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Removal of effluent organic matter with biofiltration for potable reuse: A review and meta-analysis
Water Research ( IF 12.8 ) Pub Date : 2021-04-22 , DOI: 10.1016/j.watres.2021.117180
Eric S. Peterson , R. Scott Summers

Biofiltration, historically used for biodegradable organic matter (BOM) removal in drinking water treatment, is being increasingly applied for potable reuse which requires unique characterization. This review and meta-analysis evaluates BOM occurrence as part of bulk wastewater effluent organic matter (EfOM), quantifies the roles of operational parameters to achieve EfOM removal in biofilters, and identifies research gaps which may be fruitful for understanding reuse biofilter performance. Literature data (n = 76) indicates EfOM has a high biodegradable fraction (median 26%), which after typical ozone doses is higher (57%). A biofiltration performance dataset (n = 160 across 42 WWTP effluents) shows that EfOM removal of 35–40% can be expected when design parameters are optimized. Specifically, higher EfOM removal is achieved by adding pre-ozonation and use of biological activated carbon (BAC) media, with comparatively smaller impacts of increasing ozone dose or increasing empty bed contact time under typical scenarios. Combined, these factors strongly correlate with observed EfOM removal (r2 = 0.64) after accounting for confounding by adsorptive removal in BAC media with fewer than 20,000 bed volumes treated. Future research that quantifies the occurrence of BOM, biomass activity on filter media, steady-state removal by BAC, and impacts of longer empty bed contact times in potable reuse scenarios could impact optimization strategies to meet or exceed biofilter performance observed to date.



中文翻译:

通过生物滤池去除废水中的有机物,以实现饮用水的可重复利用:综述和荟萃分析

从历史上讲,生物滤池用于饮用水处理中的可生物降解的有机物(BOM)去除,现在越来越多地用于需要独特表征的饮用水回用。这项审查和荟萃分析评估BOM的发生作为大批量废水有机物(EfOM)的一部分,量化操作参数在生物滤池中实现EfOM去除的作用,并确定研究空白,这对于理解重复使用的生物滤池性能可能是富有成果的。文献数据(n  = 76)表明EfOM具有较高的可生物降解率(中位数为26%),在典型的臭氧剂量后,EfOM较高(57%)。生物过滤性能数据集(n 在42个污水处理厂废水中= 160)表明优化设计参数后,预期EfOM去除35–40%。具体而言,通过添加预臭氧化和使用生物活性炭(BAC)介质可实现更高的EfOM去除率,在典型情况下,增加臭氧剂量或增加空床接触时间的影响相对较小。综合考虑,这些因素与观察到的EfOM去除密切相关(r 2 = 0.64),考虑到在少于20,000床床的BAC介质中通过吸附去除造成的混淆。未来研究将量化BOM的发生,过滤器介质上的生物量活性,BAC的稳态去除以及在可重复使用的情况下更长的空床接触时间的影响,可能会影响优化策略,以达到或超过迄今为止观察到的生物过滤器性能。

更新日期:2021-05-11
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