Domestic wastewater treatment with purple phototrophic bacteria using a novel continuous photo anaerobic membrane bioreactor

Huelsen, Tim, Barry, Edward M., Lu, Yang, Puyol, Daniel, Keller, Jürg and Batstone, Damien J. (2016) Domestic wastewater treatment with purple phototrophic bacteria using a novel continuous photo anaerobic membrane bioreactor. Water Research, 100 486-495. doi:10.1016/j.watres.2016.04.061


Author Huelsen, Tim
Barry, Edward M.
Lu, Yang
Puyol, Daniel
Keller, Jürg
Batstone, Damien J.
Title Domestic wastewater treatment with purple phototrophic bacteria using a novel continuous photo anaerobic membrane bioreactor
Journal name Water Research   Check publisher's open access policy
ISSN 1879-2448
0043-1354
Publication date 2016-09-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.watres.2016.04.061
Open Access Status Not Open Access
Volume 100
Start page 486
End page 495
Total pages 10
Place of publication London, United Kingdom
Publisher I W A Publishing
Collection year 2017
Language eng
Formatted abstract
A key future challenge of domestic wastewater treatment is nutrient recovery while still achieving acceptable discharge limits. Nutrient partitioning using purple phototrophic bacteria (PPB) has the potential to biologically concentrate nutrients through growth. This study evaluates the use of PPB in a continuous photo-anaerobic membrane bioreactor (PAnMBR) for simultaneous organics and nutrient removal from domestic wastewater. This process could continuously treat domestic wastewater to discharge limits (<50 mgCOD L-1, 5 mgN L-1, 1.0 mgP L-1). Approximately 6.4 ± 1.3 gNH4-N and 1.1 ± 0.2 gPO4-P for every 100 gSCOD were removed at a hydraulic retention time of 8-24 h and volumetric loading rates of 0.8-2.5 COD kg m3 d-1. Thus, a minimum of 200 mg L-1 of ethanol (to provide soluble COD) was required to achieve these discharge limits. Microbial community through sequencing indicated dominance of >60% of PPB, though the PPB community was highly variable. The outcomes from the current work demonstrate the potential of PPB for continuous domestic (and possibly industrial) wastewater treatment and nutrient recovery. Technical challenges include the in situ COD supply in a continuous reactor system, as well as efficient light delivery. Addition of external (agricultural or fossil) derived organics is not financially nor environmentally justified, and carbon needs to be sourced internally from the biomass itself to enable this technology. Reduced energy consumption for lighting is technically feasible, and needs to be addressed as a key objective in scaleup.
Keyword COD
Domestic wastewater
Nutrient recovery
Purple phototrophic bacteria
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Advanced Water Management Centre Publications
 
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