在科罗拉多州试点规模的三个多间隔无氧混反应堆的性能分析,这些反应堆在心理友好温度下处理家用废水
Jennie L Callahan1,2, Andrew R Pfluger2,3, Carolyn L Coffey2,4
1Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado, USA.
概括
使用无氧混反应器 (ABR) 探索可持续的废水处理. 这些反应堆提供节能和生物气生产,其性能受到影响的特征的影响,特别是在寒冷的气候下.
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:
- 低效的有氧废水处理需要可持续的替代方案.
- 无氧生物反应器可以减少能源消耗,降低生物固体生产,并可再生地产生生物气体.
- 无氧技术的设计指南有限,特别是在寒冷的气候下,阻碍了广泛采用.
研究的目的:
- 为在心理友好条件下运行的无氧混反应堆 (ABR) 推导设计原则.
- 评估试点规模的ABR在处理具有不同特性的废水方面的性能.
- 确定影响冷气候无氧废水处理中甲产生的关键因素.
主要方法:
- 在心理友好条件下运行三个试点级无氧混反应堆 (ABR).
- 监测化学氧气需求 (COD) 和悬浮固体清除效率.
- 量化甲产量和生物气组成.
- 影响性特征的分析,包括可溶性COD (sCOD) 和硫酸盐度.
主要成果:
- 在ABR中,COD的平均去除效率为56%,悬浮固体的平均去除效率为80%.
- 平均甲产量为0.21 L CH4/g CODrem,其中生物气含有63%的甲.
- 甲生产与影响性sCOD/硫酸盐比率呈正相关性,与影响性硫酸盐负相关性.
结论:
- 无氧混反应器有效处理各种强度的废水,并有显著的COD和固体去除.
- 可用的甲生产是可以实现的,通过管理有影响的sCOD和硫酸盐水平,具有优化潜力.
- 影响废水特性显著影响ABR性能,即使在恒定的操作条件下,如温度和HRT.
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