Fine chemical wastewater treatment and reuse method

A technology for fine chemical wastewater and aerobic treatment, applied in the field of chemical treatment, can solve the problems of high operating cost of oxidation process, poor biodegradability of wastewater, and many biodegradable substances, and achieve good economic and environmental benefits, maintainable Strong performance and good processing effect

Inactive Publication Date: 2013-06-19
HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] (1) The composition of wastewater is complex, mainly due to the diversity of production raw materials and production processes;
[0015] (2) The concentration of pollutants in wastewater is high, and some wastewater has high salt content;
[0016] (3) The content of colored substances is high and there are many types, resulting in high chroma of wastewater;
[0017] (4) There are many biodegradable substances, and the biodegradability of wastewater is poor;
[0018] (5) There are many toxic and harmful substances, which have different degrees of poisonous effects on microorganisms and affect the effect of biochemical treatment
The oxidation process has high operating costs and complicated management, so it is rarely used at present

Method used

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Experimental program
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Effect test

Embodiment 1

[0065] The invention provides a fine chemical wastewater treatment and reuse method based on membrane bioreactor (MBR)-reverse osmosis (RO) combined technology, which mainly includes the following processing steps:

[0066] (1) The fine chemical wastewater is treated through oil separation, air flotation, coagulation and sedimentation; the oil separation tank in this embodiment mainly includes functional areas for dosing and demulsification, and the air flotation functional area can also be included in the separation In the oil pool; the coagulation sedimentation tank is divided into three functional areas: mixing, reaction and sedimentation. The coagulants PAC and PAM are added in the mixing area. After coagulation and sedimentation, most of the insoluble pollutants and a small amount of soluble matter in the wastewater are eliminated remove.

[0067] (2) The effluent of coagulation sedimentation enters the hydrolysis treatment system. In the hydrolysis treatment system, ther...

Embodiment 2

[0071] In this embodiment, the same operation steps as in Embodiment 1 are adopted, that is, a method for treating and reusing fine chemical wastewater, comprising the following steps:

[0072] (1) Fine chemical wastewater is treated through oil separation, air flotation, coagulation and sedimentation;

[0073] (2) The effluent of coagulation sedimentation enters the hydrolysis treatment system. In the hydrolysis treatment system, there are anaerobic microbial extracellular enzymes. Biodegradation of organic matter, reducing the organic load while improving the biodegradability of wastewater;

[0074] (3) The effluent of the hydrolysis treatment system enters the aerobic treatment system, and there are aerobic microorganisms in the aerobic treatment system, which are used to decompose organic matter into end products;

[0075] The waste water from the aerobic treatment system in step (3) enters the MBR system for further aerobic treatment, and at the same time separates the m...

Embodiment 3

[0080] Adopt the same operating procedure of embodiment 1 in the present embodiment, and with the material identical with embodiment 1, process through following steps:

[0081] The concrete index of the pollutant that adopts in the present embodiment is as follows:

[0082]

[0083] (1) Fine chemical wastewater is treated through oil separation, air flotation, coagulation and sedimentation; oil, suspended solids and soluble substances in the adsorption state are removed from the wastewater, reducing the load on the subsequent treatment system;

[0084] (2) The effluent of coagulation sedimentation enters the hydrolysis treatment system. In the hydrolysis treatment system, there are anaerobic microbial extracellular enzymes. Biodegradation of organic matter, reducing the organic load while improving the biodegradability of wastewater;

[0085] (3) The effluent of the hydrolysis treatment system enters the aerobic treatment system. There are aerobic microorganisms in the ae...

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Abstract

The invention discloses a chemical treatment method and specifically relates to a fine chemical wastewater treatment and reuse method based on a membrane bioreactor (MBR)-reverse osmosis (RO) combination technology. The method disclosed by the invention comprises the following steps: performing oil separation, air floatation and coagulative precipitation on wastewater drained from a production workshop, then performing decomposition through an extracellular enzyme of anaerobic microorganisms in a hydrolysis treatment system, further entering an aerobic treatment system with aerobic microorganisms, further enabling the wastewater from the aerobic treatment system to enter an MBR system to perform further aerobic treatment, simultaneously performing mud-water separation, directly enabling water from the MBR system to enter an RO system, reusing the water produced by the RO system in production, and draining concentrated water into a pipeline network in a park. The method disclosed by the invention has the advantages of combining MBR with RO, improving the biochemical treatment effect of the system, further improving the recovery rate of the RO system, increasing the yield of pure water and reducing the discharge amount of the wastewater. The method has the advantages of short process flow of the system, high degree of automation, simplicity and convenience in operation and stability in operation.

Description

technical field [0001] The invention relates to a chemical treatment method, in particular to a fine chemical wastewater treatment and reuse method based on membrane bioreactor (MBR)-reverse osmosis (RO) combined technology. Background technique [0002] Membrane bioreactor (MBR) is a new type of wastewater treatment technology that organically combines biological treatment technology and high-efficiency membrane separation technology. It has been more and more widely used in the fields of municipal sewage treatment and industrial wastewater treatment. [0003] Hollow fiber submerged MBR is a membrane system in which hollow fiber membrane modules are submerged in sewage and operated by negative pressure suction. Membrane materials commonly used in industry include PVDF, PP, PES, etc., and the membrane pore size ranges from microfiltration level to ultrafiltration level. Due to the small pore size of the membrane, the suspended matter is almost completely intercepted, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 谢柏明丁国良赵经纬邱晖鲁大政张锋谭斌王伟
Owner HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
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