Effect of phosphogypsum and dicyandiamide as additives on NH_3,N_2O and CH_4 emissions during composting  

作　　者：Yiming Luo Guoxue Li Wenhai Luo Frank Schuchardt Tao Jiang Degang Xu 

机构地区：[1]College of Resource and Environmental Science, China Agricultural University [2]Institute of Agricultural Technology and Biosystems Engineering, Johann Heinrich von Thuenen-Institute [3]College of Chemistry, Leshan Normal University [4]Research Institute of Safety and Environment Technology, CNPC

出　　处：《Journal of Environmental Sciences》2013年第7期1338-1345,共8页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.40971177);the National Key Technology R&D Program(No.2012BAD14B01,2012BAD14B03);the Sino-German Cooperation Project of Recycling of Organic Residues from Agricultural and Municipal Residues in China(No.BMBF,FKZ0330847);the Chinese Universities Scientific Fund

摘　　要：A laboratory scale experiment of composting in a forced aeration system using pig manure with cornstalks was carried out to investigate the effects of both phosphogypsum and dicyandiamide （DCD, C2 H4 N4 ） as additives on gaseous emissions and compost quality. Besides a control, there were three amended treatments with different amounts of additives. The results indicated that the phosphogypsum addition at the rate of 10% of mixture dry weight decreased NH3 and CH4 emissions significantly during composting. The addition of DCD at the rate of 0.2% of mixture dry weight together with 10% of phosphogypsum further reduced the N20 emission by affecting the nitrification process. Reducing the phosphogypsum addition to 5% in the presence of 0.2% DCD moderately increased the NH3 emissions but not N20 emission. The additives increased the ammonium content and electrical conductivity significantly in the final compost. No adverse effect on organic matter degradation or the germination index of the compost was found in the amended treatments. It was recommended that phosphogypsum and DCD could be used in composting for the purpose of reducing NH3 , CH4 and N20 emissions.0ptimal conditions and dose of DCD additive during composting should be determined with different materials and composting systems in further study.A laboratory scale experiment of composting in a forced aeration system using pig manure with cornstalks was carried out to investigate the effects of both phosphogypsum and dicyandiamide （DCD, C2 H4 N4 ） as additives on gaseous emissions and compost quality. Besides a control, there were three amended treatments with different amounts of additives. The results indicated that the phosphogypsum addition at the rate of 10% of mixture dry weight decreased NH3 and CH4 emissions significantly during composting. The addition of DCD at the rate of 0.2% of mixture dry weight together with 10% of phosphogypsum further reduced the N20 emission by affecting the nitrification process. Reducing the phosphogypsum addition to 5% in the presence of 0.2% DCD moderately increased the NH3 emissions but not N20 emission. The additives increased the ammonium content and electrical conductivity significantly in the final compost. No adverse effect on organic matter degradation or the germination index of the compost was found in the amended treatments. It was recommended that phosphogypsum and DCD could be used in composting for the purpose of reducing NH3 , CH4 and N20 emissions.0ptimal conditions and dose of DCD additive during composting should be determined with different materials and composting systems in further study.

关 键 词：COMPOSTING PHOSPHOGYPSUM DICYANDIAMIDE greenhouse gas pig manure 

分 类 号：S141.4[农业科学—肥料学]