scholarly journals Study on small-to-medium-sized sewage treatment plants. Mainly on selection of treatment process.

1986 ◽  
Vol 15 (6) ◽  
pp. 486-491
Author(s):  
TOSEN RYU
Keyword(s):  
Treatment Process ◽  
Sewage Treatment ◽  
Sewage Treatment Plants ◽  
Selection Of

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 Application of Multi-Criteria Analysis in the Selection of Individual Sewage Treatment Plants

2021 ◽  
Vol 9 (1) ◽  
pp. 27
Author(s):  
Natalia Taraszkiewicz
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Good Alternative ◽  
Living Standards ◽  
Biological Wastewater Treatment ◽  
Daily Lives ◽  
Sewage Treatment Plants ◽  
Sewage Systems ◽  
Selection Of

The development of sewage systems leads to an increase in people’s living standards and an improvement in the comfort of their daily lives. In 2021, the use of septic tanks is still a big issue; many of them are not properly sealed and can be harmful to the environment because of leakage. A good alternative for them is an individual sewage treatment plant. There are many types of such investment. This paper focuses on the selection between three types of sewage treatment plants (a biological wastewater treatment plant with activated sludge and a constructed wasteland) using MCDA–AHP and TOPSIS methods.

scholarly journals Sanitary sewage

2021 ◽  
Vol 17 (5) ◽  
Author(s):  
Isadora Vitali Lobo ◽  
Juliana Heloisa Pinê Américo-Pinheiro
Keyword(s):  
Emerging Contaminants ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Municipal Sewage ◽  
Sewage Treatment Plants ◽  
Physical Chemical ◽  
Treatment And Disposal ◽  
Domestic Effluent ◽  
Research Period ◽  
Selection Of

The treatment and disposal of domestic sewage is one of Brazil's main challenges. Sewage composition varies with the habits of the population and the frequency with which new contaminants are released into the environment. This study is a bibliographical review of the main aspects related to the characterization and composition of sanitary sewage, types of sewage treatment systems and pertinent legislation; and toxicity of domestic effluents. The review was based on publications available on Science Direct, Google Scholar and Scielo, as well as on printed publications, relevant legislation, and normative instructions. The research period adopted for the selection of publications was from 2005 to 2021. We found out that, in addition to the levels of organic matter from domestic sewage, residues from products used in daily life, such as pharmaceuticals and cleaning products, can be found in effluents in concentrations harmful to the environment. Often, the types of treatment used in municipal sewage treatment plants do not efficiently remove these contaminants. Thus, even if sewage is treated to meet the limits required for the physical-chemical and biological parameters established by law, domestic effluent can present a high potential for toxicity to various aquatic species such as microcrustaceans, mollusks and fish. Thus, ecotoxicological analyses represent a remarkable mechanism for indicating the efficiency of removal of emerging contaminants present in treated sanitary effluent, in addition to indicating the deleterious effects caused by these residues to the environment and ecosystems associated with the receiving water body.

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.

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.

scholarly journals Beauty in Eco-Technology – A Sewage Treatment Plant as a Spatially Attractive Structure

2018 ◽  
Vol 65 ◽  
pp. 05002
Author(s):  
Agnieszka Wójtowicz-Wróbel
Keyword(s):  
Good Practice ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Domestic Water ◽  
Sewage Treatment Plants ◽  
Suburban Areas ◽  
Urban Engineering ◽  
Intensive Development ◽  
Selection Of

The increasing awareness of the protection of depleting natural resources results in new challenges for us to face. The necessity to treat domestic water is one of such basic challenges. The intensive development of modern technological solutions in this field creates new possibilities - including those related to the architectural shaping of structures. Simultaneously - following the example of other municipal infrastructure buildings - thanks to the development of technology - sewage treatment plants become structures that are more accessible and spatially attractive. The goal of this article is to answer the question whether these types of urban engineering elements can constitute a structure that is spatially attractive in terms of the tissue of urban and suburban areas, and if so, then under what conditions? The study was performed using a method of analysing a selection of structures in Poland (the first part of the article), in addition to an analysis of examples of good practice regarding such projects in other countries, which constitute state of the art aesthetic solutions in this regard (the second part of the article). The result of the study will allow finding the answer to the question: what is it that causes some sewage treatment plants to have the opportunity to become a significant spatial element, while others only fulfil their technological functions? The results of the analyses performed by the author could form the basis for performing comparative studies of this scope on other examples, including both sewage treatment plants, as well as other municipal infrastructure buildings of a city.

scholarly journals Accessibility of Sewage Treatment Plants - Benefits and Limitations Associated with Their Location Requirements

2018 ◽  
Vol 65 ◽  
pp. 05005
Author(s):  
Agnieszka Wójtowicz-Wróbel
Keyword(s):  
Negative Impact ◽  
Sewage Treatment ◽  
Sensu Stricto ◽  
Municipal Sewage ◽  
Urban Structure ◽  
Analysis Method ◽  
Sewage Treatment Plants ◽  
Specific Location ◽  
Developing Cities ◽  
Selection Of

Due to their specifics, municipal sewage treatment plants have highly specific location requirements. It is, without a doubt, a limitation in relation to the possibility of using these types of plants within an urban structure. On the other hand, in modern, intensively developing cities and the more and more intense incorporation of external areas into - sensu stricto - urban tissue, accessibility and a potentially attractive riverside location create new opportunities. They support new technological solutions that lessen the possible negative impact of such structures. The goal of this article is to highlight which characteristics related to location and other factors are responsible for the possibility of attractively incorporating sewage treatment plants into an urban structure, and which characteristics cause these structures to be excluded from opportunities enabling their wider spatial employment. Accessibility studies, as well as analyses of other elements will be performed using the comparative analysis method, focusing on a selection of examples of sewage treatment plants in large Polish cities. Conclusions about location conditions will be drawn on the basis of the study, which can serve to perform comparative analyses both in cases of sewage treatment plants in other cities, as well as other municipal technical infrastructure plants, whose location is dependent on their function.

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