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Wastewater treating and recycling process

A wastewater treatment and wastewater technology, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. And other issues

Active Publication Date: 2009-07-08
ENN ENVIROTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this process is also used to treat dimethyl ether production wastewater, the dimethyl ether production process is different, and the characteristics of the wastewater produced are quite different.

Method used

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  • Wastewater treating and recycling process
  • Wastewater treating and recycling process

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Experimental program
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Embodiment Construction

[0027] See figure 1 The process flow of the present invention is: the production wastewater 21 first enters the grease trap 22 to remove some oil-like side reaction products, and protect the subsequent biochemical treatment system. The wastewater enters the first biochemical reactor 23 by gravity, and the first biochemical reaction is used The high-concentration activated sludge in the device 23 removes most of the organic matter. Due to the large amount of sludge, it has strong impact resistance to the raw water, and the self-circulating sludge has better activity and higher sludge load. The effluent treated by the first biochemical reactor 23 enters the second biochemical reactor 24 by gravity. In the second biochemical reactor 24, the microorganisms on the activated sludge or biological carrier (such as biological activated carbon, fly ash, etc.) are in a nutrient-poor state, the sludge load is lower than the previous stage, and the sludge sedimentation performance Good, the w...

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Abstract

The invention relates to a method for treating dimethyl ether production waste water, which comprises the following main steps: after the dimethyl ether production waste water is treated through oil removal, carrying out secondary biochemical treatment successively, and then filtering, sterilizing and recycling the supernatant fluid for production after coagulating sedimentation. By adopting a running mode of connecting biochemical treatment units in series, the method ensures high quality of yielding water.

Description

Technical field [0001] The invention belongs to the technical field of wastewater treatment, and is a treatment process for the treatment of production wastewater produced by methanol gas phase solid catalyst to produce dimethyl ether and reuse it for industrial cooling circulating water make-up water. It can also be used for the reuse treatment of similar sewage and Deep processing. Background technique [0002] An important development trend of wastewater treatment is the recycling of wastewater. Water shortage is a long-term problem. China's water resources are already in short supply. With the development of the economy, the demand for water is increasing. Wastewater treatment is reused. It is the only way to alleviate the shortage of water resources. The wastewater reuse standard is higher than the general discharge standard. The latest national "Industrial Circulating Cooling Water Treatment Design Code" GB50050-2007 puts forward clear requirements for reclaimed water as su...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/40C02F1/52C02F1/50
Inventor 于振生李金来张宝库雷金环
Owner ENN ENVIROTECH CO LTD
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