Abstract
Aiming to the problem that the removal rates of COD, BOD5, SS is low, economic benefits and efficiency are poor on traditional treatment of cassava starch wastewater, a new treatment which combines UASB,CASS with coagulation was presented. The UASB anaerobic reactor is used to remove most of the wastewater containing organic carbon as a pretreatment. Then, CASS aerobic treatment equipment is presented to dislodge organic carbon left and materials such as nitrogen and phosphorus as a secondary process. The coagulation process combined with UASB and CASS was applied to eliminate the residual organic matter in waste water and make the emission up to the standard finally. The UASB-CASS-Coagulation treatment was applying in a certain starch factory and the results show that the proposed method has higher efficiency compared to traditional treatment of cassava starch wastewater. It can directly bring environmental benefits by reducing emissions and economic benefits by recycling methane and yellow pulp. So it has a wider application prospects, and can be popularized easily.
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