从废弃物活性污泥发酵中通过硫酸氧化和C3-C5 io-SRB代谢剂进行量身定制的短链脂肪酸转化
Huijie Tan1, Aijuan Zhou2, Lijun Jia3
1College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; Shanxi Shanan Lide Environmental Science & Technology Co., LTD, Taiyuan, 030032, China.
Journal of environmental management
|September 15, 2023
概括
硫酸盐氧化和硫酸盐减少细菌通过改善分解和克服压力限制,从废弃活性污泥中增强短链脂肪酸 (SCFA) 的产生.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 在短链脂肪酸 (SCFA) 生产过程中,废弃活性污泥 (WAS) 发酵用于酸盐生产受到水解不足和高压的限制.
- 关键的SCFA包括酸盐 (HPr),丁酸盐 (HBu) 和酸盐 (HVa).
研究的目的:
- 通过将硫酸盐 (PS) 氧化与不完全氧化硫酸盐降解细菌 (io-SRB) 结合起来,改善WAS发酵中的SCFA生产.
- 研究PS氧化的效率和io-SRB在调整SCFA转换中的性能.
主要方法:
- 对废弃活性污泥 (WAS) 进行过硫酸盐 (PS) 氧化.
- 不完全氧化硫酸盐降解细菌 (io-SRB) 用于调节SCFA转化.
- 测量了分解效率和SCFA产量.
- 进行了分子生态网络分析,以了解微生物相互作用.
主要成果:
- PS显著增强了WAS分解,使溶解率增加了26.0%至39.4%.
- 在PS-HBu-SRB治疗中,SCFA产量达到462.7±42毫克COD/gVSS,是未经处理的WAS的7.4倍.
- 乙酸盐和HPr组合达到SCFA总量的85%,表明减少了压抑制.
- 硫酸盐基有效地分解了WAS,为io-SRB提供了电子受体.
结论:
- 将基于硫酸盐基的先进氧化过程 (SR-AOPs) 与微生物介导相结合,有效地加速了WAS的SCFA生产.
- 这种方法克服了WAS发酵的关键局限性,为资源回收提供了一个有前途的战略.
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