scholarly journals O PROCESSO DE EUTROFIZAÇÃO ARTIFICIAL NO LAGO PARANOÁ, BRASÍLIA, DF

1994 ◽  
Author(s):  
Gustavo Macedo de Mello Baptista ◽  
Mário Diniz de Araújo Neto
Keyword(s):  
Water Quality ◽  
Sewage Treatment ◽  
Federal District ◽  
High Rate ◽  
Field Methods ◽  
Influx Rate ◽  
Sewage Treatment Plants

This paper represent an academic exercise dealing with some index parameters of water quality usinganalytical field methods. In first instance it aims to demonstrate the praticalness of the methods as well asits level of precision. It was possible to estimate the influence of parameters like NO3, pH, OD (dissolvedoxygen), etc. for the determination of water quality of the Paranoá Lake wich serves as recipient of sewagefrom Brasilia and satellite towns of the Federal District/Brazil, with an estimated influx rate of 140 litersper second. Treatment of this quantity of sewage (during the time of our study) is very simple: just passingby a fence system. Conditions of eutrophication of this water body have become worse due to the inflowof clandestine sewage from houses along the the lake-side, wich contributes much to the increase ofnutrients, especially phosphorus and nitrogen.The obtained results were promising and served to stimulate further studies in the course "Practice ofField Studies", even not serving for a definite characterization of the waters. It is important to emphasizethat neither results nor the analysis of the data are focused in this paper.The high rate of eutrophication at the sampling stations can be observed using NO3 e PO4 as parameters.In that sense the following measures are recommended in order to maintain chemical and physicalcharacteristics of the habitat:1 - dredging of organic mud from the bottom of the lake, since it contains 80% of the phosphates ofthe slop, besides other nutrients;2 - expansion or construction of new sewage treatment plants in order to prevent the inflow ofsewage in natura in the lake and to satisfy the demand of the population;3 - control of clandestine sewage of the houses at Lake South and North by the official environmentalprotection agencies punishing house owners with application of heavy fines;4 - development of environmental education programs for scholars of all levels in order to arouse theconscience for preserving of water resources.

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.

scholarly journals Hydrodynamic and water quality modelling of Southern Evoikos Gulf, Greece

2013 ◽  
Vol 1 (2) ◽  
pp. 131-141
Keyword(s):  
Water Quality ◽  
Biological Treatment ◽  
Sewage Treatment ◽  
Water Quality Modelling ◽  
Sewage Treatment Plants ◽  
N Removal ◽  
Limiting Nutrient ◽  
Total Capacity ◽  
P Removal

A mathematical model is presented, consisting of a two-layer, finite difference hydrodynamic submodel and a compartmental water quality sub-model. The model is calibrated with field data. Then, it is applied to Southern Evoikos Gulf, an open coastal water body of particular ecological significance in the region of Attiki, in Greece. The application of the model aims at assessing the effect of three alternative treatment scenarios (i.e. biological treatment, biological treatment with N removal and biological treatment with N and P removal) performed in four sewage treatment plants (of a total capacity of 1,000,000 equivalent population) on the water quality of the Gulf. The calculations show that N is the limiting nutrient and its removal results in an improvement of the quality of the recipient, whereas the additional implementation of P removal has a rather limited impact.

scholarly journals CHARACTERIZATION OF WASTES FROM SEPTAGE COLLECTION AND TRANSPORT TRUCKS IN THE FEDERAL DISTRICT, BRAZIL

2021 ◽  
Vol 9 (1) ◽  
pp. 117
Author(s):  
Adriane Dias da Silva Lisboa ◽  
Yovanka Pérez Ginoris ◽  
Marco Antonio Almeida de Souza
Keyword(s):  
Laboratory Tests ◽  
Sewage Treatment ◽  
Federal District ◽  
Great Variability ◽  
Proper Treatment ◽  
Oil And Grease ◽  
Sewage Treatment Plants ◽  
Distrito Federal ◽  
Grease Trap Waste

<p><strong>Abstract</strong></p><p>In the Federal District of Brazil, the cleaning waste from on-site sanitation facilities is transported by septage trucks to sewage treatment plants (STPs) to be treated in conjunction with sewage. This research aimed to characterize the waste from septage trucks that were discharged in the two STPs in Brasilia, Federal District of Brazil. The methodology included the characterization (sampling and laboratory tests) of waste samples collected from septage trucks that discharged waste at the two STPs in Brasília, and the collection of information on the origin of this waste and the frequency of cleaning the on-site sanitation units. Great variability was found in the frequency of cleaning cesspools and septic tanks. The cleaning of the on-site sanitation facilities took place daily in some places and monthly in the remaining sites, and eventually, facilities with annual cleaning were reported. The characteristic that had the lowest variation coefficient was the pH. The presence of large concentrations of oils and greases in the residues of the septage trucks is a major inconvenience. The results obtained contribute to the knowledge of the characteristics of waste from septage trucks, its management and proper treatment.</p><p><strong>Keywords</strong>: septage; grease trap waste; septage collection and transport truck; oil and grease.</p><p> </p><p align="center">CARACTERIZAÇÃO DOS RESÍDUOS DOS CAMINHÕES LIMPA-FOSSAS NO DISTRITO FEDERAL, BRASIL</p><p><strong>Resumo</strong></p><p>No Distrito Federal, os resíduos da limpeza das instalações de tratamento descentralizado de esgoto são transportados por caminhões limpa-fossas para as estações de tratamento de esgoto (ETEs) para serem tratados em conjunto com o esgoto. Esta pesquisa teve como objetivo caracterizar os resíduos de caminhões limpa-fossas que descarregaram nas duas ETEs de Brasília, Distrito Federal, Brasil. A metodologia incluiu a caracterização (amostragem e exames laboratoriais) de amostras de resíduos coletadas dos caminhões limpa-fossas que descarregaram lodo de fossa nas duas ETEs de Brasília, e a coleta de informações sobre a origem desses resíduos e a frequência de limpeza das unidades de tratamento descentralizado de esgoto. Encontrou-se grande variabilidade nas frequências de limpeza de fossas e tanques sépticos. A limpeza das instalações de tratamento descentralizado de esgotos ocorria diariamente em alguns locais e mensalmente nos demais e, eventualmente, foram registradas instalações com limpeza anual. O pH foi a característica que apresentou o menor coeficiente de variação. A presença de grandes concentrações de óleos e graxas nos resíduos dos caminhões limpa-fossas é um grande inconveniente. Os resultados obtidos contribuem para o conhecimento das características dos resíduos de caminhões limpa-fossas, sua gestão e tratamento adequado.</p><p><strong>Palavras-chave</strong>: lodo de fossas e tanques sépticos; resíduos de caixas de gordura; caminhões limpa-fossas; óleos e graxas.</p>

What Advantages Can Be Expected from the Acceptance of Variable Quality Standards for Sewage Treatment Effluents?

1988 ◽  
Vol 20 (4-5) ◽  
pp. 249-251
Author(s):  
Jacques Bernard
Keyword(s):  
Water Quality ◽  
Sewage Treatment ◽  
Quality Standards ◽  
Quality Level ◽  
Environment Protection ◽  
Economical Benefit ◽  
Quality Objective ◽  
Set Up ◽  
Variable Quality

The flow and the water quality of the rivers vary throughout the year. Very frequently the environment protection authorities set up a quality objective for the river water and this mini mum quality level is constant. So, it wou1d seem possible to accept variable quality standards for plant effluents. A first approach of the problem,by a small French task group,based on three actual cases leads to the provisory conclusion that such a regulation is suitable and presents economical benefit only in some very limit ed cases.

scholarly journals Impact of Hijlan Creek springs on water quality of the Euphrates River and the hydrochemical characterization of the contamination plumes

2021 ◽  
Vol 80 (15) ◽  
Author(s):  
Muwafaq Ayesh Rabeea ◽  
Ahmed J. R. Al-Heety ◽  
Mahmmoud Ismail Mohammed ◽  
Adnan Mohammed Fayydh ◽  
Mohamed Elhag
Keyword(s):  
Water Quality ◽  
Euphrates River ◽  
Hydrochemical Characterization

scholarly journals Some indicators of water quality of the Tamis river

2011 ◽  
Vol 17 (1) ◽  
pp. 107-115 ◽  
Author(s):  
Nada Babovic ◽  
Dejan Markovic ◽  
Vojkan Dimitrijevic ◽  
Dragan Markovic
Keyword(s):  
Water Quality ◽  
Ph Value ◽  
Ammonium Nitrogen ◽  
Field Analysis ◽  
Total Hardness ◽  
Chemical Parameters ◽  
Physico Chemical

This paper shows the results obtained in field analysis performed at the Tamis River, starting from the settlement Jasa Tomic - border between Serbia and Romania to Pancevo - confluence of Tamis into the Danube. The Tamis is a 359 km long river rising in the southern Carpathian Mountains. It flows through the Banat region and flows into the Danube near Pancevo. During the years the water quality of the river has severely deteriorated and badly affected the environment and the river ecosystem. In situ measurements enabled determination of physico-chemical parameters of water quality of the Tamis River on every 400 m of the watercourse, such as: water temperature, pH value, electrical conductivity, contents of dissolved oxygen and oxygen saturation. The main reason of higher pollution of Tamis is seen in connection to DTD hydro system. Sampling was performed at 7 points with regard to color, turbidity, total hardness, alkalinity, concentration of ammonium nitrogen, nitrite nitrogen, nitrate nitrogen, iron, chlorides and sulphates in samples. The aim of the present work was to evaluate water quality in the Tamis River taking into account significant pollution, which originates from settlements, industry and agriculture, and to suggest appropriate preventive measures to further pollution decreasing of the river's water.

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