The Effect of Co-Additives (Biochar and FGD Gypsum) on Ammonia Volatilization during the Composting of Livestock Waste

Sustainability

Andi Febrisiantosa¹  Hong L. Choi¹  Balasubramani Ravindran² 

[1] Department of Agricultural Biotechnology, Research Institute for Agricultural and Life Science, Seoul National University, Seoul 151-742, Korea;Department of Environmental Energy and Engineering, Kyonggi University, Youngtong-Gu, Suwon 16227, Korea;

关键词: livestock waste;    composting additives combination;    ammonia;    volatilization;   

DOI  :  10.3390/su10030795

来源: DOAJ

【 摘 要 】

The effectiveness of co-additives for improving livestock waste composting (reduction of air pollution and conservation of nutrients) was investigated. Biochar and Flue gas desulphurization gypsum (FGD gypsum) were used to supplement the composting of a mixture of slaughter waste, swine slurry, and sawdust. Different compositions of additives (0% or 5% each, 10% biochar or FGD gypsum) were tested in triplicate on the laboratory scale. In addition, the effects of two different aeration schemes (continuous and intermittent) were also investigated. Ammonia volatilization, physicochemical characteristics, and compost maturity indices were investigated. The results indicated that the use of the co-additive (Biochar and FGD gypsum) during composting of livestock waste led to a reduction of ammonia volatilization by 26–59% and to a 6.7–7.9-fold increase of nitrate accumulation. The total ammonia volatilization of intermittent aeration treatment was lower than that of continuous aeration using co-additives treatment. It was concluded that co-additives (biochar and FGD gypsum) might be utilized in livestock waste composting to reduce ammonia volatilization and improve nutrient conservation.

【 授权许可】

Unknown