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Tanning synthetic wastewater treatment system and treatment method

A technology for treating system and comprehensive wastewater, applied in animal processing wastewater treatment, special compound water treatment, multi-stage water treatment, etc., can solve the problems of effluent COD not being able to meet the standard stably, effluent TN not being able to meet the standard discharge stably, and high energy consumption.

Inactive Publication Date: 2016-08-03
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the effluent of the traditional tannery comprehensive wastewater treatment method is generally difficult to stably meet the effluent water quality required by the new discharge standard, especially the discharge limit requirements of the new standard for effluent COD and TN
Aiming at the existing problems of high energy consumption, large amount of mud production, effluent TN that cannot be discharged up to the standard in the existing tannery wastewater treatment device or method, the present invention adopts the biochemical treatment method represented by UASB and UDNSB to first treat the tannery comprehensive wastewater Then, in view of the problem that the effluent COD of the existing tannery wastewater treatment device or method cannot be stably up to the standard, the advanced treatment method with Fenton oxidation as the core is adopted to carry out advanced treatment of the above-mentioned biochemical treatment effluent

Method used

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  • Tanning synthetic wastewater treatment system and treatment method
  • Tanning synthetic wastewater treatment system and treatment method
  • Tanning synthetic wastewater treatment system and treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0174] 1. Wastewater pretreatment

[0175] The tannery comprehensive wastewater from a sewage plant in a tannery area in Hebei Province was introduced into the regulating tank, and the acidic regulator sulfuric acid was added at the same time, and stirred evenly, so that the pH of the wastewater in the regulating pond was 7; and the alkali regulating agent (bicarbonate Sodium), the alkalinity is supplemented to 1000mg / L, and the mixer stirs evenly;

[0176] 2. Anaerobic treatment

[0177] By connecting the pipeline and the sewage pump installed on the pipeline, the pretreated and mixed wastewater in the regulating tank is introduced into the anaerobic tank for anaerobic treatment, and the hydraulic retention time in the anaerobic tank is controlled to 10h, so that the concentration of volatile fatty acids in the effluent of the anaerobic tank is ≤ 800mg / L;

[0178] 3. Pre-aeration treatment

[0179] Pass the effluent after anaerobic treatment into the pre-aeration tank thro...

Embodiment 2

[0200] 1. Wastewater pretreatment

[0201] The tannery comprehensive wastewater from a sewage plant in a tannery area in Xinji City, Hebei Province was introduced into the regulating tank, and the acidic regulator hydrochloric acid was added at the same time, and stirred evenly, so that the pH of the wastewater in the regulating pond was 8; and the alkali regulating agent ( Sodium bicarbonate), the stirrer stirs evenly, and the alkalinity of regulating waste water is 2000mg / L;

[0202] 2. Anaerobic treatment

[0203] By connecting the pipeline and the sewage pump installed on the pipeline, the pretreated and mixed wastewater in the adjustment tank is introduced into the anaerobic tank for anaerobic treatment, and the hydraulic retention time in the anaerobic tank is controlled to 16h, so that the concentration of volatile fatty acids in the effluent of the anaerobic tank is ≤ 900mg / L;

[0204] 3. Pre-aeration treatment

[0205] Pass the effluent after anaerobic treatment in...

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Abstract

The invention discloses a tanning synthetic wastewater treatment system and treatment method, and belongs to the technical field of industrial wastewater treatment. The treatment system comprises a regulating tank, an anaerobic tank, a preaeration tank, a primary sedimentation tank, a first-level denitrification tank, an aerobic tank, a secondary sedimentation tank, a second-level denitrification tank, a coagulative precipitation tank, a Fenton oxidation tank and a biological aerated filter. According to the wastewater treatment method, tanning synthetic wastewater is treated by combining biochemical treatment with deep treatment, the wastewater treatment efficiency is high, and effluent is stable in quality and can be directly drained; in addition, the wastewater treatment cost is significantly reduced, and therefore the method is suitable for large-scale application and popularization and has the wide application prospect.

Description

technical field [0001] The invention relates to a sewage treatment system and a method for treating sewage by using the system, in particular to a comprehensive tannery wastewater treatment system and a method for treating tannery wastewater by using the treatment system, belonging to the technical field of industrial wastewater treatment. Background technique [0002] The tanning industry is a pillar industry in my country's light industry, and it is also a highly polluting industry. The tanning wastewater generated in the production process is one of the most difficult to treat in industrial wastewater. It has large discharge volume, complex components, and poor pollution control. And other issues. According to reports, the annual wastewater discharge of my country's tanning industry has reached 160 million tons, including about 404,000 tons of COD, 16,000 tons of ammonia nitrogen, 220,000 tons of suspended solids, and 15,000 tons of sulfide. The tanning industry has become...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/24
CPCC02F9/00C02F1/56C02F1/66C02F1/722C02F1/74C02F3/30C02F2001/007C02F2103/24C02F2301/08C02F2305/026
Inventor 田秉晖于勇丁然高迎新张昱杨敏
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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