Abstract
Sludge dewatering is a key part of sludge disposal since it can greatly reduce the volume of sludge and thus improve the treatment effect for handling and disposing. This study investigated the potential benefits of enzymatic pretreatment on activated sludge dewatering with four kinds of enzyme. Capillary suction time (CST) and the solid content after centrifugationwere used to evaluate sludge dewatering. A compression test of paper sludge obtained after treatment was carried out. Besides, some basic properties of activated sludge such as solid content, organic material content, ash content,MLSS,SV30,SVI.The results showed that enzyme additions did not enhanc the dewaterability of the biosolids samples ,but this positively affected filterability of the samples in the compression test. According to these results,enzyme product addition for biosolids samples seems a promising new method of enhancing the performance of mechanical dewatering units in the future.
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