Imperial College London
Portrait Picture

Emeritus ProfessorNigelGraham

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Research Investigator
 
 
 
//

Contact

 

n.graham Website

 
 
//

Assistant

 

Miss Judith Barritt +44 (0)20 7594 5967

 
//

Location

 

406Skempton BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Liu:2023:10.1016/j.watres.2023.120089,
author = {Liu, M and Graham, N and Xu, L and Zhang, K and Yu, W},
doi = {10.1016/j.watres.2023.120089},
journal = {Water Research},
title = {Bubbleless aerated-biological activated carbon as a superior process for drinking water treatment in rural areas},
url = {http://dx.doi.org/10.1016/j.watres.2023.120089},
volume = {240},
year = {2023}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Drinking water supply in rural areas remains a substantial challenge due to complex natural, technical and economic conditions. To provide safe and affordable drinking water to all, as targeted in the UN Sustainable Development Goals (2030 Agenda), low-cost, efficient water treatment processes suitable for rural areas need to be developed. In this study, a bubbleless aeration BAC (termed ABAC) process is proposed and evaluated, involving the incorporation of a hollow fiber membrane (HFM) assembly within a slow-rate BAC filter, to provide dissolved oxygen (DO) throughout the BAC filter and an increased DOM removal efficiency. The results showed that after a 210-day period of operation, the ABAC increased the DOC removal by 54%, and decreased the disinfection byproduct formation potential (DBPFP) by 41%, compared to a comparable BAC filter without aeration (termed NBAC). The elevated DO (> 4 mg/L) not only reduced secreted extracellular polymer, but also modified the microbial community with a stronger degradation ability. The HFM-based aeration showed comparable performance to 3 mg/L pre-ozonation, and the DOC removal efficiency was four times greater than that of a conventional coagulation process. The proposed ABAC treatment, with its various advantages (e.g., high stability, avoidance of chemicals, ease of operation and maintenance), is well-suited to be integrated as a prefabricated device, for decentralized drinking water systems in rural areas.
AU  - Liu,M
AU  - Graham,N
AU  - Xu,L
AU  - Zhang,K
AU  - Yu,W
DO  - 10.1016/j.watres.2023.120089
PY  - 2023///
SN  - 0043-1354
TI  - Bubbleless aerated-biological activated carbon as a superior process for drinking water treatment in rural areas
T2  - Water Research
UR  - http://dx.doi.org/10.1016/j.watres.2023.120089
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001012439100001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://www.sciencedirect.com/science/article/pii/S0043135423005250
UR  - http://hdl.handle.net/10044/1/108268
VL  - 240
ER  -
Download