title: Effects of aeration rate on maturity and gaseous emissions during sewage sludge composting.
abstract: This study investigated effects of aeration rate (AR) on maturity and gaseous emissions during sewage sludge composting, sewage sludge and corn stalks as the bulking agent were co-composted at different ARs (0.1, 0.2, 0.3L·kg(-1) dry matter (DM)·min(-1)). The thermophilic phase for the low and moderate AR treatments was able meet sanitation requirements, but too short to meet sanitation requirements in the high AR treatment. The high AR treatment was significantly different from the other treatments, and had the lowest electrical conductivity and highest E4/E6(absorbance ratio of wavelength 465 and 665nm). The AR influences the nitrogen variations; high AR compost had the highest NH4(+)-N content and lowest NOx(-)-N content. The AR was the main factor influencing compost stability, but the AR had little impact on pH and the germination index. The moderate AR treatment had the highest NH3 emissions during composting, while the low AR treatment had the highest CH4 and N2O emissions. Based on our comprehensive investigation, the recommended AR for sludge composting is 0.2L·kg(-1) DM·min(-1).
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Yuan
authors.affiliation: Bangor University, Deiniol Rd., Bangor, UK.
authors.forename: David
authors.initials: D
authors.lastname: Chadwick
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
authors.forename: Difang
authors.initials: D
authors.lastname: Zhang
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China. Electronic address: ligx@cau.edu.cn.
authors.forename: Guoxue
authors.initials: G
authors.lastname: Li
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
authors.forename: Shili
authors.initials: S
authors.lastname: Chen
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China; School of Civil, Mining and Environmental Engineering, University of Wollongong, NSW 2522, Australia.
authors.forename: Wenhai
authors.initials: W
authors.lastname: Luo
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
authors.forename: Longlong
authors.initials: L
authors.lastname: Du
authors.affiliation: College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
authors.forename: Shengzhou
authors.initials: S
authors.lastname: He
authors.affiliation: Beijing VOTO Biotech Co., Ltd., Beijing 100193, China.
authors.forename: Shengping
authors.initials: S
authors.lastname: Peng
mesh_terms: D000332:Aerobiosis; D000393:Air Pollutants / Q000032:analysis*; D000641:Ammonia / Q000032:analysis*; D004784:Environmental Monitoring; D008697:Methane / Q000032:analysis*; D009609:Nitrous Oxide / Q000032:analysis*; D012037:Refuse Disposal; D012722:Sewage / Q000032:analysis; D018505:Waste Management / Q000379:methods*; D003313:Zea mays / Q000737:chemistry
chemical_list: D000393:Air Pollutants; D012722:Sewage; D000641:Ammonia; D009609:Nitrous Oxide; D008697:Methane
keywords: Aeration rate; Composting; Gaseous emissions; Maturity; Sewage sludge