Deep treatment method of synthetic rubber wastewater

Abstract

The invention discloses a deep treatment method of synthetic rubber wastewater. The method comprises: a) treating the synthetic rubber wastewater subjected to two-stage biochemical treatment by a multi-media filter; b) treating the discharged water of step a) with a fixed-bed three-dimensional electrode electrolyzing device; c) treating the discharged water of step b) with a precision filter; d) treating the discharged water of step c) with an ultrafiltration system employing total filtration; e) treating the discharged water of step d) with a security filter; and f) treating the discharged water of step e) with a reverse osmosis membrane system. By adopting the process provided in the invention to treat wastewater, the organic matter content and suspended matters in the wastewater can be effectively reduced, and the discharged water can have excellent quality. Membrane fouling can be effectively reduced so as to make the whole system stably operate for a long time, thus reaching the dual purposes of water saving and emission reduction. Also, the environmental benefits, economic benefits and social benefits of enterprises are enhanced.

Description

Technical field [0001] The invention relates to a method for treating organic chemical wastewater, and more specifically to a method for advanced treatment and reuse of organic chemical wastewater after secondary biochemical treatment. Background technique [0002] Synthetic rubber is polymerized with petrochemical intermediate products as raw materials, and its production wastewater has the characteristics of large discharge, complex water quality, high organic content, poor biodegradability, and difficult treatment. [0003] At present, the treatment of synthetic rubber production wastewater basically uses a combination of pretreatment and biochemical treatment. The research and development of related technologies also focuses on how to improve the efficiency of pretreatment and biochemical treatment. At present, the pretreatment measures for synthetic rubber production wastewater mainly include coagulation sedimentation, coagulation air flotation, electrolytic flocculation, cata...

AI Technical Summary

Problems solved by technology

Judging from the current engineering practice of most synthetic rubber production wastewater treatment, although the combination of pretreatment and biochemical treatment can indeed significantly remove pollutants in wastewater, with the improvement of discharge standards in various places, There are some non-biodegradable substances in the wastewater, which cannot be further removed by biochemical methods to reduce the content of organic matter, resulting in the pressure of biochemical treatment of effluent to meet the standards, and sometimes even fail to meet the standards

[0004] In the prior art, someone in the patent proposed an advanced treatment method of using hydrogen peroxide as the oxidant and ferrous sulfate as the catalyst to treat the wastewater after the secondary biochemical treatment, adjust the pH value, and separate the slag and water. This treatment method can Converting organic pollutants in wastewater into titanium dioxide and water can effectively further reduce the TOC and COD values ​​of wastewater, but this treatment method has a relatively long treatment process and requires the addition of a variety of reagents, high treatment costs, and in the effluent Introduced iron ions, causing secondary pollution

[0005] In addition, someone proposed an advanced treatment and reuse process for neoprene rubber industrial wastewater including four steps of coagulation sedimentation treatment, multi-media filtration treatment, ultrafiltration treatment and reverse osmosis treatment, which can remove pollutants and salt in water , but this process does not involve the further reduction of TOC in the wastewater, and the process needs to adjust the pH value of the wastewater several times

In addition, when only multi-media filtration is used in the process, the filtration precision is not high enough, which affects the stable operation of subsequent ultrafiltration and reverse osmosis treatment

[0006] In terms of practical technology, there is basically a blank in the advanced treatment and reuse of synthetic rubber wastewater after secondary biochemical treatment. The methods disclosed in the prior art still have problems such as unsatisfactory treatment efficiency, high treatment costs, and There are many constraints such as secondary pollution and unstable treatment effect, making it difficult to realize industrial application

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