一种新型的桑和聚硫酸盐复合凝固剂,用于生物气泥的预处理,同时进行化和浮化:性能和基本机制
Ruohan Xia1, Wancen Liu1, Long D Nghiem2
1Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
Water research
|May 18, 2024
概括
一种新的酸盐和聚硫酸盐 (CTS-PFS) 凝固剂有效地从沼气泥中去除悬浮固体,提高其在农业中的使用. 这种方法还保留了必需的营养物质,如,和.
科学领域:
- 环境科学 环境科学
- 水处理 处理水的方法
- 农业工程 农业工程
背景情况:
- 生物气泥是无氧消化过程中富含营养的副产品,由于悬浮固体 (SS) 的高含量导致灌系统堵塞,因此在农业中未得到充分利用.
- 有效地去除SS对于利用生物气泥作为肥料和土壤调节剂至关重要.
研究的目的:
- 评估一种新型的酸盐和聚硫酸盐 (CTS-PFS) 复合凝固剂,用于生物气泥中SS的同时花和浮动.
- 优化CTS-PFS的合成和操作,以提高SS的去除和营养的保存.
主要方法:
- 使用正交的实验设计来确定最佳的CTS-PFS合成和操作条件.
- 将CTS-PFS的性能与单个酸盐 (CTS) 和聚硫酸盐 (PFS) 凝固剂进行了比较,以消除SS和保存营养素 (N,P,K).
- 凝固剂机制的分析,包括复杂的形成和泡生成用于浮动.
主要成果:
- 与单个CTS和PFS相比,CTS-PFS在清除SS和保存营养方面表现优越.
- 在CTS:PFS质量比为1:6时,可以达到最佳性能,导致SS去除增加41.5%,营养损失减少5.2%.
- CTS-PFS有效地去除了小型悬浮颗粒和溶解有机物 (0.4-2.0 kDa),保存了氨和,由多核基复合物和统一泡生产促进了浮.
结论:
- 新型CTS-PFS复合凝固剂为处理生物气泥提供了有效的解决方案,提高了其在农业中的应用性.
- 通过协同的花和浮动机制,CTS-PFS增强了SS的去除和营养的保存.
- 这项技术促进了生物气泥的可持续利用,为农业的循环经济原则做出了贡献.
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