Biological treatment method for wastewater of containing acrylics and esters

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...

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.