Waste cutting emulsion wastewater treatment system and waste cutting emulsion wastewater treatment method

Abstract

The invention provides a cutting emulsion wastewater treatment system and a cutting emulsion wastewater treatment method. The system comprises an adjusting pool, an oil separation pool, an agent feeding pool, an air floatation unit, a middle pool, a security filter, a catalytic oxidation unit, a middle water pool, a heat exchanger, a UASB reactor, a contact oxidation device, an MBR unit, a clear water pool, a circulating pump and an incineration system. According to the present invention, the system and the method select the active carbon loaded transition metal catalyst, and have characteristics of efficient and stable treatment effect, short reaction time, low chemical sludge yield, no hardening of the filler, low backwash frequency and low filler loss; based on catalytic oxidation, thetoxic and harmful substances in the raw water are subjected to ring opening and chain breaking so as to improve the biodegradability of the wastewater, provide the conditions for the application of the biochemical system, remove the organic pollutants, and reduce the sludge yield of the biochemical system and the investment and operation cost of the subsequent biochemical system; and the system and the method have advantages of strong impact load resistance, high and stable treatment efficiency, low operation cost and no toxic and harmful odor emission, and can be widely used in low-biodegradability and high-concentration organic wastewater treatment.

Description

technical field [0001] The invention specifically relates to a waste cutting emulsion wastewater treatment system and method. Background technique [0002] Cutting fluid is an industrial liquid used to cool and lubricate cutting tools and workpieces during metal cutting, chipping and grinding. Cooling performance, lubricating performance, anti-rust performance, degreasing and cleaning function, anti-corrosion function and other advantages. Cutting fluid is widely used to ensure the quality of processing technology and improve the service life of mechanical equipment and tools. However, during the recycling process, the cutting fluid will gradually deteriorate due to the influence of frictional heat, metal dust and environmental media, resulting in a decrease in its performance. Therefore, the cutting fluid needs to be replaced regularly to form a waste cutting emulsion. [0003] Waste cutting emulsion usually contains mineral oil, animal and vegetable oils, surfactants, ru...

AI Technical Summary

Problems solved by technology

Among them, the "UASB reactor + aerobic combined process" process has the following disadvantages: (1) The anaerobic reactor (UASB reactor) is significantly inhibited by the biological toxicity of toxic and harmful substances in wastewater, unstable in operation, easy to acidify, and pollutant removal efficiency Low; the load of the aerobic system is too high, and the discharge water quality is not up to standard; (2) The load of the aerobic biochemical system is high, the daily biological sludge output is large, and the sludge disposal cost is high; (3) The impact load of water quality and water volume is large, and the system operates stably poor sex

[0005] At present, the treatment process of high-concentration refractory organic wastewater using iron-carbon internal electrolysis has the following disadvantages: 1) The biochemical improvement of iron-carbon micro-electrolysis refractory high-concentration toxic and harmful wastewater is very limited, resulting in the failure of the subsequent biochemical system to operate normally; 2) When the iron-carbon catalyst operates under low pH conditions, the reaction time is long, the amount of iron dissolution is large, and a large amount of iron sludge is generated, which is easy to cause blockage and hardening of iron-carbon packing, high backwash frequency, and short packing replacement cycle

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