Electrochemical system for treating ship domestic sewage

Abstract

The invention provides an electrochemical system for treating ship domestic sewage. The electrochemical system comprises a sewage storage box (2), a first-grade electrolytic tank (3), a second-grade electrolytic tank (4), a membrane filtering tank (5), a combustion furnace (12) and an electric control device (1), which are connected in sequence, wherein the electric control device is used for controlling a liquid level control switch (7), power supplies of the first-grade electrolytic tank and the second-grade electrolytic tank, and a slag scraping machine (13) to operate; the second-grade electrolytic tank is internally provided with the slag scraping machine (13) and a precipitation device of an inclined plate or inclined pipe (8); a mud discharging bucket (9) is arranged below the inclined plate or the inclined pipe; flocculated residues collected by the slag scraping machine (13) and the mud discharging bucket (9), and solid particles filtered by a fine grid (6) in the sewage storage box are conveyed to the combustion furnace (12) connected with the slag scraping machine (13) and the mud discharging bucket (9) and the sewage storage box. The electrochemical system provided by the invention can be used for treating COD (Chemical Oxygen Demand), ammonia nitrogen, TN (Total Nitrogen) and TP (Total Phosphorus) in sewage to reach conference standards and has the advantages of high treatment efficiency, simplicity in operation, small occupied area and impact load resistance and the like.

Description

technical field [0001] The invention relates to a domestic sewage treatment device, in particular to an electrochemical system for treating ship domestic sewage. Background technique [0002] As an important means of transportation, ships not only create economic value, but also bring great challenges to the ecological environment of water bodies. Usually, the waste water and waste discharged from ship toilets, medical rooms, and places where live animals are loaded are called "black water", that is, domestic sewage. [0003] Ship domestic sewage contains a large amount of microorganisms, organic matter, nitrogen and phosphorus, and frequent entry into natural water will cause great harm: (1) A large amount of domestic sewage is discharged into the water body, organic matter is degraded by microorganisms, resulting in oxygen deficiency, which destroys the marine climate environment, Force marine animals such as fish to die or migrate. (2) The pollution degree of wastewater...

AI Technical Summary

Problems solved by technology

[0003] Ship domestic sewage contains a large amount of microorganisms, organic matter, nitrogen and phosphorus, and frequent entry into natural water will cause great harm: (1) A large amount of domestic sewage is discharged into the water body, organic matter is degraded by microorganisms, resulting in oxygen deficiency, which destroys the marine climate environment, Force marine animals such as fish to die or migrate

(2) The pollution of wastewater is very high. If it is directly discharged into the water area, it will affect the self-purification ability of the water, thereby changing the entire ecological characteristics of the water area.

[0007] Electrocatalytic technology is divided into two parts: electrocatalytic oxidation and electrocatalytic reduction. Electrocatalytic oxidation indirectly oxidizes organic pollutants in water through direct oxidation of the anode and the generated hydroxyl radicals, ozone and active chlorine; while electrocatalytic reduction is through The direct reduction of the cathode and the reduced hydrogen generated indirectly reduce the reducing substances in the water. Electrocatalytic reduction is now commonly used to treat nitrate ions in groundwater. However, conventional electrode materials are used, due to their N 2 The selectivity is low, resulting in low treatment effect

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