School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; Jiangsu Key Laboratory of Environmental Science and Engineering, Suzhou 215009, China.
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
Bioresour Technol. 2022 Nov;363:127919. doi: 10.1016/j.biortech.2022.127919. Epub 2022 Sep 8.
Strong oxidants can reduce the emission of NH during composting. But as a commonly used oxidant, the influence of persulfate on nitrogen transformation during composting is unclear. In this study, the effects of 0.3 %-1.2 % potassium persulfate (PS) on nitrogen losses and microbial community during air-dried cow manure composting were investigated. The results showed that PS could reduce nitrogen losses compared to the control. This was because it decreased pH and the maximum NH-N content of treatments, which was beneficial to nitrogen retention. In addition, Pseudoxanthomonas and Chelativorans were enriched compared to the control, which might be associated with NH-N transformation and nitrogen fixation. Meanwhile, PS increased the abundance of thermophilic lignocellulose degrading bacteria, and 0.3 % and 0.6 % PS increased the maximum temperature and the duration of the thermophilic period. This study indicated that PS could reduce nitrogen losses in composting and greatly influence nitrogen transforming and lignocellulose degrading bacteria.
强氧化剂可以减少堆肥过程中 NH 的排放。但过一硫酸氢钾作为一种常用的氧化剂，其对堆肥过程中氮转化的影响尚不清楚。本研究考察了 0.3%-1.2%过一硫酸氢钾（PS）对风干牛粪堆肥过程中氮损失和微生物群落的影响。结果表明，PS 处理可减少氮损失，这是因为 PS 降低了 pH 值和处理中最大 NH-N 含量，有利于氮的保留。此外，与对照组相比，Pseudoxanthomonas 和 Chelativorans 得到了富集，这可能与 NH-N 转化和固氮有关。同时，PS 增加了嗜热木质纤维素降解菌的丰度，0.3%和 0.6% PS 增加了最高温度和高温期的持续时间。本研究表明，PS 可以减少堆肥过程中的氮损失，并对氮转化和木质纤维素降解菌产生重大影响。
