Optimal design of an electrochemical reactor for blackwater treatment

Optimal design of an electrochemical reactor for blackwater treatment

Electrolysis of blackwater for disinfection and nutrient removal is a portable and scalable technology that can lessen the need for cities to construct large‐scale wastewater treatment infrastructure and enable the safe onsite reuse of blackwater. Several systems for treating wastewater from single...

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Bibliographic Details
Published in:Water environment research Vol. 93; no. 1; pp. 148 - 158
Main Authors: Varigala, Siva, Krishnaswamy, Srinivas, Lohia, Chandra P., Hegarty‐Craver, Meghan, Grego, Sonia, Luettgen, Michael, Cid, Clement A.
Format: Journal Article
Language:English
Published: United States Blackwell Publishing Ltd 01-01-2021
John Wiley and Sons Inc
Subjects:
Automation
Blackwater
blackwater treatment
Chlorine
Cities
Cleaning
Computer applications
Design optimization
Disinfection
Dynamic analysis
Electrochemistry
electrode cleaning
Electrodes
Electrolysis
Flaking
Injection
Maintenance
mineral deposits
Nutrient removal
Polarity
Precipitates
Reactor design
Reactors
reverse polarity
Toilets
uniform mixing
Waste Disposal, Fluid
Waste Water
Wastewater treatment
Cities
blackwater treatment
electrode cleaning
mineral deposits
uniform mixing
reverse polarity
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Summary:Electrolysis of blackwater for disinfection and nutrient removal is a portable and scalable technology that can lessen the need for cities to construct large‐scale wastewater treatment infrastructure and enable the safe onsite reuse of blackwater. Several systems for treating wastewater from single toilets are described in the literature, but there are few examples of systems designed to use electrolysis to treat blackwater from nearby toilets, which is a situation more common in densely packed urban living environments. In order to scale a single toilet electrolysis system to one that could service multiple toilets, computational fluid dynamic analysis was used to optimize the electrochemical reactor design, and laboratory and field‐testing were used to confirm results. Design efforts included optimization of the reactor shape and mixing to improve treatment efficiency, as well as automated cleaning and salt injection to reduce maintenance and service requirements. Practitioner points Design of a reverse polarity mechanism to enable in situ electrode cleaning and improve long‐term electrode performance. Optimization of a hopper design and drainpipe location to collect and remove flaking precipitates and mitigate maintenance issues. Design of an automated salt injection system to guarantee sufficient chloride levels for producing adequate chlorine residuals for consistent disinfection. Optimized electrochemical reactor for blackwater treatment.
Bibliography:This article is part of the special issue on Electrochemical Treatment
ISSN:1061-4303
1554-7531
DOI:10.1002/wer.1374