title: Effect of aeration rate on composting of penicillin mycelial dreg.
abstract: Pilot scale experiments with forced aeration were conducted to estimate effects of aeration rates on the performance of composting penicillin mycelial dreg using sewage sludge as inoculation. Three aeration rates of 0.15, 0.50 and 0.90L/(min·kg) organic matter (OM) were examined. The principal physicochemical parameters were monitored during the 32day composting period. Results showed that the higher aeration rate of 0.90L/(min·kg) did not corresponded to a longer thermophilic duration and higher rates of OM degradation; but the lower aeration rate of 0.15L/(min·kg) did induce an accumulation of NH4(+)-N contents due to the inhibition of nitrification. On the other hand, aeration rate has little effect on degradation of penicillin. The results show that the longest phase of thermophilic temperatures≥55°C, the maximum NO3(-)-N content and seed germination, and the minimum C/N ratio were obtained with 0.50L/(min·kg) OM. Therefore, aeration rates of 0.50L/(min·kg) OM can be recommended for composting penicillin mycelial dreg.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243002, China. Electronic address: 05553@163.com.
authors.forename: Shihua
authors.initials: S
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Qinxue
authors.initials: Q
authors.lastname: Wen
authors.affiliation: School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243002, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zheng
mesh_terms: D000388:Air; D004350:Drug Residues / Q000378:metabolism; D004553:Electric Conductivity; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D008027:Light; D025282:Mycelium / Q000378:metabolism*; D010406:Penicillins / Q000096:biosynthesis / Q000378:metabolism*; D010407:Penicillium / Q000378:metabolism*; D012987:Soil; D012988:Soil Microbiology; D013696:Temperature
chemical_list: D007220:Industrial Waste; D010406:Penicillins; D012987:Soil
keywords: Aeration rate; Composting; Penicillin mycelial dreg; Sewage sludge