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Dissolved organic carbon removal by biological treatment

机译：通过生物处理去除溶解的有机碳

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摘要

Dissolved organic carbon (DOC) is problematic in water recycling or wastewater disposal when it provides precursors for disinfection by-product formation or when it provides a carbon/energy source for microorganisms and biofilms in receiving waters and in distribution systems. Biologically stable water protects receiving waters and recycled water systems. This paper provides initial findings of a research project into optimising DOC removal from water by biological treatment in order to improve its quality and protect public and environmental health. Biological treatment achieves this goal while minimising highly technological and energy intensive processes. The effects of chemical pretreatment, dissolved oxygen, filtration media choice, pre-oxidation and flow rate are reported. Initial results demonstrate that low flow rate biologically active carbon (BAC) filtration can exhibit biological degradation processes with much higher DOC removal than typically observed in conventional BAC filtration. Results also indicate that the high level of biological activity observed requires aeration to meet oxygen demand and that ozonation improves DOC removal but is not essential for high rate removal. Characterisation of the DOC components removed has been conducted and has identified and quantified the organic compound fractions removed by the biological processes. BAC filtration has the potential to achieve high levels of DOC removal with low energy consumption
机译：当溶解的有机碳（DOC）提供消毒副产物形成的前体或当其为接收水和分配系统中的微生物和生物膜提供碳/能源时，溶解有机碳（DOC）在水循环或废水处理中会遇到问题。生物稳定的水可以保护接收水和循环水系统。本文提供了一个研究项目的初步发现，该研究项目旨在优化通过生物处理从水中去除DOC的方法，以提高其质量并保护公众和环境健康。生物处理可实现此目标，同时最大限度地减少高科技和高能耗工艺。报告了化学预处理，溶解氧，过滤介质的选择，预氧化和流速的影响。初步结果表明，与常规BAC过滤相比，低流速生物活性炭（BAC）过滤可以显示出具有更高的DOC去除率的生物降解过程。结果还表明，观察到的高水平生物活性需要通气以满足氧气需求，并且臭氧化可以提高DOC的去除率，但对于高速率去除而言并不是必需的。已对去除的DOC成分进行了表征，并鉴定和量化了通过生物过程去除的有机化合物部分。 BAC过滤具有以低能耗实现高水平DOC去除的潜力

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