Pilot-scale study of sludge pretreatment by microwave and sludge reduction based on lysis-cryptic growth.
To evaluate the performance of microwave (MW)-chemical hybrid sludge treatment system, a pilot scale MW disintegration unit (treatment capacity of 500L/d) was constructed. The results showed that organic matter, nitrogen, and phosphorus were effectively released from the MW-pretreated sludge. The values of COD released were 15.91%, 15.07%, 13.83%, 19.35%, and 15.07% for the MW, MW-acid, MW-alkali, MW-H2O2, and MW-H2O2-alkali treatment processes, respectively. Additionally, for a wastewater treatment system with a capacity of 200m(3)/d, when coupled with a MW sludge pretreatment unit, the sludge production and sludge yield were greatly reduced by 38.60% and to 0.35kg VSS/kg CODconsumed, respectively. The total operating cost of the lysis-cryptic growth system was 13.64% lower than that of the CAS system without a MW unit.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, PR China.
Yawei
Y
Wang
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, PR China.
Qingcong
Q
Xiao
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, PR China.
Jibao
J
Liu
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, PR China.
Hong
H
Yan
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, PR China. Electronic address: yswei@rcees.ac.cn.
Yuansong
Y
Wei
D001419:Bacteria / Q000528:radiation effects*; D002458:Cell Fractionation / Q000379:methods*; D008872:Microwaves; D010865:Pilot Projects; D011829:Radiation Dosage; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000032:analysis* / Q000382:microbiology*
D012722:Sewage
Cost analysis; Hydrogen peroxide; Microwave pretreatment; Pilot-scale; Sludge reduction