Effect of enriched thermotolerant nitrifying bacteria inoculation on reducing nitrogen loss during sewage sludge composting
Effect of enriched thermotolerant nitrifying bacteria inoculation on reducing nitrogen loss during sewage sludge composting
复制标题
接种富集耐热硝化细菌对减少污泥堆肥过程中氮素损失的影响
DOI：
10.1016/j.biortech.2020.123461
复制
发表时间：
2020-09-01
影响因子：
11.4
通讯作者：
Zheng, Zejia
中科院分区：
文献类型：
--
作者：
Zhao, Yi;Li, Weiguang;Zheng, Zejia
本研究通过高温驯化培养，从堆肥样品中获得富集的耐热硝化细菌（TNB），并将其接种到污水污泥堆肥中。测定了接种对玉米理化参数、氮素损失及参与氮素转化的细菌数量的影响。结果表明，接种富集TNB在温度、pH、有机质降解、C/N比和萌发指数等方面均提高了堆肥品质。与对照处理相比，接种处理减少了29.7%的氨排放量，并通过将堆肥中更多的NH4+-N转化为NO3——N而减少了氮的损失。此外，接种增加了硝化细菌的数量，并不能抑制本地氨化细菌的生长。结果表明，在污泥堆肥中接种富集TNB是减少氮流失、促进污泥成熟的可行途径。
In the study, enriched thermotolerant nitrifying bacteria (TNB) was acquired from compost samples by domesticated cultivation under high temperature, and was inoculated into sewage sludge composting. The effect of inoculation on physical-chemical parameters, nitrogen loss and bacterial population involved in nitrogen transformation were determined. The results revealed that inoculation with enriched TNB improved the compost quality in terms of temperature, pH, organic matter degradation, C/N ratio and germination index. Compared to the control treatment, inoculation also decreased 29.7% of ammonia emission and reduced nitrogen loss by converting more NH4+-N into NO3--N in composting. In addition, inoculation increased the population of nitrifying bacteria and was not capable of inhibiting the growth of indigenous ammonifying bacteria as well. The results suggested that inoculation with enriched TNB was a feasible way to reduce nitrogen loss and promote maturity in sewage sludge composting.