The occurrence and fate of chemicals of emerging concern in coastal urban rivers receiving discharge of treated municipal wastewater effluent

2014 ◽  
Vol 33 (2) ◽  
pp. 350-358 ◽  
Author(s):  
Ashmita Sengupta ◽  
J. Michael Lyons ◽  
Deborah J. Smith ◽  
Jörg E. Drewes ◽  
Shane A. Snyder ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Wastewater Effluent ◽  
Urban Rivers ◽  
Treated Municipal Wastewater

scholarly journals Evaluation of treated municipal wastewater effluent for agricultural irrigation purposes using the fuzzy effluent quality index (FEQI)

2019 ◽  
Vol 20 (1) ◽  
pp. 148-156
Author(s):  
Seyed Hesam Alihosseini ◽  
Ali Torabian ◽  
Farzam Babaei Semiromi
Keyword(s):  
Fuzzy Inference System ◽  
Quality Index ◽  
Municipal Wastewater ◽  
Fuzzy Inference ◽  
Treatment Plant ◽  
Wastewater Effluent ◽  
Inference System ◽  
Effluent Quality ◽  
Proposed Model ◽  
Treated Municipal Wastewater

Abstract The issues of freshwater scarcity in arid and semi-arid areas could be reduced via treated municipal wastewater effluent (TMWE). Artificial intelligence methods, especially the fuzzy inference system, have proven their ability in TMWE quality evaluation in complex and uncertain systems. The primary aim of this study was to use a Mamdani fuzzy inference system to present an index for agricultural application based on the Iranian water quality index (IWQI). Since the uncertainties were disregarded in the conventional IWQI, the present study improved this procedure by using fuzzy logic and then the fuzzy effluent quality index (FEQI) was proposed as a hybrid fuzzy-based index. TMWE samples of the Gheitarie wastewater treatment plant in Tehran city recorded from 2011 to 2017 were taken into consideration for testing the ability of the proposed index. The results of the FEQI showed samples categorized as ‘Excellent’ (21), ‘Good’ (10), ‘Fair’ (4), and ‘Marginal’ (1) for the warm seasons, and for the cool seasons, the samples categorized as ‘Excellent’, ‘Good’ and ‘Fair’ were 17, 18 and 1, respectively. Generally, a comparison between the IWQI and proposed model results revealed the FEQI's superiority in TMWE quality assessment.

scholarly journals Removal of Pharmaceuticals, Toxicity and Natural Fluorescence by Ozonation in Biologically Pre-Treated Municipal Wastewater, in Comparison to Subsequent Polishing Biofilm Reactors

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1059
Author(s):  
Kai Tang ◽  
Gordon Ooi ◽  
Aikaterini Spiliotopoulou ◽  
Kamilla Kaarsholm ◽  
Kim Sundmark ◽  
...  
Keyword(s):  
Laboratory Experiments ◽  
Municipal Wastewater ◽  
Vibrio Fischeri ◽  
Biofilm Reactor ◽  
Wastewater Effluent ◽  
Moving Bed Biofilm Reactor ◽  
Biofilm Reactors ◽  
Pharmaceutical Removal ◽  
Natural Fluorescence ◽  
Treated Municipal Wastewater

Ozonation followed by a polishing moving bed biofilm reactor (MBBR) was implemented in pilot and laboratory to remove the residual pharmaceuticals and toxicity from wastewater effluent, which was from a pilot hybrid system of MBBR and activated sludge, receiving municipal wastewater. The delivered ozone dosages achieving 90% pharmaceutical removal were determined both in pilot and laboratory experiments and they were normalised to dissolved organic carbon (DOC), illustrating our findings were comparable with previously published literature. During wastewater ozonation, the intensity of natural fluorescence was found to be greatly associated with the concentrations of the studied pharmaceuticals. In pilot experiments, toxicity, measured by Vibrio fischeri, increased after ozonation at delivered ozone dosages at 0.38–0.47 mg O3/mg DOC and was completely removed by the subsequent polishing MBBR. Laboratory experiments verified that the polishing MBBR was able to remove the toxicity produced by the ozonation.

Developmental toxicity of treated municipal wastewater effluent onBombina orientalis(Amphibia: Anura) embryos

2014 ◽  
Vol 33 (4) ◽  
pp. 954-961 ◽  
Author(s):  
Chan Jin Park ◽  
Hyo Min Ahn ◽  
Seong Chan Cho ◽  
Tae-Hoon Kim ◽  
Jong-Min Oh ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Developmental Toxicity ◽  
Wastewater Effluent ◽  
Treated Municipal Wastewater

Effect of Media on Biofilter Performance Following Ozonation of Secondary Treated Municipal Wastewater Effluent: Sand vs. GAC

2014 ◽  
Vol 37 (2) ◽  
pp. 143-153 ◽  
Author(s):  
Michael J. Reaume ◽  
Rajesh Seth ◽  
Kerry N. McPhedran ◽  
Elizabeth Fidalgo da Silva ◽  
Lisa A. Porter
Keyword(s):  
Municipal Wastewater ◽  
Wastewater Effluent ◽  
Treated Municipal Wastewater

scholarly journals Management Options Supporting a Dual Discharge Strategy for a Major Municipal Wastewater Effluent

2003 ◽  
Author(s):  
Daniel K. Rucinski ◽  
Martin T. Auer ◽  
David W. Watkins, Jr. ◽  
Steven W. Effler ◽  
Rakesh K. Gelda ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Wastewater Effluent ◽  
Management Options

Cultivation of rice for animal feed with circulated irrigation of treated municipal wastewater for enhanced nitrogen removal: comparison of cultivation systems feeding irrigation water upward and downward

2015 ◽  
Vol 72 (4) ◽  
pp. 579-584 ◽  
Author(s):  
A. Muramatsu ◽  
H. Ito ◽  
A. Sasaki ◽  
A. Kajihara ◽  
T. Watanabe
Keyword(s):  
Nitrogen Removal ◽  
Irrigation Water ◽  
Rice Plant ◽  
Municipal Wastewater ◽  
Animal Feed ◽  
Paddy Fields ◽  
Treated Wastewater ◽  
Human Consumption ◽  
Cultivation System ◽  
Treated Municipal Wastewater

To achieve enhanced nitrogen removal, we modified a cultivation system with circulated irrigation of treated municipal wastewater by using rice for animal feed instead of human consumption. The performance of this modified system was evaluated through a bench-scale experiment by comparing the direction of circulated irrigation (i.e. passing through paddy soil upward and downward). The modified system achieved more than three times higher nitrogen removal (3.2 g) than the system in which rice for human consumption was cultivated. The removal efficiency was higher than 99.5%, regardless of the direction of circulated irrigation. Nitrogen in the treated municipal wastewater was adsorbed by the rice plant in this cultivation system as effectively as chemical fertilizer used in normal paddy fields. Circulated irrigation increased the nitrogen released to the atmosphere, probably due to enhanced denitrification. Neither the circulation of irrigation water nor its direction affected the growth of the rice plant and the yield and quality of harvested rice. The yield of rice harvested in this system did not reach the target value in normal paddy fields. To increase this yield, a larger amount of treated wastewater should be applied to the system, considering the significant amount of nitrogen released to the atmosphere.

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