Plasma sewage purification device

Abstract

The invention discloses a plasma sewage purification device. The plasma sewage purification device comprises a plasma unit, a deaminizing and nitrate nitrogen-removing unit and a coagulating and precipitating filtering unit, wherein the plasma unit, the deaminizing and nitrate nitrogen-removing unit and the coagulating and precipitating filtering unit are sequentially connected. Sewage is treatedby the plasma unit, then flows through a deaminizing tank and a nitrate nitrogen-reducing tank in the deaminizing and nitrate nitrogen-removing unit, encounters a hydrogen reduction reaction in the nitrate nitrogen-reducing tank, then flows into the coagulating and precipitating filtering unit, and is filtered to remove total phosphorus, COD, BOD and SS in water, so that main water quality indexesafter deep treatment reach relevant water quality standards of the Surface Water Environmental Quality Standard and wastewater recycling is achieved.

Description

technical field [0001] The invention relates to the technical field of sewage purification, in particular to a plasma sewage purification device. Background technique [0002] The relatively mature sewage treatment process of existing municipal sewage treatment plants is: water inflow→grid filtration→primary sedimentation tank→biochemical treatment→secondary sedimentation tank→disinfection tank→effluent, which can only meet the "Urban Wastewater Treatment Plant Pollutant Discharge Standard" 》(GB18918-2002) Class B standard effluent indicators, the indicators are shown in Table 1: [0003] Table 1 The maximum allowable emission concentration of basic control items (daily average value) [0004] [0005] However, most of the effluent of the sewage treatment process of the existing municipal sewage treatment plants can only meet the first-class B standard, which cannot meet the requirements of the existing standards. As far as the existing technology is concerned, ammonia ...

AI Technical Summary

Problems solved by technology

[0008] "Level 1 B(A) effluent from secondary settling tank + phosphorus removal by coagulation and sedimentation + biological denitrification (such as biological filter or denitrification deep bed filter)" can effectively remove ammonia nitrogen and total nitrogen in water, but there are three Defects: (1) When the temperature is low in winter and the water temperature is low, the removal effect of ammonia nitrogen and total nitrogen is significantly reduced, and the water quality requirements cannot be met (ammonia nitrogen≦1.5mg / L, total nitrogen≦10mg / L); (2) denitrification and denitrification (such as biological filter or denitrification deep bed filter) occupies a large area; (3) the carbon source must be continuously replenished during operation, resulting in high operating costs

[0009] "Secondary settling tank level B (A) effluent + coagulation sedimentation phosphorus removal + MBR" has poor removal effect on ammonia nitrogen and total nitrogen in winter, cannot meet the requirements for ammonia nitrogen and total nitrogen, and occupies a large area

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