Evaluation of treated wastewater produced by five different Sewage Treatment Plants using three different technologies - Oman experience

2021 ◽  
pp. 1-21
Author(s):  
Azza Mohsin Al Hashami ◽  
Reginald Victor
Keyword(s):  
Sewage Treatment ◽  
Treated Wastewater ◽  
Sewage Treatment Plants

scholarly journals Risk Assessment Analysis in a Municipal Wastewater Treatment Plant

Proceedings ◽  
2019 ◽  
Vol 16 (1) ◽  
pp. 18
Author(s):  
Magdalena Łój-Pilch ◽  
Anita Zakrzewska ◽  
Ewa Zielewicz
Keyword(s):  
Risk Assessment ◽  
Municipal Wastewater ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Municipal Sewage ◽  
Proper Function ◽  
Municipal Wastewater Treatment ◽  
Sewage Treatment Plants

Risk management, an aspect of which is risk assessment, is a process supporting the proper function of municipal sewage treatment plants. Many factors affect the quality of treated wastewater. Risk assessment, its analysis, and hierarchization permit the elimination of events with the most destructive impacts on the purification process.

scholarly journals EVALUATION OF EFFICIENCY OF TREATMENT FACILITIES CITIES OF TERNOPIL BY THE COMPLEX OF HYDROCHEMICAL PARAMETERS OF THE RIVER SERET

2020 ◽  
Vol 21 ◽  
pp. 94-101
Author(s):  
V. Pashnyuk ◽  
O. Myakush ◽  
L. Sysa
Keyword(s):  
Wastewater Treatment ◽  
Sewage Treatment ◽  
Poor Performance ◽  
Treated Wastewater ◽  
Laboratory Research ◽  
Nitrogen And Phosphorus ◽  
Hydrochemical Parameters ◽  
Sewage Treatment Plants ◽  
Treatment Facilities ◽  
The City

Introduction. The quality of wastewater treatment in settlements is an important task of our time. To assess the efficiency of treatment plants in a particular city often use the hydrochemical parameters of the reservoir into which the treated wastewater is discharged. The paper describes the modern sewerage system of the city of Ternopil and the technological process of operation of citywide sewage treatment plants (STP). The purpose of the work is to find out how effectively the Ternopil STP work and whether their activity poses a danger to the Seret River and the inhabitants of coastal settlements. Methods. Hydrochemical parameters of these water samples were studied in the laboratory according to appropriate regulatory methods. Potentiometric, gravimetric, photometric and other methods of chemical analysis were used for research. Results of the research. 2 samples of water from the river Seret were taken for laboratory research. One sample was taken upstream near the outlet of the drain pipes of these structures, the second sample - downstream. Based on the obtained numerical results of the analyzes, the efficiency of the city's treatment facilities was assessed. It is shown that the overall water quality in the Seret River downstream after the discharge of the city's wastewater treatment  plants is satisfactory. The levels of nitrates and phosphates in the studied samples are almost on the border of the MPC, but this is not necessarily due to the poor performance of the city's treatment facilities. There are many agricultural lands on the banks of the river, which often use nitrogen and phosphorus fertilizers. Significant exceeding of the limit value for chemical oxygen consumption can be explained by the warm season (September). At this time, a lot of biological organic matter has accumulated in natural reservoirs. Conclusions. As a result of researches it is established that treatment facil-ities of the city of Ternopil work in a regular mode and provide sufficient sewage treatment. According to open sources, the annual dynamics of the mentioned treatment facilities is shown. As a result, it has been found that since 2017, the efficiency of the city's wastewater treatment at sewage treatment plants remains stable. Such indicators testify to the sufficient efficiency of the treatment facilities of the Ternopilvodokanal utility company.

Impact of sewage treatment plants and combined sewer overflow basins on the microbiological quality of surface water

2006 ◽  
Vol 54 (3) ◽  
pp. 95-99 ◽  
Author(s):  
A. Rechenburg ◽  
Ch. Koch ◽  
Th. Claßen ◽  
Th. Kistemann
Keyword(s):  
Sewage Treatment ◽  
Microbiological Quality ◽  
Weather Conditions ◽  
Treated Wastewater ◽  
Microbial Indicators ◽  
Sewage Treatment Plants ◽  
Treated Effluent ◽  
Combined Sewer ◽  
Combined Sewage Overflow

In a small river catchment, microbiological quality of different sewage treatment plants under regular conditions and in case of heavy rainfall, when combined sewage overflow basins (CSOs) are activated, was examined regarding microbial indicators and pathogens. In the watercourse, no self-cleaning effects could be observed. Small compact treatment plants discharge treated wastewater with a poor microbiological quality compared to river water quality and the quality of treated wastewater of larger plants. During storm water events, concentrations of microorganisms downstream of sewer overflows were approximately two logs higher than during dry weather conditions. Concentrations of parasites decreased slowly during the overflow, in parallel to filterable matter and particle-bound substances. The annual load of microorganisms originating from CSOs significantly exceeds the load from treated effluent of the sewage plants. Thus, an improved hygienic quality of the water course could be achieved by preventing overflows and by enhancing sewage treatment plants.

Aquatic toxicity emission from Tokyo: wastewater measured using marine luminescent bacterium, photobacterium phosphoreum

1996 ◽  
Vol 33 (6) ◽  
pp. 121-128 ◽  
Author(s):  
Mari Asami ◽  
Noriyuki Suzuki ◽  
Junko Nakanishi
Keyword(s):  
Point Source ◽  
Aquatic Toxicity ◽  
Sewage Treatment ◽  
Photobacterium Phosphoreum ◽  
Treated Wastewater ◽  
Municipal Sewage ◽  
Tokyo Bay ◽  
Sewage Treatment Plants ◽  
Luminescent Bacteria ◽  
Point Source Discharges

Aquatic toxicity of point-source discharges are examined with the MICROTOX system using luminescent bacteria, Photobacterium phosphoreum. Samples include treated wastewaters from industrial dischargers, municipal sewage treatment plants and community sewage treatment plants, all of which eventually flow into Tokyo Bay. Among 34 samples from industry, 11.7% exhibit high toxicity (EC50 =< 0.2), 17.6% exhibit low toxicity (0.2 < EC50 =< 1), and 70.7% were non- or only slightly toxic (1 < EC50). Aquatic toxicity of treated wastewater is mostly due to the chlorination process. Results suggest that 96% of the total toxicity load of all point-source discharges is caused by chlorination. The toxicity assessment with luminescent bacteria is shown to be effective and of practical use, since it facilitates the evaluation of the total toxicity which cannot be well embodied in the current regulation systems by specific indices.

Staphylococci in Polluted Waters and in Waters of Uninhabited Areas

1991 ◽  
Vol 24 (2) ◽  
pp. 103-108 ◽  
Author(s):  
Jukka Ahtiainen ◽  
Maarit Niemi ◽  
Hannele Jousimies-Somer
Keyword(s):  
Staphylococcus Aureus ◽  
Sewage Treatment ◽  
Species Level ◽  
Indicator Bacteria ◽  
Treated Wastewater ◽  
Small Lakes ◽  
Fecal Indicator ◽  
Sewage Treatment Plants ◽  
Agricultural Areas ◽  
Polluted Waters

The aim was to study the occurrence of staphylococci in southern Finland using both the modified Vogel-Johnson (VJP) and the M-5LSMA media in the MF technique. The study involved brooks and small lakes in uninhabited areas and sparsely populated farming areas as well as effluents from sewage treatment plants. Fecal indicator bacteria were determined simultaneously in all these samples. Median colony counts on both of the staphylococcal media in 100 mL samples were 1 to 2 for uninhabited areas, 60 to 110 for agricultural areas and 1000 to 1600 for treated wastewater. The maximum values were much higher in all the environments. The M-5LSMA recovered at least as many staphylococci as the VJP medium, but was more selective. Strains isolated from pristine waters and from wastewater were identified with the API 20 Staph kit. Six different species of staphylococci were recovered on the VJP medium and ten on the M-5LSMA medium. About one third of the isolates could not be identified to species level. Only 2% of the isolates from wastewater were Staphylococcus aureus whereas 18 % of the isolates from uninhabited areas belonged to this species. The identification was confirmed with the coagulase and DNAse tests.

Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operation

2008 ◽  
Vol 37 (2) ◽  
Author(s):  
Maciej Walczak
Keyword(s):  
Water Quality ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sewage Treatment Plants ◽  
Plant Operation ◽  
Treated Sewage ◽  
Microbiological Parameters ◽  
Microbial Indices

Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operationThis paper reports the results of studies of microbiological changes in the water quality of the Vistula and Brda rivers after the opening of sewage treatment plants in Bydgoszcz. The study involved determining the microbiological parameters of water quality. Based on the results obtained, it was found that the quality of the water in both rivers had improved decidedly after the opening of the plants, although an increased number of individual groups of microorganisms was found at the treated sewage outlet from one of the plants.

Effect of Wastewater on the Soil and Irrigation Process: A Laboratory Study

2017 ◽  
Vol 1 (1) ◽  
pp. 46-55 ◽  
Author(s):  
Athar Hussain ◽  
Manjeeta Priyadarshi ◽  
Saif Said ◽  
Suraj Negi
Keyword(s):  
Heavy Metals ◽  
Tap Water ◽  
Sewage Treatment ◽  
Daily Intake ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Surface Water Resources ◽  
Industrial Sewage ◽  
Concentration Levels

Most of the industrial sewage effluents used for irrigation contains heavy metals which cause toxicity to crop plants as the soils are able to accumulate heavy metal for many years. The vegetables grown for the present study were irrigated with treated wastewater brought from a nearby full-scale sewage treatment plant at different compositions along with tap water as a control. The concentration levels of the Cd, Co, Cu, Mn and Zn in the soil were found to below the toxic limits as prescribed in literature. Daily Intake Metals (DIM) values suggest that the consumption of plants grown in treated wastewater and tap water is nearly free of risks, as the dietary intake limits of Cu, Fe, Zn and Mn. The Enrichment Factor for the treated wastewater irrigated soil was found in order Zn> Ni> Pb> Cr> Cu> Co> Mn> Cd. Thus, treated wastewater can be effectively used for irrigation. This will have twofold significant environmental advantages: (1) helpful to reduce the groundwater usage for irrigation and (2) helpful to reduce the stress on surface water resources.

Sign in / Sign up

Export Citation Format

Share Document