Toxic Cyanobacteria in Drinking Water: Impacts, Detection and Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Use and Scarcity".

Deadline for manuscript submissions: closed (10 November 2022) | Viewed by 5005

Special Issue Editors


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Guest Editor
School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
Interests: cyanobacteria; toxins; odorous compounds; drinking water; oxidation; coagulation; sludge treatment
Special Issues, Collections and Topics in MDPI journals
School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China
Interests: cyanobacterial bloom; drinking water treatment; coagulation; advanced oxidation

Special Issue Information

Dear Colleagues,

Freshwater ecosystems are the most vulnerable to the combined pressure of anthropogenic activities and climate change. In recent years, the excessive proliferation of harmful cyanobacteria in eutrophic lakes and reservoirs has become a major nuisance all over the world, especially with continued global warming. Cyanobacterial blooms increase turbidity and smother submerged aquatic vegetation. Cyanobacterial blooms will cause a cascade of changes in the composition and function of prokaryotic and eukaryotic plankton and thereby lead to declining quality of the aquatic ecosystems and disturb the trophic transmission of the food-web structure. Moreover, some harmful cyanobacteria may produce toxins and unpleasant odorant metabolites that interfere with the recreational function of lakes and the use of reservoirs for drinking water and pose a potential risk to humans and animals. Hence, it is very important to decrease the level of cyanobacterial bloom in freshwater ecosystems and enhance the removal of cyanobacteria and the harmful metabolites in drinking water treatment plants.

Although a great deal of research has been conducted about cyanobacteria control and removal, the mechanisms of cyanobacterial bloom development and technologies for cyanobacteria and harmful metabolites removal are not sufficient, especially for filamentous cyanobacteria and benthic cyanobacteria.

Therefore, this Special Issue on “Toxic Cyanobacteria in Drinking Water: Impacts, Detection and Treatment” aims to publish original research articles and review papers on the toxic cyanobacteria in drinking water sources and drinking water treatment plants, in order to better understand the effect of cyanobacteria on drinking water sources and improve the treatment efficiency of cyanobacteria and harmful metabolites in drinking water treatment plants.

We look forward to receiving your contribution.

Dr. Hangzhou Xu
Dr. Yan Jin
Guest Editors

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Keywords

  • control technology for cyanobacterial bloom simulation
  • prediction and early warning of cyanobacterial bloom
  • global warming and cyanobacterial bloom
  • harmful cyanobacteria detection technology
  • ecological and toxicological effects of harmful cyanobacteria
  • cyanobacteria removal in drinking water treatment process
  • toxin and odorant metabolites mitigation in drinking water treatment process
  • disinfection by-products and cyanobacteria

Published Papers (2 papers)

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Research

20 pages, 3236 KiB  
Article
Factors Affecting the Interpretation of Online Phycocyanin Fluorescence to Manage Cyanobacteria in Drinking Water Sources
by Liya Ma, Saber Moradinejad, Juan Francisco Guerra Maldonado, Arash Zamyadi, Sarah Dorner and Michèle Prévost
Water 2022, 14(22), 3749; https://doi.org/10.3390/w14223749 - 18 Nov 2022
Cited by 5 | Viewed by 2117
Abstract
Recently, in situ YSI EXO2 phycocyanin fluorescence probes have been widely deployed as a means to determine cyanobacterial abundance in drinking water sources, yet few studies have evaluated the effects of natural organic matter (NOM) and the ambient water temperature on the probe [...] Read more.
Recently, in situ YSI EXO2 phycocyanin fluorescence probes have been widely deployed as a means to determine cyanobacterial abundance in drinking water sources, yet few studies have evaluated the effects of natural organic matter (NOM) and the ambient water temperature on the probe readings. In this study, Suwannee River NOM was added to laboratory cultivated cyanobacterial species to test the performance of the phycocyanin probe. The impact of temperature on phycocyanin fluorescence was evaluated by monitoring the laboratory cultivated cyanobacterial species and extracted phycocyanin pigment. Additionally, in situ phycocyanin fluorescence of the field samples from the water intake of a drinking water treatment plant (DWTP) in 2018 were compared with grab sample laboratory taxonomic analyses. We found: (1) the presence of Suwannee River NOM leads to the decrease in cell-bound cyanobacterial phycocyanin readings; (2) increasing ambient water temperature reduces dissolved and cell-bound cyanobacterial phycocyanin readings; (3) field study phycocyanin probe readings significantly correlated with the total cyanobacterial biovolume (R = 0.73, p < 0.1), and the relationship depends on the biovolume of dominant cyanobacterial species; (4) phycocyanin probe readings have a strong positive correlation with the natural light intensities; and (5) probe users should be fully aware of the sources of interferences when interpreting the results and apply the other physical-chemical parameters data simultaneously generated by the fluorometry to improve the probe’s measurements. Full article
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23 pages, 3062 KiB  
Article
Oxidation to Control Cyanobacteria and Cyanotoxins in Drinking Water Treatment Plants: Challenges at the Laboratory and Full-Scale Plants
by Farhad Jalili, Hana Trigui, Juan Francisco Guerra Maldonado, Sarah Dorner, Arash Zamyadi, B. Jesse Shapiro, Yves Terrat, Nathalie Fortin, Sébastien Sauvé and Michèle Prévost
Water 2022, 14(4), 537; https://doi.org/10.3390/w14040537 - 11 Feb 2022
Cited by 3 | Viewed by 2397
Abstract
The impact of oxidation on mitigation of cyanobacteria and cyanotoxins in drinking water treatment sludge was investigated at the laboratory and treatment plant scales. Two common oxidants, KMnO4 (5 and 10 mg/L) and H2O2 (10 and 20 mg/L) were [...] Read more.
The impact of oxidation on mitigation of cyanobacteria and cyanotoxins in drinking water treatment sludge was investigated at the laboratory and treatment plant scales. Two common oxidants, KMnO4 (5 and 10 mg/L) and H2O2 (10 and 20 mg/L) were applied under controlled steady-state conditions. Non-oxidized and oxidized sludge was left to stagnate in the dark for 7 to 38 days. Controlled laboratory trials show that KMnO4 and H2O2 decreased cell counts up to 62% and 77%, respectively. The maximum total MC level reduction achieved after oxidation was 41% and 98% using 20 mg/L H2O2 and 10 mg/L KMnO4, respectively. Stagnation caused cell growth up to 2.6-fold in 8 out of 22 oxidized samples. Microcystin (MC) producer orders as Chroococcales and Synechococcales were persistent while Nostocales was sensitive to combined oxidation and stagnation stresses. In parallel, two on-site shock oxidation treatments were performed in the DWTP’s sludge holding tank using 10 mg/L KMnO4. On-site shock oxidation decreased taxonomic cell counts by up to 43% within 24 h. Stagnation preceded by on-site shock oxidation could increase total cell counts by up to 55% as compared to oxidation alone. The increase of cell counts and mcyD gene copy numbers during stagnation revealed the impact of oxidation/stagnation on cyanobacterial cell growth. These findings show the limitations of sludge oxidation as a strategy to manage cyanobacteria and cyanotoxins in sludge and suggest that alternative approaches to prevent the accumulation and mitigation of cyanobacteria in sludge should be considered. Full article
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