Denitrification device for ship household sewage treatment

Abstract

The invention discloses a denitrification device for ship household sewage treatment. The device is characterized by being composed of a receiving tank, a crushing pump, a pipeline mixer, an electrolysis unit and a discharge tank which are connected in series successively; the inlet of the pipeline mixer is connected to a seawater pump which is connected in parallel to the crushing pump; a dosing pump and a dosing tank are arranged on the discharge tank. Compared with the prior art, the device disclosed by the invention is compact in structure, small in equipment size, high in electrolytic efficiency, good in denitrification effect, simple to start and stop, high in water quality and quantity adaptive capacity, safe and efficient to operate and low in treatment cost, and is in particular suitable for household sewage treatment of various types of ships.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a denitrification device for domestic sewage treatment of ships or islands. Background technique [0002] With the development of the world economy, problems such as the pollution of the earth's water environment, eutrophication of water quality, and water conservation have become increasingly prominent. More and more countries and regions have formulated strict sewage discharge standards in order to protect the environment of rivers, lakes, oceans and other waters. . In recent years, with the development of the shipping industry, the environmental pollution of ships as a flow source, especially the impact on the water environment quality of sensitive areas (such as water sources, nature reserves, etc.), is gradually receiving people's attention. In 2012, the International Maritime Organization (IMO), on the basis of the published MARPOL73 / 78 Annex IV - Rules for the Pr...

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Problems solved by technology

[0003] The problems existing in the existing technology are: the residence time of the biochemical method is long, the volume of the treatment device is large, a certain amount of activated sludge suitable for this type of water quality needs to be cultivated, the operator should have professional knowledge, and it is difficult to open and close. If the operation is stopped for a long time, the activated sludge needs to be cultivated again when restarting. The impact resistance to large changes in water quality and water volume is poor, and odorous substances will be produced during the biochemical process. It is necessary to regularly clean the treatment device and add chemical disinfectants and medicaments. inconvenient storage

Although the residence time of electrochemical treatment is short, the degree of mixing is not sufficient, which reduces the efficiency of pollutant removal, and cannot meet the latest IMO discharge standards for domestic sewage from ships and the requirements for stable and reliable operation.

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