Effect of low initial C/N ratio on aerobic composting of swine manure with rice straw.
Two pilot composting experiments were conducted to investigate the effect of low initial C/N ratio on the composting of swine manure with rice straw by measuring physical and chemical parameters. The results showed that the thermophilic duration of bin 1 and bin 2 was long enough to satisfy the sanitary standard, and swine manure could reach maturity. Bin 1 containing larger amount of swine manure and less amount of rice straw showed a higher nitrogen loss (8%), shorter thermophilic phase, and longer maturity time (about 2 weeks) than bin 2. However, economical analysis showed a lower initial C/N ratio (20) could reduce 172 kg rice straw per ton fresh swine manure than a higher C/N ratio (25), and more swine manure could also be treated. Therefore, a low initial C/N ratio (20) could be suggested in the composting of swine manure with rice straw.
Zhu
Nengwu
N
College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, PR China. nwzhu@scut.edu.cn
D000332:Aerobiosis; D000818:Animals; D002244:Carbon / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008372:Manure / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis; D012275:Oryza; D018547:Plant Stems; D012037:Refuse Disposal / Q000379:methods; D012987:Soil / Q000032:analysis*; D013552:Swine; D013696:Temperature; D014867:Water
D008372:Manure; D012987:Soil; D014867:Water; D002244:Carbon; D009584:Nitrogen