优化生物气生产的运行参数,使用屠宰场废水的双相基无氧消化:专注于甲生成阶段
1Center for Environmental Science, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia. dejene.tsegaye@aau.edu.et.
Bioresources and bioprocessing
|April 22, 2024
概括
该研究优化了屠宰场废水的分阶段无氧消化,在6天的液压保留时间和298毫克COD/L有机加载率下,该研究发现生物气生产和甲产量的最佳性能.
科学领域:
- 环境工程 环境工程
- 生物技术是生物技术.
- 废水处理 废水处理
背景情况:
- 屠宰场的废水由于其高有机负载而提出了重大处理挑战.
- 阶段性无氧消化 (AD) 为高效的废水处理和生物气产生提供了一个有前途的方法.
- 优化操作参数对于最大限度地提高AD系统中甲基生成反应堆的性能至关重要.
研究的目的:
- 在分阶段无氧消化中优化甲基生成反应器的操作参数.
- 用37.5°C的屠宰场废水评估甲基生成反应堆的性能.
- 为了确定甲基生成的最佳液压保留时间 (HRT) 和有机负载率 (OLR).
主要方法:
- 研究了甲基生成阶段与水解酸原反应堆的废水.
- 测试的HRT值从12天到3天,每隔3天.
- 评估的OLR为149,199,298和596毫克的COD/L.
- 监测废水度 (TN,TP,PO43−,SO42−,S2−),生物气生产,甲质量和产量.
- 评估的稳定性指标 (TVFA,Tota,TVFA:Tota比,盐度,pH) 和性能指标 (COD,VS去除效率).
主要成果:
- 在6天的HRT和298毫克COD/L的OLR达到最佳性能.
- 最大生物气产量为185±4毫升,甲产量为0.03毫克/升的COD.
- 对于化学氧气需求 (81%) 和挥发性固体 (95%) 的高清除效率.
- 甲质量在55%至67%之间.
结论:
- 在屠宰场废水的阶段性AD中,甲基生成反应器在6天HRT和298毫克COD/LOLR时得到了优化.
- 该系统展示了高效的COD和VS去除,以及大量的生物气和甲生产.
- 总 (TN) 和总 (TP) 的低去除效率表明需要进一步处理阶段.
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