The role of membrane filter press in soybean production wastewater

The role of membrane filter press in soybean production wastewater

At present, China's soybean protein manufacturer has built hundreds, dozens of companies built with a large scale. The current level of protein soybean production is the production of one ton of soy protein isolate emissions 30-35 tons of soybean whey waste water. In the soybean whey waste water treatment which has been built, due to the unreasonable waste water treatment process, the final disposal of waste water can’t reach to the standard. In this paper, a comprehensive introduction of soy separation protein waste water treatment technical features at home and overseas, For example of a company with 2000m3/d soy protein isolate waste water treatment as a case, to analyze its original treatment process defects, then identify the key influencing discharge standards factors. And technical optimization transformation, achieved good results. Original project uses "UASB + CASS" of "anaerobic + aerobic" biochemical process, the treated effluent CODc, 800mg / L, SS1300mg / L, can not meet emissions standards. The reason is that the original engineering analysis UASB influent SS is high, reaching about 5000 mg / L, more than the UASB processing capacity, resulting in reduced processing capability of anaerobic stage. Anaerobic effluent CODcr2000 mg / L, SS4000 mg / L, after entering the aerobic phase resulting CASS processing load is too high, resulting in unable to meet emissions standards. This transformation is based on the removal of waste water SS as a breakthrough, strengthen biological treatment facilities, improve processing efficiency, in order to achieve the purpose of discharge standards. The use of "physical and chemical + biological" process route of the original process optimization. To ensure the effectiveness of anaerobic treatment stage, in front of the anaerobic plus flotation to remove SS, reducing the overall load biological treatment system for stable operation of the anaerobic process to provide a guarantee for the stability of the standard laid the foundation for the overall project. Anaerobic treatment step changes by the UASB to EGSB, processing efficiency increased from less 80% to over 90%, to prove the use of EGSB process to handle soy protein isolate is feasible. On the basis of the existing anaerobic seat 2 CASS pool on alterations to the "two A / O" process that treatment effect NH3-N was significantly better than CASS process, plays a crucial Status role in the stability of the overall project. New built 1 set of secondary settling tank, the remaining organic pollutants, ammonia be removed. Through the various structures to transform it to isolated soy protein waste water has good treatment effect. After engineered treated effluent CODcr100 mg / LNH3-N15 mR / L, SS70 mg / L, to achieve "Integrated Waste water Discharge Standard" (GB8978-1996) level of emission standards, to achieve discharge standards. Zhengzhou Toper company membrane filter press has a better separation effect of the soybean production waste water, welcome to purchase.

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