title: Feasibility of co-composting of sewage sludge, spent mushroom substrate and wheat straw.
abstract: In this study, the lab-scale co-composting of sewage sludge (SS) with mushroom substrate (SMS) and wheat straw (WS) conducted for 20days was evaluated. The addition of SMS evidently increased CO2production and dehydrogenase activity. The combined addition of SMS and WS significantly improved the compost quality in terms of temperature, organic matter degradation and germination index, especially, reduced 21.9% of NH3emission. That's because SMS and WS possessed the complementarity of free air space and contained plenty of degradable carbon source. The SMS could create a comfortable environment for the nitrifying bacteria and improve nitrification. The carbohydrates from combined addition of SMS and WS could be utilized by thermophilic microorganisms, stimulate ammonia assimilation and reduce NH3emission. These results suggested that adding SMS and WS could not only improve the degradation of organic matter and the quality of compost product, but also stimulate ammonia assimilation and reduce ammonia emission.
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin, China; Institute of Microbiology, Heilongjiang Academy of Sciences, 150010 Harbin, China; Institute of Advanced Technology, Heilongjiang Academy of Sciences, 150020 Harbin, China.
authors.forename: Liqiang
authors.initials: L
authors.lastname: Meng
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin, China; State Key Laboratory of Urban Water Resource and Enviroment, Harbin Institute of Technology, 150090 Harbin, China. Electronic address: hitlwg@126.com.
authors.forename: Weiguang
authors.initials: W
authors.lastname: Li
authors.affiliation: Institute of Microbiology, Heilongjiang Academy of Sciences, 150010 Harbin, China; Institute of Advanced Technology, Heilongjiang Academy of Sciences, 150020 Harbin, China.
authors.forename: Shumei
authors.initials: S
authors.lastname: Zhang
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin, China.
authors.forename: Chuandong
authors.initials: C
authors.lastname: Wu
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin, China.
authors.forename: Longyi
authors.initials: L
authors.lastname: Lv
mesh_terms: D000363:Agaricales / Q000737:chemistry; D000641:Ammonia / Q000032:analysis / Q000378:metabolism; D001419:Bacteria / Q000378:metabolism; D002244:Carbon / Q000378:metabolism; D002245:Carbon Dioxide / Q000032:analysis / Q000378:metabolism; D018525:Germination; D058465:Nitrification; D018520:Plant Shoots / Q000737:chemistry / Q000378:metabolism; D012722:Sewage; D012987:Soil / Q000737:chemistry; D013696:Temperature; D014908:Triticum / Q000737:chemistry / Q000378:metabolism; D018505:Waste Management / Q000379:methods*
chemical_list: D012722:Sewage; D012987:Soil; D002245:Carbon Dioxide; D002244:Carbon; D000641:Ammonia
keywords: Ammonia emission; Composting; Sewage sludge; Spent mushroom substrate; Wheat straw