At the same time, the chemical and physical methods of coagulation, flocculation, settlement and sand filtering process are also feasible to remover COD in SBR effluent.
同时，混凝、絮凝沉淀及砂滤法等化学、物理方法对于去除SBR出水中的COD也是可行的。
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Lightly scuff sand flywheel face with 180 grit emery clothed clean surface with a wax and grease remover.