Biological treatment method for wastewater of containing acrylics and esters

A biological treatment, acrylic acid technology, applied in the direction of aerobic and anaerobic process treatment, etc., can solve the problems of high cost per ton of treated wastewater, unusable, high energy consumption, etc., and achieve the effect of reducing treatment costs, reducing energy consumption, and low energy consumption

Inactive Publication Date: 2005-03-30
北京东方石油化工有限公司
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AI Technical Summary

Problems solved by technology

[0010] Catalysts have special requirements for wastewater quality: the wastewater contains inorganic ions (Na, Ca, Fe, etc.) must be less than 20mg / l, otherwise the catalyst will be permanently poisoned and cannot be used
[0011] At present, this process is only applied to the wastewater from the process of propylene oxidation to produce acrylic acid, and cannot be used in the wastewater from the production of acrylic acid (methacrylic acid) esters.
[0012] This process belongs to high temperature, high pressure, and uses heavy metal catalyst, which requires complex equipment and operation process, relatively high energy consumption, and high cost per ton of treated wastewater
[0013] The above two methods reduce the competitiveness of the enterprise and are not conducive to the sustainable development of the enterprise due to the complex process, high equipment performance, high energy consumption, and high processing cost per ton.

Method used

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Embodiment Construction

[0029] Below in conjunction with example the present invention is described in further detail.

[0030] The technical scheme adopted by this invention to solve its technical problems is mainly divided into three steps: the first step is to carry out uniform conditioning and tempering of high-concentration organic chemical wastewater (COD>30000mg / l), neutralize with acid or alkali, and control the pH value Between 6.5 and 7.5, add microbial culture medium (the culture medium is prepared according to the composition of trace elements in microbial cells in anaerobic granular sludge, containing nitrogen, phosphorus, potassium, cobalt, nickel and growth factors required for microbial growth, etc.). Enter the conventional acidification hydrolysis tank at normal temperature (generally lower than 40°C) or high temperature (50-70°C). Under anaerobic / facultative conditions, macromolecular substances in high-concentration organic wastewater are decomposed into Small molecular substances,...

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Abstract

The characteristics are following steps: 1. proceeding acidate hydrolyzation to waste water; 2. proceeding anaerobic biologic treatment to acidate hydrolyzed waste water by utilizing anaerobic biologic treater; 3. proceeding aerobic biologic treaterment to waste water by utilizing aerobic biologic treater. By the invention, high-density organic waste water is treated by modern biologic treating technology to achieve discharging requirement.

Description

technical field [0001] The invention relates to a treatment technology for high-concentration organic chemical wastewater, in particular to a biological treatment method for acrylic acid and its ester wastewater. Background technique [0002] The waste water incineration device is currently the mainstream device for treating high-concentration acrylic acid (methacrylic acid) and its ester wastewater at home and abroad, and the catalytic wet oxidation device is still in the pilot test stage. These two sets of equipment have excellent treatment effect, but high energy consumption. [0003] (1) Wastewater incineration device. [0004] The acidic wastewater and alkaline wastewater produced by acrylic acid (methacrylic acid) and its esters production equipment are stored separately, mixed in the neutralization tank after preheating, and neutralized with sodium hydroxide, and the neutralized wastewater is heated and enters the distillation tower. Use steam to heat and concentrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 李宗轩张振友孙立光伍卫红
Owner 北京东方石油化工有限公司
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