城市污泥成分对热水液化产品的影响:水相特性和生物降解性评估
Ibrahim Alper Basar1, Huan Liu1, Cigdem Eskicioglu1
1UBC Bioreactor Technology Group, School of Engineering, University of British Columbia Okanagan Campus, Kelowna, Canada.
Bioresource technology
|April 7, 2024
概括
来自废水污泥的热水液化水相显示污染物增加和生物降解能力降低,二次污泥比率更高. 污泥来源对这些特征产生重大影响.
科学领域:
- 环境工程 环境工程
- 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:
- 污水处理厂 (WWTP) 产生大量的污泥.
- 水热液化 (HTL) 是一种有前途的污泥利用技术.
- HTL水相的组成和生物降解性对于它们的管理至关重要.
研究的目的:
- 描述混合污泥中的HTL水相,其初级和二级污泥比例各不相同.
- 为了评估这些水相在不同条件下的生物降解性.
- 为了研究污泥来源对HTL水相特性的影响.
主要方法:
- 混合的污泥以不同的初级-二级污泥比率进行制备.
- 在污泥样本上进行了水热液化.
- 分析了化学氧气需求,-N,正酸-P,脂肪酸和N-异环.
- 进行了有氧,中性无氧和热性无氧生物降解性测试.
主要成果:
- 混合污泥中的二次污泥比率增加导致HTL水相中的污染物度更高 (COD,-N,正-P,脂肪酸,N-异环).
- HTL水相的生物降解性随着二次污泥比率的增加而下降.
- 与WWTP 2相比,WWTP 1污泥显示HTL水相特征的变化更大.
- 生物降解率在69-78% (有氧),58-70% (中性无氧) 和42-56% (热性无氧) 之间.
结论:
- 初级-二级污泥比率显著影响HTL水相的特性和生物降解性.
- 污泥的起源在HTL水相性质的变化中起着关键作用.
- 了解这些因素对于优化HTL过程和有效管理由此产生的水相至关重要.
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