Research On The Recycling Treatment Technologies And Utilization Mode Of Corn Deep Processing Wastewater

Corn deep processing industry, as focus of agricultural industrialization in China, not only is a high energy and resource consumption industry, but also is a seriously polluted industry. How to realize the waste resoure utilization, is very important to the sustainable development of corn deep processing industry. However, the research about waste resource utilization technology and mode of corn deep processing industry is underdevelopment.This study was focus on treatment technologies of corn deep processing wastewater, using industry ecological tools and high effective aerobic and anaerobic technologies, and taking a corn deep processing plant located in China as basic unit. The mathematics model for resource recycling utilization of corn deep processing eco-industrial park wastewater was built, using anaerobic model ADM1 and active sludge model ASM1 as theoretical basis.This study used material flow analysis (MFA) to analysis the pollution load of the typical enterprise. And MFA index was first determined in typical corn deep processing. That wastewater resource recycling utilization was the key controlling factor of enterprise environmental management was found by analyzing the obtained material flow mode and index. The TMR value of total material demands intensity account was 2.8118×107t/a.A model project with"CSTR-UASBAF-NMBR"process was used for the resource recycling treatment of the corn deep processing wastewater. The effluent achieved"reused water quality standard"requests. After the start-up of Acidogenic phase finished, the average COD removal rate was above 50%, the average BOD removal rate was 49.1%. The aqueous terminal productions were acetic acid(800~1000mg/L), butyric acid(200~600mg/L), propionic acid(588mg/L) and ethanol. Fermentation type was the mixed acid type fermentation. After 50 days, the start-up of UASBAF finished, the average COD removal rate was above 85.1%, the average BOD removal rate was 84%, the average pH value was 6.5~7.0. When HRT is 18h, the average COD was 30.44mg/L, the average BOD was 9.11mg/L, the average pH value was 6.85, the average ammonia nitrogen was 15.01mg/L. The capital construction investment per COD removal was 940.007 Yuan /Kg COD; the operation cost was 2.38 Yuan per ton wastewater at formal operative period.Based on the two phases anaerobic reactors and new membrane bioreactor process operations were simulated. The mathematics model for resource recycling utilization of corn deep processing eco-industrial park wastewater was built, using anaerobic model ADM1 and active sludge model ASM1 as theoretical basis.