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阳离子聚烯胺减轻了废物活性污泥无氧消化过程中的抑制作用

Baowei Zhang¹, Xiang Tang¹, Qiuxiang Xu¹

¹College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.

Environmental science and ecotechnology

|September 13, 2023

概括

阳离子聚烯胺 (APAM) 可以减轻废物活性污泥 (WAS) 无氧消化 (AD) 中的 (Cd) 毒性. 适度的APAM应用 (1.5 mg/g TSS) 改善了甲产量和微生物活性,为废水处理厂 (WWTP) 的重金属抑制提供了解决方案.

科学领域:

环境科学环境科学
环境工程环境工程
生物技术是生物技术.

背景情况:

工业废水排放导致 (Cd) 在废物活性污泥 (WAS) 中积累.
高度的Cd抑制了废水处理厂 (WWTP) 中的无氧消化 (AD) 系统.
迫切需要有效的减轻AD中Cd毒性的策略.

研究的目的:

调查阴性多烯胺 (APAM) 在减轻WAS AD.中Cd毒性的疗效.
为了确定减轻Cd不良影响的最佳APAM剂量.
阐明APAM减轻Cd毒性的机制.

主要方法:

使用有毒Cd度 (5.0 mg/g TSS) 的WAS进行了AD实验.
应用了不同的APAM剂量 (1.5,3.0和6.0 mg/g TSS).
分析了甲产量,微生物群落结构,酶活动和反应性氧物种 (ROS) 生产.

主要成果:

APAM有效地减轻了Cd的毒性,其中1.5mg/g的TSS显示了最高的疗效.
适度的APAM (1.5 mg/g TSS) 通过增强溶解,水解和酸化,恢复了甲产量从190.5到228.9mL/g VS.
通过吸附,APAM增加了关键微生物的丰度 (例如,甲醇内亚,卡尔迪内亚),促进了酶活动,并通过吸附减少了Cd诱导的ROS.

结论:

适度的APAM应用是一种可行的和有前途的策略,以减轻WAS AD.中的Cd毒性.
APAM的机制涉及促进AD过程,增强微生物活动和吸附Cd.
这种方法为管理WWTP中的重金属毒性提供了潜在的解决方案.

关键词:

无氧消化消化无氧消化无离子聚烯胺是什么?的毒性的毒性废弃的活性污泥废弃物

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