Study on bioremediation of eutrophic lake

Shan, Mingjun; Wang, Yanqiu; Xue, Sheng

doi:10.1016/s1001-0742(09)60027-9

Cited by 24 publications

(10 citation statements)

References 2 publications

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“…The use of carriers (AquaMats and semi flexible supports), in combination with aeration, played a vital role in the decontamination of river water [86]. The microbial agents, composed of nitrobacteria, mixed bacteria and humic acid efficiently removed TN, TP, NH 4 -N, COD and turbidity from surface water [87].…”

Section: Application Of Microbial Agentsmentioning

confidence: 99%

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

Anawar

Chowdhury

2020

Sustainability

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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.

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Section: Application Of Microbial Agentsmentioning

confidence: 99%

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

Anawar

Chowdhury

2020

Sustainability

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“…Modification of the N cycle and the removal of dissolved P are the key to successful rehabilitation of eutrophic water bodies because excess N and P input induces algae growth 9 , 18 . In this research, the ammonia concentration decreased during the operation period.…”

Section: Resultsmentioning

confidence: 99%

“…Many technologies have been used for in situ rehabilitation of natural water bodies. These include physical and chemical methods (e.g., sewage interception, sediment dredging 6 , exchanges with fresh water, bypass treatment 7 , artificial aeration 8 , and biological methods such as phytoremediation 9 . However, these methods are often unsuitable due to disadvantages such as costs and the secondary transfer of pollutants.…”

Section: Introductionmentioning

confidence: 99%

Ecosystem activation system (EAS) technology for remediation of eutrophic freshwater

Chai

et al. 2017

Sci Rep

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Ecosystem activation system (EAS) was developed to create beneficial conditions for microbiome recovery and then restore and maintain the ecological integrity (microbial community, phytoplankton, zooplankton) for eutrophic freshwater rehabilitation. A 30 day’s filed test of EAS indicated that over 50% of contaminant was removed and the algae visibly disappeared. EAS treatment 2.5-fold increased the diversity of microbial community and changed the microbial community structure (e.g., two and three-fold decrease in the amount of Flavobacterium and Pseudomonas, typical abundant species of eutrophic freshwater, respectively). Further, the diversity of phytoplankton and zooplankton of treated water suggested that these species were diverse. Representative phytoplankton of eutrophic freshwater, Chlorella and Chlamydomonas were undetectable. The possible mechanism of EAS is restoring the trophic levels of the water body via bottom-up approach by microbial community.

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“…Group M (Microcystis) could grow in the eutrophic to hypertrophic conditions in small to medium-sized lakes, which would occur as the colonies of different sizes under natural conditions. It would cause serious environmental and ecological problems in temperate and tropical freshwater ecosystems [54]. Group P (Staurastrum, Peridinium) were able to live in eutrophic waters with mild light, and they favored the high transparency [25,55].…”

Section: Discussionmentioning

confidence: 99%

An Enhanced System with Macrophytes and Polyurethane Sponge as an Eco-Technology for Restoring Eutrophic Water: A Pilot Test

Wang

Yin

Cai

et al. 2019

Water

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Water eutrophication is one of the most serious environmental problems in urban lakes and ponds due to the excessive nutrients. To deal with this problem, the development of methods for supporting ecological rehabilitation has been undertaken. Meanwhile, the trophic interactions during rehabilitation also have been analyzed. In this study, a new technique was employed to solve the water eutrophication problems in an urban pond. To evaluate the water eutrophication at a pilot scale, an enhanced artificial floating-type biological treatment system (FBTS) composed of a floating bed, macrophyte, artificial biofilm carrier (polyurethane sponge) and aerator could be used as equipment for urban pond remediation. In addition, FBTS was employed to decrease the total nitrogen (TN), ammonia-nitrogen (NH3-N), total phosphorus (TP) and chemical oxygen demand (COD) in water. Meanwhile, the changes of water qualities were monitored in the remediation process, and differences in phytoplankton functional group diversity were also registered. Cyanobacteria would decrease after the removal of P, and the diatom assemblage composition changed. The dominant species Cyanophyta were transformed to co-existed with Bacillariophyta, Pyrrophyta and Chlorophyta due to the improvement of water quality. Consequently, this new FBTS could be a promising eco-technology for the removal of nitrogen and phosphorus from eutrophic water, and even could promote the phytoplankton succession.

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Study on bioremediation of eutrophic lake

Cited by 24 publications

References 2 publications

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

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

Ecosystem activation system (EAS) technology for remediation of eutrophic freshwater

An Enhanced System with Macrophytes and Polyurethane Sponge as an Eco-Technology for Restoring Eutrophic Water: A Pilot Test

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