Conditioning of sewage sludge by Fenton's reagent combined with skeleton builders |
| |
Authors: | Liu Huan Yang Jiakuan Shi Yafei Li Ye He Shu Yang Changzhu Yao Hong |
| |
Institution: | a School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China b Universtar Science & Technology (Shenzhen) Co. Ltd., Shenzhen, Guangdong 518057, PR China c State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China |
| |
Abstract: | Physical conditioners, often known as skeleton builders, are commonly used to improve the dewaterability of sewage sludge. This study evaluated a novel joint usage of Fenton’s reagent and skeleton builders, referred to as the F-S inorganic composite conditioner, focusing on their efficacies and the optimization of the major operational parameters. The results demonstrate that the F-S composite conditioner for conditioning sewage sludge is a viable alternative to conventional organic polymers, especially when ordinary Portland cement (OPC) and lime are used as the skeleton builders. Experimental investigations confirmed that Fenton reaction required sufficient time (80 min in this study) to degrade organics in the sludge. The optimal condition of this process was at pH = 5, Fe2+ = 40 mg g−1 (dry solids), H2O2 = 32 mg g−1, OPC = 300 mg g−1 and lime = 400 mg g−1, in which the specific resistance to filtration reduction efficiency of 95% was achieved. |
| |
Keywords: | Sewage sludge Dewaterability Fenton&rsquo s reagent Skeleton builders Specific resistance to filtration (SRF) |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|