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Leather waste water treatment system and treatment process

A leather wastewater treatment system technology, applied in animal processing wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as powerlessness, and achieve waste reduction, small footprint, and high efficiency high effect

Active Publication Date: 2013-07-31
XIHUA UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the COD and ammonia nitrogen substances that exist in large quantities in leather wastewater, conventional physical and chemical treatment methods are powerless.

Method used

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  • Leather waste water treatment system and treatment process

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:

[0022] Such as figure 1 As shown, the leather wastewater treatment system includes a sludge thickening tank, a sludge dewatering machine and a coarse grid, a fine grid, a grit chamber, an aeration adjustment tank, a coagulation sedimentation tank, an air flotation tank, The sludge outlet of hydrolytic acidification tank, biological selection tank, A / O denitrification tank, secondary sedimentation tank and sand filter tank, grit chamber, coagulation sedimentation tank, air flotation tank, hydrolytic acidification tank and A / O denitrification tank passes through The pipeline is connected to the sludge thickening tank.

[0023] The water outlet of the sludge dehydrator is connected to the aeration regulating tank through a pipeline.

[0024] The sand filter tank is connected to the aeration adjustment...

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Abstract

The invention discloses a leather waste water treatment system, which comprises a sludge thickener, a sludge dewaterer as well as a crude grating, a fine grating, a sand basin, an aeration equalizing tank, a coagulation sedimentation basin, an air floatation pool, a hydrolysis-acidification pool, a biological selection pool, an A / O nitrogen removing pool, a secondary sedimentation pool and a sand filtering pool which are connected by pipelines, sludge outlets of the sand basin, the coagulation sedimentation basin, the air floatation pool, the hydrolysis-acidification pool and the A / O nitrogen removing pool are connected by pipelines for connecting a sludge thickener; the invention also discloses a treatment process employing the leather waste water treatment system. The invention has the beneficial effects that ammonia nitrogen in the leather waste water converts into nitrate, thereby promoting utilization of nutrients in water by microorganism, and realizing high efficiency reduction of ammonia nitrogen and COD in leather waste water; the invention has the advantages of high waste water purifying capability, high efficiency and small land occupation area, and the waste water after treatment can reach the reuse water quality standard for reuse, thereby realizing the cyclic utilization of water after treatment and reducing waste of water resource.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a leather wastewater treatment system. Background technique [0002] With the rapid development of the leather industry in recent years, leather wastewater has become one of the important sources of pollution. According to statistics, there are currently more than 20,000 large, medium and small tanneries in my country, and the annual wastewater discharge volume reaches 80-120 million tons, accounting for about 0.3% of the total industrial wastewater in the country. The amount of Cr discharged in these wastewaters is about 3,500 tons, suspended solids are 120,000 tons, COD is 180,000 tons, BOD is 70,000 tons, and ammonia nitrogen is 100,000 tons. With the development of economy and society and the improvement of people's requirements for environmental protection, the treatment of leather wastewater has attracted more and more attention. The wastewater generated in t...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/24
Inventor 李明元龙吉海马力向文良饶瑜张庆常伟周巍熹张友华胡怀容唐萍鲜欣言
Owner XIHUA UNIV
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