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High-concentration integrated chemical organic wastewater treatment process

A high-concentration technology for organic wastewater treatment, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as huge investment, achieve low operating costs, reduce consumption, The effect of improving biodegradability

Inactive Publication Date: 2012-07-18
NINGBO UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0008] Biochemical treatment is currently the core of this type of wastewater treatment. The amount of biochemical treatment facilities, investment and floor area occupy a major position in the total process facilities of this type of wastewater treatment. Therefore, to effectively treat this type of wastewater and make it discharge up to the standard, only To upgrade and transform the existing wastewater treatment process, its basic core facilities and processes cannot be changed, otherwise the investment will be huge, which is almost equivalent to rebuilding a wastewater treatment plant

Method used

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  • High-concentration integrated chemical organic wastewater treatment process
  • High-concentration integrated chemical organic wastewater treatment process

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Embodiment

[0032] Example: This test uses figure 1 For the wastewater treatment process shown, comprehensive chemical wastewater from a sewage treatment plant in a chemical park in Ningbo was selected as the test object. The specific treatment process is as follows: the wastewater passes through the grid to remove part of the suspended matter and enters the adjustment tank, and then enters the air flotation tank. According to the wastewater quality, 50~150mg / L ferrate solid is added for oxidation pretreatment, and then 0.1% is added. Concentration of flocculant PAM, the slag and sludge produced by precipitation are transferred to the sludge thickening tank, the sewage enters the hydrolysis acidification tank for anaerobic biological treatment, and the sewage from the hydrolysis acidification tank enters the aerobic tank for good Oxygen biological treatment to further remove the organic matter in sewage. After aerobic treatment, the sewage is precipitated in the secondary sedimentation tan...

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Abstract

The invention discloses a high-concentration integrated chemical organic wastewater treatment process, which comprises a pre-oxidation and physical chemical treatment unit, a biochemical treatment unit, a post-oxidation and physical chemical treatment unit and a sludge dewatering unit. Ferrate for oxidization is added in pre-physical chemical pre-treatment and is used for oxidizing organic matters in wastewater in a floatation tank, so that the content of difficult-to-biodegrade substances is reduced, the biodegradability of the wastewater is improved, and the air floatation physical chemical treatment efficacy is enhanced. In the post-oxidation and physical chemical treatment unit and, through the oxidization of the ferrate in a coagulation reaction tank, organic matters, chromaticity and SS (Standard Specification) remaining in the wastewater are further removed, and the physical chemical treatment efficacy is enhanced. The process is improved on the basis of the existing wastewater processing process, the original biochemical unit is unchanged, the equipment is simple, the investment is less, the operation management is convenient, and the operation cost is low. The water quality of outlet water of the process can stably reach primary standard of Integrated Wastewater Discharge Standard (GB8978-1996), and the process is suitable for treating wastewater of chemical industry parks and enterprises.

Description

Technical field [0001] The invention relates to a process for processing industrial wastewater, in particular to a process for processing high-concentration comprehensive chemical organic wastewater. Background technique [0002] The petrochemical industry is one of the pillar industries of our country, which not only brings huge economic benefits to the national economy, but also puts tremendous pressure on environmental protection. Especially in recent years, the pollution of toxic organic matter in the water body has been increasing, which is closely related to the rapid development of the petrochemical industry and the discharge of a large amount of organic chemical wastewater. The construction of chemical industrial parks is a new model for the development of China’s chemical industrial clusters in recent years. Over the past ten years, more than 60 new chemical parks have been approved by the People’s Government at or above the provincial level in China. The construction of...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 叶芬霞刘新文李颖
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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