Biochemical treatment device and method for wastewater generated in production of polyester resin

Abstract

The invention discloses a biochemical treatment device and for wastewater generated in production of polyester resin. The biochemical treatment device comprises an oil separator, a service reservoir, an internal circulating supporter-reinforced anaerobic jar, a biological contact oxidation pond, a facultative tank, an internal circulating anaerobic fluidized bed reactor, a membrane biological reactor (MBR) reaction tank, a clean-water reservoir, an automatic control device and a computer. The biochemical treatment device selectively degrades toxic organic matters in the polyester resin production wastewater through various treatment units, so as to greatly improve biochemical treatability of non-biodegradable organic matters, and the biochemical treatment device regulates and controls various functional microorganisms to synergistically degrade high-concentration toxic and harmful organic matters; meanwhile, the biochemical treatment device regulates water quality and quantity as well as sludge by virtue of the various treatment units, so as to provide the optimal growth condition for microorganisms having different functions and realize standard treatment of various pollutants of the wastewater. The biochemical treatment device is high in automation degree, convenient to manage, adapted to large fluctuation of water quality, stable and reliable in treatment effect, and can treat non-degradable biochemical wastewater.

Description

technical field [0001] The invention relates to a polyester resin production wastewater biochemical treatment device and a treatment method thereof, and belongs to the technical field of refractory biodegradable chemical wastewater treatment. Background technique [0002] Polyester resin is a general term for polymer compounds formed by polycondensation of diols or dibasic acids or polyols and polybasic acids. It has the characteristics of chemical corrosion resistance, excellent mechanical properties and electrical properties, and can be cured at room temperature and pressure. It is widely used in Industry, agriculture, transportation and transportation and other fields. With the continuous strengthening of infrastructure construction and the vigorous expansion of other consumption fields, the output and demand of unsaturated polyester resin in China are gradually increasing. Since 2001, the output of unsaturated polyester resin in my country has maintained an average grow...

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Problems solved by technology

However, these processes are costly to operate and in most cases cause secondary pollution to the environment. For example, the coagulation and sedimentation method will produce a large amount of physical and chemical sludge, the ozone oxidation technology has high energy consumption and extremely low ozone utilization efficiency, and the Fenton oxidation operation High cost and high effluent color, so these are not the best treatment options for polyester resin wastewater

At present, most domestic polyester resin production enterprises have problems such as too long treatment process, high investment and operating costs, high energy consumption, low unit treatment load, and unstable effluent water quality in the wastewater treatment process of most domestic polyester resin production enterprises. It is necessary to develop An efficient, stable and low-cost treatment process adapted to the characteristics of polyester resin production wastewater, solving wastewater treatment problems for polyester resin manufacturers

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