农村污水污泥的无氧稳定和景观利用来自增强膜凝结过程的农村污水污泥
Heng Xu1, Shanghui Wei1, Song Chen2
1School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China.
The Science of the total environment
|December 14, 2024
概括
增强的膜凝固污泥预处理显著增加了生物气和甲的生产. 最佳条件还可以改善释放,并产生有价值的肥料,促进植物生长.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 废物管理 废物管理
背景情况:
- 增强膜凝固 (EMC) 污泥对有效的资源回收提出了挑战.
- 性预处理被探索为一种提高污泥生物降解性和营养释放的方法.
研究的目的:
- 为优化EMC污泥的性预处理条件.
- 评估预处理对生物气生产和微生物群落动态的影响.
- 为了评估产生的消化物的肥料潜力.
主要方法:
- 在EMC污泥中进行了各种性 (pH7.2-11),温度 (35-55°C) 和持续时间 (0.5h-1day) 的预处理.
- 预处理的污泥在半连续无氧消化器中使用了176天.
- 分析了生物气产量,甲度和微生物群落.
- 消化剂被测试为其作为木植物肥料的有效性.
主要成果:
- 最佳的预处理 (pH 11,55°C,1天) 将液化颗粒物COD转化为SCOD (8435 mg/L) 和增强释放 (91.8 mg/L).
- 甲产量达到188.4mL/gVS,生物气产量增加.
- 微生物群落发生了转变,特定的细菌和甲基生物在不同阶段占主导地位.
- 来自最佳预处理的消化物促进了比化学肥料更好的木植物生长.
结论:
- 性预处理有效地提高了沼气生产和EMC污泥中的营养回收.
- 优化的预处理条件改善了污泥水解和溶解.
- 作为一种可持续的肥料,EMC消化剂显示出承诺,支持植物生长.
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