Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes

Anawar, Hossain Md and Chowdhury, Rezaul (2020) Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes. Sustainability, 12 (17):7017. pp. 1-18.

[img]
Preview
Text (Published Version)
sustainability-12-07017.pdf
Available under License Creative Commons Attribution 4.0.

Download (1MB) | Preview

Abstract

Selection of appropriate river water treatment methods is important for the restoration of river ecosystems. An in-depth review of different river water treatment technologies has been carried out in this study. Among the physical-engineering processes, aeration is an effective, sustainable and popular technique which increases microbial activity and degrades organic pollutants. Other engineering techniques (water diversion, mechanical algae removal, hydraulic structures and dredging) are effective as well, but they are cost intensive and detrimental to river ecosystems. Riverbank filtration is a natural, slow and self-sustainable process which does not pose any adverse effects. Chemical treatments are criticised for their short-term solution, high cost and potential for secondary pollution. Ecological engineering-based techniques are preferable due to their high economic, environmental and ecological benefits, their ease of maintenance and the fact that they are free from secondary pollution. Constructed wetlands, microbial dosing, ecological floating beds and biofilms technologies are the most widely applicable ecological techniques, although some variabilities are observed in their performances. Constructed wetlands perform well under low hydraulic and pollutant loads. Sequential constructed wetland floating bed systems can overcome this limitation. Ecological floating beds are highly recommended for their low cost, high effectiveness and optimum plant growth facilities.


Statistics for USQ ePrint 39448
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Date Deposited: 10 Sep 2020 04:11
Last Modified: 11 Sep 2020 04:20
Uncontrolled Keywords: polluted river water; water treatment; ecological restoration; constructed wetland; ecological floating bed; biofilm technology
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090508 Water Quality Engineering
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
09 Engineering > 0905 Civil Engineering > 090509 Water Resources Engineering
Fields of Research (2020): 40 ENGINEERING > 4004 Chemical engineering > 400499 Chemical engineering not elsewhere classified
40 ENGINEERING > 4011 Environmental engineering > 401102 Environmentally sustainable engineering
40 ENGINEERING > 4005 Civil engineering > 400513 Water resources engineering
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
D Environment > 96 Environment > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified
Identification Number or DOI: https://doi.org/10.3390/su12177017
URI: http://eprints.usq.edu.au/id/eprint/39448

Actions (login required)

View Item Archive Repository Staff Only