Meng Liqiang, Li Weiguang, Zhang Shumei, Zhang Xiancheng, Zhao Yi, Chen Li
Institute of Microbiology, Heilongjiang Academy of Sciences, Harbin, 150010, China.
Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China.
Sci Rep. 2021 Jan 14;11(1):1319. doi: 10.1038/s41598-020-79443-3.
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, CO 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 NH 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 NH emission and improve compost maturity in the SS composting.
在本研究中，在实验室规模的污水污泥堆肥中评估了碳源对堆肥过程和质量的影响。在5升反应器中进行了32天的堆肥实验。结果表明，碳源可以改变氮的转化并提高堆肥质量。特别是，易降解的碳源可以促进有机物降解，改善氮转化过程并加速堆肥成熟。在污水污泥堆肥过程中添加葡萄糖和蔗糖可以增加溶解有机碳、CO排放、脱氢酶活性、硝化作用和发芽指数。这是因为葡萄糖和蔗糖可以被微生物迅速用作能量和碳源物质，以增加微生物活性和氨同化作用。此外，在葡萄糖和蔗糖处理中，NH排放分别减少了26.9%和32.1%。因此，添加易降解的碳源可以减少污水污泥堆肥中的NH排放并提高堆肥成熟度。
