Seasonal movement of trace-element discharge in a typical south-Indian suburban community

2017 ◽  
Vol 77 (4) ◽  
pp. 1035-1047 ◽  
Author(s):  
Derrick Ian Joshua ◽  
Sumith Abeykoon ◽  
Izumi Watanabe ◽  
Lucyna Paszek ◽  
Keshava Balakrishna ◽  
...  
Keyword(s):  
Treatment Process ◽  
Major Ions ◽  
Sewage Treatment ◽  
Anthropogenic Input ◽  
Sewage Treatment Plants ◽  
Seasonal Movement ◽  
Conventional Activated Sludge ◽  
South Indian ◽  
Pass Through ◽  
Wastewater Samples

Abstract Four conventional activated sludge sewage treatment plants (STPs) in Southern India were chosen to investigate the occurrence of major ions and trace metals in dissolved fraction of the wastewater. Samples were collected from inlet and outlet of STPs during the pre-monsoon and monsoon seasons. Except for a few elements (Mn, Mo and Ni), the concentrations of the rest increased at the outlet of STPs, suggesting that there is an addition of these elements during the treatment process. The increase in concentrations at the STP outlet ranged from 1.25 times for Mn to 3,254 times for Ag during the pre-monsoon. In the monsoon, the increase ranged from 1.75 (Fe) to 1,510 (Ag). This suggests that there is a substantial anthropogenic input of these elements as they pass through the treatment process. Removal rates of elements in STPs also varied. 59% of Mn was removed during the treatment process during pre-monsoon as compared to 67% removal during monsoon.

Occurrence and elimination of antibiotics at four sewage treatment plants in Japan and their effects on bacterial ammonia oxidation

2009 ◽  
Vol 59 (4) ◽  
pp. 779-786 ◽  
Author(s):  
Gopal Chandra Ghosh ◽  
Takashi Okuda ◽  
Naoyuki Yamashita ◽  
Hiroaki Tanaka
Keyword(s):  
Oxygen Uptake ◽  
Nalidixic Acid ◽  
Removal Efficiency ◽  
Treatment Process ◽  
Ammonia Oxidation ◽  
Oxygen Uptake Rate ◽  
Sewage Treatment ◽  
Secondary Treatment ◽  
Mixed Condition ◽  
Sewage Treatment Plants

The occurrence and elimination of seventeen antibiotics (three macrolides: azithromycin, clarithromycin and roxithromycin; five quinolones: ciprofloxacin, enrofloxacin, levofloxacin, nalidixic acid and norfloxacin; five sulfonamides: sulfadimethoxine, sulfadimizine, sulfamerazine, sulfamethoxazole and sulfamonomethoxine; and others: tetracycline, lincomycin, salinomycin and trimethoprim) were investigated at four full-scale sewage treatment plants in Japan. The highest concentration was recorded for clarithromycin (1,129 to 4,820 ng/L) in influent, followed by azithromycin (160 to 1,347 ng/L), levofloxacin (255 to 587 ng/L) and norfloxacin (155 to 486 ng/L). A vary inconsistence picture was obtained with negative to over 90% removal. Nalidixic acid (53 to100%) exhibited higher removal efficiency followed by norfloxacin (75 to 95%), levofloxacin (40 to 90%), ciprofloxacin (60 to 83%) and enrofloxacin (38 to 74%). Among macrolides, clarithromycin (50 to 88%) and azithromycin (34 to 86%) showed relatively higher removal efficiency than roxithromycin (−32 to 59%). For most of the antibiotics removal efficiency was higher in A2O and AO based secondary treatment process than CAS process. The effect of the antibiotics on bacterial ammonia oxidation determined by oxygen uptake rate presented that there was no significant effect below 0.05 mg/L of each antibiotics. Even at the same concentration, antibiotics in mixed condition had higher inhibition effects than individuals.

scholarly journals Surveillance of SARS-CoV-2 in Sewage Treatment Plants between January 2020 and July 2021 in Taiwan

Pathogens ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1611
Author(s):  
Wei-Lun Huang ◽  
Wen-Bin Fann ◽  
Rong-Jun Shen ◽  
Yi Chu ◽  
Jyh-Yuan Yang
Keyword(s):  
Surveillance System ◽  
Sewage Treatment ◽  
Northern Region ◽  
Sewage Treatment Plants ◽  
Two Samples ◽  
Taipei City ◽  
The World ◽  
New Type ◽  
Wastewater Samples ◽  
Different Parts

An outbreak of a new type of coronavirus pneumonia (COVID-19) began in Wuhan, Hubei Province, China, at the end of 2019, and it later spread to other areas of China and around the world. Taiwan reported the first confirmed case from an individual who returned from Wuhan, China, in January 2020 for Chinese New Year. Monitoring microbes in environmental sewage is an important epidemiological indicator, especially for pathogens that can be shed in feces such as poliovirus. We have conducted additional SARS-CoV-2 sewage testing since January 2020 using a well-established poliovirus environmental sewage surveillance system in Taiwan. Wastewater samples were collected from 11 sewage treatment plants from different parts of Taiwan twice a month for laboratory testing. By the end of July 2021, 397 wastewater specimens had been tested, and two samples were positive for SARS-CoV-2. These two wastewater samples were collected in the northern region of Taiwan from Taipei (site A) and New Taipei City (site C) at the beginning of June 2021. This result is consistent with the significant increase in confirmed COVID-19 cases observed in the same period of time. As the pandemic ebbed after June, the wastewater samples in these areas also tested negative for SARS-CoV-2 in July 2021.

Distribution of ammonia-oxidizing bacteria in sewage activated sludge: analysis based on 16S rDNA sequence

2004 ◽  
Vol 50 (8) ◽  
pp. 9-14 ◽  
Author(s):  
T. Limpiyakorn ◽  
Y. Shinohara ◽  
F. Kurisu ◽  
O. Yagi
Keyword(s):  
Activated Sludge ◽  
16S Rdna ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Pcr Amplification ◽  
Ammonia Oxidizing Bacteria ◽  
Conventional Activated Sludge ◽  
Process Configuration ◽  
Nitrosomonas Oligotropha ◽  
Activated Sludge Systems

This study carried out analysis of ammonia-oxidizing bacteria (AOB) communities in 12 sewage activated sludge systems standing in eight sewage treatment plants located in Tokyo. The systems were different in the treatment process configuration: anaerobic/anoxic/aerobic (A2O), anaerobic/aerobic (AO), and conventional activated sludge (AS) processes. AOB communities were analyzed by sequences of 16S rDNA amplicons, which were separated by denaturing gradient gel eletrophoresis (DGGE) after specific polymerase chain reaction (PCR) amplification. The results demonstrated that low ammonium concentrations in the influents of the 12 sewage activated sludge systems resulted in the dominance of Nitrosomonas oligotropha-like sequences. Further, Nitrosomonas europaea- and Nitrosomonas cryotolerans-like sequences were recovered from only one A2O system of which the influent contained higher ammonium and chloride concentrations than those of other systems. Nitrosomonas communis-like sequences were found in every A2O and AO system, but mostly not found in every AS system. In summary, influent characteristics and treatment process configuration affected the AOB communities in the 12 sewage activated sludge systems.

scholarly journals Seasonal Variation in Physico-Chemical and Microbiological Characteristics of Sewage Water from Sewage Treatment Plants

2016 ◽  
Vol 11 (3) ◽  
pp. 791-799
Author(s):  
Karthika Velusamy ◽  
J Kannan
Keyword(s):  
Treatment Process ◽  
State Of The Art ◽  
Sewage Treatment ◽  
Total Coliform ◽  
Sewage Water ◽  
Sampling Point ◽  
Total N ◽  
Sewage Treatment Plants ◽  
Microbiological Characteristics ◽  
Physico Chemical

The present research deals with the study of physico-chemical and bacteriological characteristics of sewage water collected from three different sites of Coimbatore during two consecutive seasons. Seasonal variations indicated that the most of the nutrients (viz., total N, phosphates) and salts (nitrates, chlorides and sulphates) are present abundantly at pre-monsoon and the physical characters like TSS (600 mg/L) are more at post-monsoon. Multiple comparisons made using analysis of variance showed that the Ukkadam sampling point varies significantly from other two points. The total coliform count for the Ukkadam samples were >2400 (MPN/100ml) in raw sewage. This study concludes that the physicochemical characters and microbiological characters are outrageous in the raw sewage and upon the treatment the undesirable characters are reduced. Studies on the sewage characteristics of treatment plants are crucial to know the pollutant levels upon the various time scales and the treatment status which is necessary to improve the state of the art of the treatment process.

Research Progress: Reduction of Excess Sludge by Ozone in the Sewage Biotreatment Process

2012 ◽  
Vol 610-613 ◽  
pp. 2410-2415
Author(s):  
Ya Feng Nie ◽  
Cai Hong Lu ◽  
Bo Liu ◽  
Xiu Wen Qu ◽  
Xiao Bo Bai
Keyword(s):  
Activated Sludge ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Research Progress ◽  
Excess Sludge ◽  
Research Directions ◽  
Sewage Treatment Plants

The principle for the reduction of excess sludge by the ozone in the sewage treatment plants (STPs) was introduced and the change of characteristics of the ozonated sludge was analyzed in this paper. Furthermore, the effects of ozonation of activated sludge on the biotical treatment process in the STP were summarized. At last, the applications of this kind of technology in the worldwide range were enumerated and some further research directions were suggested.

scholarly journals Environmental Occurrence of the Whipple’s Disease Bacterium (Tropheryma whippelii)

1998 ◽  
Vol 64 (2) ◽  
pp. 760-762 ◽  
Author(s):  
Matthias Maiwald ◽  
Frank Schuhmacher ◽  
Hans-Jürgen Ditton ◽  
Axel von Herbay
Keyword(s):  
Sewage Treatment ◽  
Rrna Gene ◽  
Whipple’S Disease ◽  
Whipple's Disease ◽  
16S Rrna Gene Analysis ◽  
Sewage Treatment Plants ◽  
Tropheryma Whippelii ◽  
Systemic Disorder ◽  
Wastewater Samples ◽  
Relationship Of

ABSTRACT Whipple’s disease is a systemic disorder in which a gram-positive rod-shaped bacterium is constantly present in infected tissues. After numerous unsuccessful attempts to culture this bacterium, it was eventually characterized by 16S rRNA gene analysis to be a member of the actinomycetes. The name Tropheryma whippelii was proposed. Until now, the bacterium has only been found in infected human tissues, but there is no evidence for human-to-human transmission. Here we report the detection of DNA specific for the Whipple’s disease bacterium in 25 of 38 wastewater samples from five different sewage treatment plants in the area of Heidelberg, Germany. These findings provide the first evidence that T. whippeliioccurs in the environment, within a polymicrobial community. This is in accordance with the phylogenetic relationship of this bacterium as well as with known epidemiological aspects of Whipple’s disease. Our data argue for an environmental source for infection with the Whipple’s disease bacterium.

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