fenton's reagent with potassium hydrogen persulfate and microorganism
  • Method of treating bilge water by combining Fenton's reagent with potassium hydrogen persulfate and microorganism

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Embodiment 1

[0060] In this example, the bilge water after preliminary oil-water separation is the object to be treated. Bilge water COD Mn The content is 963mg / L, and the pH is 7.20. In Fenton's reagent, the mass concentration of hydrogen peroxide is 30%, and ferrous sulfate is prepared as an aqueous solution. Potassium hydrogen persulfate is a solid powder. The experiment was divided into five groups, which were dosed at 1 to 5 times the theoretical dose of Fenton's reagent. After the reaction is completed, the COD in the water is determined by analysis Mn And the content of ammonia nitrogen, the removal efficiency of reducing substances such as organic matter in the bilge water was evaluated. The results are shown in Table 1. From the data in the table, it can be seen that after three Fenton’s reagent oxidation reactions, the theoretical dosage of Fenton’s reagent is 2-5 times the bilge water COD Mn The removal effect is the best and the difference is less than 5%, and the ammonia nitr...

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Abstract

A method of treating bilge water by combining Fenton's reagent with potassium hydrogen persulfate and microorganism includes the steps of (1) regulating pH of bilge water to 2 to 4, adding Fenton's reagent to perform oxidation treatment, regulating pH to be larger than 7 after reaction, and standing to remove precipitation, wherein oxidation treatment by Fenton's reagent can be repeated; (2) regulating pH of the bilge water oxidized through Fenton's reagent to be smaller than 7, adding potassium hydrogen persulfate, and reacting 1 to 2h at the temperature of 50 to 60 DEG C; (3) adding microorganism liquid to react for 24 to 72h so as to remove ammonia nitrogen in water. The method is special for purification treatment on bilge water, is simple in technological operation and has good decontamination effect on bilge water. Besides, no extra catalysts are needed to be added during reaction, the reaction rate is high, bilge water can be treated into a low-pollution, dischargeable and even recyclable water resource, and the method fills in the blank of bilge water treatment of ships at present.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a method for jointly treating bilge water with Fenton's reagent, potassium hydrogen persulfate and microorganisms. Background technique [0002] Bilge water is a kind of water formed in the bilge of the ship due to leakage of the outer panel, insufficient watertightness of the hatch cover, leakage of the pipeline, infiltration of flushing water, damage to the ship, and fire fighting. The bilge water must be removed in time to prevent corrosion of the hull structure and prevent the cargo from being damp and deteriorated. It usually contains oil, and is characterized by high nutrients and high chemical oxygen demand (COD). Therefore, if it is directly discharged, it will inevitably cause pollution of the marine environment. In recent years, my country’s maritime authorities have increased the supervision of ship bilge water discharge. However, for the incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 梁皓瑞丁海兵王勇杨敬民孙承君
Owner OCEAN UNIV OF CHINA
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