Liqiang Meng1,2, Weiguang Li3,4, Shumei Zhang1,2, Xiancheng Zhang1, Yi Zhao5, Li Chen5. 1. Institute of Microbiology, Heilongjiang Academy of Sciences, Harbin, 150010, China. 2. Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China. 3. School of Environmental Engineering, Harbin Institute of Technology, Box no. 2602, 73 Huanghe Road, Harbin, 150090, Heilongjiang, China. hitlwg@126.com. 4. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China. hitlwg@126.com. 5. School of Environmental Engineering, Harbin Institute of Technology, Box no. 2602, 73 Huanghe Road, Harbin, 150090, Heilongjiang, China.
Abstract
In present study, the effects of carbon sources on compost process and quality were evaluated in the lab-scale sewage sludge (SS) composting. The composting experiments were performed for 32 days in 5 L reactors. The results showed that carbon sources could change the nitrogen conversion and improve the compost quality. Especially, the readily degradable carbon source could promote organic matter degradation, improve nitrogen conversion process and accelerate compost maturation. The addition of glucose and sucrose could increase dissolved organic carbon, CO2 emission, dehydrogenase activity, nitrification and germination index during the SS composting. That's because glucose and sucrose could be quickly used by microbes as energy and carbon source substance to increase activity of microbes and ammonia assimilation. What's more, the NH3 emission was reduced by 26.9% and 32.1% in glucose and sucrose treatments, respectively. Therefore, the addition of readily degradable carbon source could reduce NH3 emission and improve compost maturity in the SS composting.
In present study, the effects of n class="Chemical">carbon sources onpan> cpan> class="Chemical">ompost process and quality were evaluated in the lab-scale sewage sludge (SS) composting. The composting experiments were performed for 32 days in 5 L reactors. The results showed that carbon sources could change the nitrogen conversion and improve the compost quality. Especially, the readily degradable carbon source could promote organic matter degradation, improve nitrogen conversion process and accelerate compost maturation. The addition of glucose and sucrose could increase dissolved organic carbon, CO2 emission, dehydrogenase activity, nitrification and germination index during the SS composting. That's because glucose and sucrose could be quickly used by microbes as energy and carbon source substance to increase activity of microbes and ammonia assimilation. What's more, the NH3 emission was reduced by 26.9% and 32.1% in glucose and sucrose treatments, respectively. Therefore, the addition of readily degradable carbon source could reduce NH3 emission and improve compost maturity in the SS composting.