Performance Assessment of Domestic Wastewater Treatment Plants Operating on Different Technologies

Delhi, the most populated city in the country, is the capital of India. The huge population, urbanization and industrial processes contribute to degradation of water quality which is further aggravated by direct disposal of untreated domestic wastewater into the river Yamuna. In Delhi, the sewerage system is badly affected by improper management of the drainage system and insufficient installation of sewers in undeveloped as well as slum areas of the city which degrade the surface water quality of Yamuna River and create unhygienic conditions for the increasing population. In this study, three sewage treatment plants (STPs) have been selected which are situated at Najafgarh, Delhi Gate and Shahdara based on different technologies like Extended Aeration (EA), Biological Filtration and Oxygenated Reactor (BIOFOR) and Phytorid in order to assess the quality of wastewater before and after treatment and determining the removal efficiencies of various parameters. The study reveals that the performance of Delhi Gate and Shahdara STPs based on BIOFOR and Phytorid technologies are more efficient for the treatment of the municipal wastewater which can be further be safely disposed off into surface water and can be used for non-domestic purposes like irrigation, agriculture, cleaning of parks and streets. The effluent quality of Najafgarh STP based on EA technology is found to be less efficient as compared to the BIOFOR and Phytorid technologies. Hence, it is required to be operated and maintained properly with close supervision so as to achieve effluent quality standards as prescribed by the Indian standards

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Surface water quality in the Mastnik stream catchment area: The situation in the Czech countryside

Geografie ◽

10.37040/geografie2018123040479 ◽

2018 ◽

Vol 123 (4) ◽

pp. 479-505

Author(s):

Luboš Mrkva ◽

Bohumír Janský

Keyword(s):

Water Quality ◽

Surface Water ◽

Wastewater Treatment Plants ◽

Stream Water ◽

Surface Water Quality ◽

Gradual Improvement ◽

Stream Flows ◽

Using Data ◽

The Impact

Despite major investments into the remediation of wastewater, and the reduction of fertilizers, the quality of small river surface water in agricultural and rural regions of Czechia is still very low. The Mastník stream flows through an agricultural area before combining with the Vltava river; a portion of the Mastník stream water inevitably terminates in the Slapy Reservoir. The quality of the water has been analyzed using data from indicator concentrations from both the Vltava River Basin Authority study profiles, and the author’s monitoring profile. The data show that the steps that have been taken – primarily the construction of wastewater treatment plants – have led to a gradual improvement in the surface water quality by some parameters. Presently, a growing concentration of chlorophyll–α and a lack of dissolved oxygen are influencing the final quality of the water. In the case of the Mastník stream, it is particularly necessary to improve the remediation of wastewater from small households, and to reduce the impact of water erosion on agricultural soil.

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Assessment of Impacts of Acid Mine Drainage on Surface Water Quality of Tweelopiespruit Micro-Catchment, Limpopo Basin

Water Quality ◽

10.5772/65810 ◽

2017 ◽

Cited By ~ 1

Author(s):

Bloodless Dzwairo ◽

Munyaradzi Mujuru

Keyword(s):

Water Quality ◽

Surface Water ◽

Acid Mine Drainage ◽

Mine Drainage ◽

Surface Water Quality ◽

Acid Mine

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Assessment of Spatial Variations in Surface Water Quality of Kyeongan Stream, South Korea Using Multi-Variate Statistical Techniques

Alliance for Global Sustainability Bookseries - Sustainability in Food and Water ◽

10.1007/978-90-481-9914-3_5 ◽

2010 ◽

pp. 39-48 ◽

Cited By ~ 1

Author(s):

Janice B. Sevilla ◽

Chang Hee Lee ◽

Bum Yeon Lee

Keyword(s):

Water Quality ◽

Surface Water ◽

South Korea ◽

Surface Water Quality ◽

Spatial Variations ◽

Statistical Techniques

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Dynamics of changes in surface water quality indicators of the Western Bug River basin within Ukraine using GIS technologies

Journal of Water and Land Development ◽

10.2478/jwld-2019-0046 ◽

2019 ◽

Vol 42 (1) ◽

pp. 67-75 ◽

Cited By ~ 1

Author(s):

Igor Gopchak ◽

Tetiana Basiuk ◽

Ihor Bialyk ◽

Oleg Pinchuk ◽

Ievgenii Gerasimov

Keyword(s):

Water Quality ◽

Surface Water ◽

Environmental Assessment ◽

Land Surface ◽

Surface Water Quality ◽

Ecological Condition ◽

Toxic Substances ◽

Ecological Index ◽

Gis Technologies

Abstract The environmental assessment of the surface water quality of the Western Bug River has been made using the system of classification quality of land surface water of Ukraine in accordance with the approved methodology, which allows comparing water quality of separate areas of water objects of different regions. The calculation of the environmental assessment of water quality has been carried according to three blocks: block of salt composition, block of trophic and saprobic (ecological and sanitary) indicators and block of indicators of content of specific toxic substances. The results are presented in the form of a combined environmental assessment, based on the final conclusions of the three blocks and consists in calculating the integral ecological index. Comprehensive studies of changes in the water quality of the Western Bug River have been conducted within the territory of Ukraine for a long-term period. The water quality of the river on the final values of the integral indicators of the ecological condition corresponded mainly to 4nd category of the 3rd class – the water is “satisfactory” by condition and “little polluted” by degree of purity (except for points of observation that located within the Volyn region, where the water quality corresponded to 3rd category and the 2nd class. It is “good” by condition and “fairly clean” by the degree of purity). Visualization and part of the analysis are performed using GIS technologies in the software of the ArcGIS 10.3.

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