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Biochemical treatment process for paint-producing wastewater

A technology for biochemical treatment and wastewater treatment, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. It can solve the problems of high operation and maintenance costs, consumption of large chemicals, and difficulty in discharging wastewater up to the standard. , to achieve the effect of saving investment and operation costs, energy saving and emission reduction environmental benefits, and reducing disposal costs

Active Publication Date: 2015-12-23
浙江巨能环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coagulation process consumes a large amount of chemicals and produces a large amount of physical and chemical sludge, which has high treatment and disposal costs, and the wastewater after coagulation treatment usually cannot be discharged up to the standard and needs further treatment
Microwave, electrolysis, usually need to adjust pH before and after treatment, consume a lot of chemicals, high operating costs, and also have the problem of difficult discharge of wastewater after treatment
Therefore, the wastewater treatment process has problems such as high operation and maintenance costs, complicated operation, and poor COD value in the physical and chemical (pre) treatment process.

Method used

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  • Biochemical treatment process for paint-producing wastewater
  • Biochemical treatment process for paint-producing wastewater
  • Biochemical treatment process for paint-producing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the waste water first enters the collection tank, and is pumped into the adjustment tank through the lift pump. The pH of the waste water is adjusted to 7.5 by adding liquid alkali, and the COD is adjusted to 20,000 mg / L by adding the effluent of the sedimentation tank. The wastewater from the regulating tank is heated to 35°C and then enters the anaerobic granular sludge bed reactor, the temperature of the wastewater is 35°C, and the load is 5kg / m 3 , The generated biogas is used for heating to generate steam to recover heat energy. The effluent from anaerobic treatment enters the aerobic carrier fluidized bed reaction tank, and the COD load is 1.5kg / m 3 , the dissolved oxygen concentration is 2.5mg / L, and the organic matter in the wastewater is decomposed by the aerobic flow reaction bed. The effluent of the aerobic carrier fluidized bed reaction tank enters the activated sludge tank, and the COD load is 0.8kg / m 3 , the dissolved oxygen c...

Embodiment 2

[0030] Such as figure 1 As shown, the waste water first enters the collection tank, and is pumped into the adjustment tank through the lift pump. The pH of the waste water is adjusted to 7.8 by adding liquid alkali, and the COD is adjusted to 25,000 mg / L by adding the effluent of the sedimentation tank. The wastewater from the regulating tank is heated to 33°C and then enters the anaerobic granular sludge bed reactor, the temperature of the wastewater is 38°C, and the load is 5.5kg / m 3 , The generated biogas is used for heating to generate steam to recover heat energy. The effluent from anaerobic treatment enters the aerobic carrier fluidized bed reaction tank, and the COD load is 1.5kg / m 3 , the dissolved oxygen concentration is 3.0mg / L, and the organic matter in the wastewater is decomposed by the aerobic flow reaction bed. The effluent of the aerobic carrier fluidized bed reaction tank enters the activated sludge tank, and the COD load is 0.8kg / m 3 , the dissolved oxygen...

Embodiment 3

[0034] Such as figure 1 As shown, the waste water first enters the collection tank, and is pumped into the adjustment tank through the lift pump. The pH of the waste water is adjusted to 7.2 by adding liquid alkali, and the COD is adjusted to 30,000 mg / L by adding the effluent of the sedimentation tank. The wastewater from the regulating tank is heated to 40°C and then enters the anaerobic granular sludge bed reactor, the temperature of the wastewater is 38°C, and the load is 6.0kg / m 3 , The generated biogas is used for heating to generate steam to recover heat energy. The effluent from anaerobic treatment enters the aerobic carrier fluidized bed reaction tank, and the COD load is 1.5kg / m 3 , the dissolved oxygen concentration is 2.8mg / L, and the organic matter in the wastewater is decomposed by the aerobic flow reaction bed. The effluent of the aerobic carrier fluidized bed reaction tank enters the activated sludge tank, and the COD load is 0.8kg / m 3 , the dissolved oxygen...

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Abstract

The invention discloses a biochemical treatment process for paint-producing wastewater. The biochemical treatment process for the paint-producing wastewater does not require physiochemical pretreatment and can effectively reduce a COD (chemical oxygen demand) value of the wastewater. The treatment process comprises steps as follows: (1), a pre-adjustment reaction; (2), an anaerobic reaction; (3), a single-stage aerobic reaction; (4), a two-stage aerobic reaction; (5) precipitation. The biochemical treatment process has the characteristics of no need of physiochemical treatment, low treatment cost, high treatment efficiency, good treatment effect and the like.

Description

technical field [0001] The invention belongs to the field of wastewater treatment technology, in particular to a biochemical treatment technology of paint-making wastewater. Background technique [0002] Paint-making wastewater contains high concentrations of refractory organic matter, complex composition, high toxicity, poor biodegradability, and large fluctuations in water quality and quantity. At present, the commonly used treatment technology is a combination of physical and chemical treatment or physical and chemical pre-biochemical treatment. For example, the patent No. 200310122764.x discloses a process for treating organic wastewater. The process steps are: (a) Physicochemical pretreatment: pass the organic wastewater into the micro-electrolysis reduction pool, and make the organic wastewater Iron-carbon micro-electrolysis reaction occurs, hydrogen peroxide is added to the organic wastewater after electrolysis for Fenton oxidation, and then the organic wastewater en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 凌明沈学拯叶国祥郭慧朱颖
Owner 浙江巨能环境工程有限公司