1. Pilot-scale study of sludge pretreatment by microwave and sludge reduction based on lysis-cryptic growth
- Author
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Yuansong Wei, Hong Yan, Qingcong Xiao, Jibao Liu, and Yawei Wang
- Subjects
Environmental Engineering ,Lysis ,chemistry.chemical_element ,Bioengineering ,Pilot Projects ,Cell Fractionation ,Radiation Dosage ,chemistry.chemical_compound ,Organic matter ,Hydrogen peroxide ,Microwaves ,Waste Management and Disposal ,chemistry.chemical_classification ,Waste management ,Bacteria ,Sewage ,Renewable Energy, Sustainability and the Environment ,Phosphorus ,General Medicine ,Pulp and paper industry ,Nitrogen ,Refuse Disposal ,chemistry ,Sewage sludge treatment ,Sewage treatment ,Microwave - Abstract
To evaluate the performance of microwave (MW)-chemical hybrid sludge treatment system, a pilot scale MW disintegration unit (treatment capacity of 500 L/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 200 m3/d, when coupled with a MW sludge pretreatment unit, the sludge production and sludge yield were greatly reduced by 38.60% and to 0.35 kg 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.
- Published
- 2015