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通过酸性发酵通过污水污泥促进短链脂肪酸的生产:优化操作因素和基于铁的硫酸盐激活系统

Faxin Liu¹, Wen Cheng¹, Jianping Xu¹

¹State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, NO.5, South Jinhua Road, Xi'an, Shaanxi, 710048, China.

|September 15, 2023

概括

本综述探讨了在酸性发酵 (AF) 过程中增强短链脂肪酸 (SCFA) 生产的方法. 铁/硫酸盐 (PS) 系统通过改善水解和抑制甲原体,有效地增强SCFA,并有可能回收富含铁的污泥.

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:

对于短链脂肪酸 (SCFA) 生产的酸性发酵 (AF) 在工艺稳定性和产量方面面临挑战.
污水污泥中的花剂中的铁积累会影响AF性能.
优化AF需要了解操作因素和影响.

研究的目的:

审查影响SCFA生产无氧发酵的关键因素.
评估铁/硫酸盐 (PS) 系统在增强SCFA中的有效性.
探索在废水处理厂回收富含铁的污泥的潜力.

主要方法:

关于AF的操作和影响因素的综合文献综述.
分析铁盐花剂对AF的影响,包括铁化物 (FC) 和聚铁硫酸盐 (PFS).
研究铁/PS系统的机制,包括基因生成和对微生物群体 (酸性细菌与甲基生物) 的影响.

主要成果:

适当的铁化物 (FC) 促进SCFA,而聚铁硫酸盐 (PFS) 抑制AF.
铁/PS系统通过改善溶解和水解,显著提高了SCFA的产量.
铁/PS系统会改变氧化降解潜力 (ORP) 和pH值,对甲基生物产生负面影响比酸性细菌更大.
来自污泥的富含铁的生物炭显示了增强SCFA生产的潜力.

结论:

铁/PS系统是一种有前途的方法,可以促进AF的SCFA生产.
在碳中和废水处理厂 (WWTP) 中回收富含铁的污泥可以提高AF的性能.
建议对铁激活PS系统和污泥利用进行进一步的研究,以优化AF过程.

关键词:

酸性发酵过程中的酸性发酵.铁泥是铁泥中的一种.铁/PS系统系统在SCFAs中,SCFAs是最重要的.

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