E3S Web Conf.
Volume 194, 20202020 5th International Conference on Advances in Energy and Environment Research (ICAEER 2020)
|Number of page(s)||5|
|Section||Environmental Protection and Pollution Control|
|Published online||15 October 2020|
The combined effects of hydrothermal treatment and Na2S2O8/ CuFe2O4 magnetic oxidation on sludge dewaterability improvement
1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
2 Engineering Laboratory for Energy System Process Conversion & Emission Control Technology of Jiangsu Province, School of Energy & Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China
3 China Construction Power and Environment Engineering Co., LTD, Nanjing 210017, China
* Corresponding author: firstname.lastname@example.org
# Co-first author: Yonghao Chen and Dandan Chen. These authors contributed equally to this work.
Na2S2O8/CuFe2O4 addition and hydrothermal pretreatment were combined in this paper to ameliorate the dewatering performance (DP) of sludge with specific-resistance of filtration (SRF), time of capillary suction (CST), and water content (Wc) as well as water types investigated. The results shown the synergistic effect between Na2S2O8/CuFe2O4 addition and hydrothermal pretreatment and the DP of sludge reached to the best when the hydrothermal temperature was 150oC, the addition amount of Na2S2O8 was 0.08 mmol/g-VSS and the mass ratio of Na2S2O8/CuFe2O4 was 2.0. Through the analysis of water distribution, it was also demonstrated that the sludge structure was destroyed with the surface moisture released. All the results obtained shown the significant impact of the combined methods on ameliorating DP of sludge and promoting sludge recovery and utilization.
© The Authors, published by EDP Sciences, 2020
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