Epoxidized soybean oil wastewater processing technology
A technology for epoxidized soybean oil and wastewater treatment, which can be applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve problems such as increasing construction costs.
Active Publication Date: 2015-12-09
NANTONG HAIERMA TECH CO LTD
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Problems solved by technology
[0002] Epoxidized soybean oil wastewater mainly contains oil, hydrogen peroxide, formic acid and fatty acid methyl ester, etc. It has strong acidity, high concentration of organic matter, and strong oxidative properties. The COD of raw water can be as high as 20000mg / L, and the pH is 1~2. The traditional treatment method is oil separation -Physical and chemical treatment-primary sedimentation-hydrolytic acidification-aeration-secondary sedimentation-discharge, due to the hydrolytic acidification tank, the construction cost and the risk in operation are greatly increased
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[0019] A kind of wastewater treatment process of epoxy soybean oil, the wastewater treatment of epoxy soybean oil is completed through oil separation, physical and chemical treatment, primary sedimentation, contact oxidation, secondary sedimentation and discharge successively, and its specific steps are as follows:
[0020] 1) Oil separation: add vacuum condensate to the epoxy wastewater to separate the slick oil in the epoxy wastewater. The epoxy wastewater and vacuum condensate are added from the two inlets of the grease separation tank, and then collected after the oil separation , to mix and adjust the water quality; part of the oil slick is purified and sold as a product, and part of the oil slick is treated as waste. Exhaust gas treatment device, the remaining waste water enters the reaction pool;
[0021] 2) Physicochemical treatment: add ferrous sulfate and liquid caustic soda to the wastewater in the reaction pool, connect the bottom of the reaction pool with a physic...
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The invention relates to an epoxidized soybean oil wastewater processing technology. The technology comprises successively performing oil separation, physicochemical processing, primary sedimentation, contact oxidation, secondary sedimentation and discharge, so as to finish wastewater processing of epoxidized soybean oil. The technology comprises the following advantages: after epoxidized soybean oil wastewater is subjected to two-grade oil separation, majority of oily substances in wastewater can be effectively removed, hydrogen peroxide is removed through Fenton high-grade oxidation, and thus COD in wastewater is basically removed by 80%-90%. pH is adjusted to neutral by adding a liquid alkali, and wastewater enters a flocculation basin when pH is 6-8, insoluble substances are removed by firstly adding PAM and then performing primary sedimentation, air floatation is performed for removing a few of suspensions and then wastewater enters an intermediate basin, and wastewater and domestic wastewater are stirred and adjusted through air, and thus wastewater accords with biochemical conditions (COD content is about 1800 mg / L and pH is about 7) and is pumped to a contact oxidation basin for biochemical processing, and then wastewater is subjected to secondary sedimentation and sludge is discharged, and the discharged water indexes accord with Integrated Wastewater Discharge Standard GB 8978-1996 and Wastewater Quality Standards for Discharge to Municipal Sewers CJ 343-2010.
Description
technical field [0001] The invention relates to a wastewater treatment process, in particular to an epoxy soybean oil wastewater treatment process. Background technique [0002] Epoxidized soybean oil wastewater mainly contains oil, hydrogen peroxide, formic acid and fatty acid methyl ester, etc. It has strong acidity, high concentration of organic matter, and strong oxidative properties. The COD of raw water can be as high as 20000mg / L, and the pH is 1~2. The traditional treatment method is oil separation -Physical and chemical treatment-primary sedimentation-hydrolytic acidification-aeration-secondary sedimentation-discharge, because of the hydrolytic acidification tank, the construction cost and the risk in operation are greatly increased. Contents of the invention [0003] The technical problem solved by the present invention is to provide an epoxy soybean oil wastewater treatment process that can reduce the setting of the hydrolysis acidification tank, greatly reduce ...
Claims
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IPC IPC(8): C02F9/14
Inventor 吴江曹志亮张浩
Owner NANTONG HAIERMA TECH CO LTD