以改性松木为新型可回收膨胀剂进行污水污泥堆肥：对氮转化和微生物群落结构的影响。
Using the modified pine wood as a novel recyclable bulking agent for sewage sludge composting: Effect on nitrogen conversion and microbial community structures.
机构信息
School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan Combined Pollution Control Research Academician Workstation, Zhengzhou, Henan 450001, China.
School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China.
出版信息
Bioresour Technol. 2020 Aug;309:123357. doi: 10.1016/j.biortech.2020.123357. Epub 2020 Apr 10.
This study investigated the effect of a recoverable sulphuric acid and sodium hydroxide-modified pinewood (MOP) as a bulking agent during sewage sludge and sawdust composting (MOPC), with a control experiment using unpretreated pinewood (UNP; UNPC) as the bulking agent. Results show that addition of MOP effectively promoted the degradation of organic matter during composting. The maximum temperature increased by 1.50 °C and the high temperature period (T > 50 °C) of composting was extended 4 days longer than the control experiment. Furthermore, MOP addition reduced the loss of nitrogen by 9.40%. High-throughput sequencing analysis showed that the bacterial communities in the UNPC and MOPC treatments were significantly different. Pseudoxanthomonas was the dominant bacteria during the thermophilic and cooling phases of the MOPC treatment. In addition, the recycling efficiency of the UNP and MOP was 99.18% and 99.37%, respectively.
本研究探讨了可回收硫酸和氢氧化钠改性松木（MOP）作为膨松剂在污水污泥和木屑堆肥（MOPC）中的作用，以未预处理松木（UNP；UNPC）作为膨松剂的对照实验。结果表明，添加 MOP 可有效促进堆肥过程中有机物的降解。最大温度升高 1.50°C，高温期（T>50°C）比对照实验延长了 4 天。此外，MOP 的添加减少了 9.40%的氮素损失。高通量测序分析表明，UNPC 和 MOPC 处理中的细菌群落存在显著差异。假单胞菌是 MOPC 处理中高温和冷却阶段的优势细菌。此外，UNP 和 MOP 的回收效率分别为 99.18%和 99.37%。
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