Improving energy efficiency of electrochemical blackwater disinfection through sequential reduction of suspended solids and chemical oxygen demand.

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ID: 108302
2018
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Abstract
Onsite reuse of blackwater requires removal of considerable amounts of suspended solids and organic material in addition to inactivation of pathogens. Previously, we showed that electrochemical treatment could be used for effective pathogen inactivation in blackwater, but was inadequate to remove solids and organics to emerging industry standards. Further, we found that as solids and organics accumulate with repeated recycling, electrochemical treatment becomes less energetically sustainable. Here, we describe a pilot study in which concentrated blackwater is pretreated with ultrafiltration and granular activated carbon prior to electrochemical disinfection, and show that this combination of treatments removes 75-99% of chemical oxygen demand, 92-100% of total suspended solids, and improves the energy efficiency of electrochemical blackwater treatment by an order of magnitude.
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hawkins2018improvinggates Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Hawkins, Brian T;Rogers, Tate W;Davey, Christopher J;Stoner, Mikayla H;McAdam, Ewan J;Stoner, Brian R;
Journal gates open research
Year 2018
DOI
10.12688/gatesopenres.12873.2
URL
Keywords
Activated carbon sustainability ultrafiltration water reuse blackwater electrochemical disinfection

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