scholarly journals Ecotoxicological and Genotoxic Evaluation of Buenos Aires City (Argentina) Hospital Wastewater

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Anahí Magdaleno ◽  
Ángela Beatriz Juárez ◽  
Valeria Dragani ◽  
Magalí Elizabeth Saenz ◽  
Marta Paz ◽  
...  
Keyword(s):  
Buenos Aires ◽  
Environmental Control ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Effluent Treatment ◽  
Pseudokirchneriella Subcapitata ◽  
Hospital Wastewater ◽  
The Public ◽  
Control Programs

Hospital wastewater (HWW) constitutes a potential risk to the ecosystems and human health due to the presence of toxic and genotoxic chemical compounds. In the present work we investigated toxicity and genotoxicity of wastewaters from the public hospital of Buenos Aires (Argentina). The effluent from the sewage treatment plant (STP) serving around 10 million inhabitants was also evaluated. The study was carried out between April and September 2012. Toxicity and genotoxicity assessment was performed using the green algaePseudokirchneriella subcapitataand theAllium cepatest, respectively. Toxicity assay showed that 55% of the samples were toxic to the algae (%I of growth between 23.9 and 54.8). TheA. cepatest showed that 40% of the samples were genotoxic. The analysis of chromosome aberrations (CA) and micronucleus (MN) showed no significant differences between days and significant differences between months. The sample from the STP was not genotoxic toA. cepabut toxic to the algae (%I = 41%), showing that sewage treatment was not totally effective. This study highlights the need for environmental control programs and the establishment of advanced and effective effluent treatment plants in the hospitals, which are merely dumping the wastewaters in the municipal sewerage system.

scholarly journals Identification of Eco-friendly Practices in the Industries of EGREE Region for Sustainable Development, Andhra Pradesh, India

2021 ◽  
Vol 4 (1) ◽  
pp. 33
Author(s):  
Teki Surayya ◽  
Gudivada Rajendra Prasad ◽  
Arigela Srinivasa Rao ◽  
Jetti Srinivasa Ravisankar ◽  
Matcha Johar Khrisna ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Working Conditions ◽  
Small And Medium Enterprises ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Effluent Treatment ◽  
Coal Consumption ◽  
Estuarine Ecosystem ◽  
Godavari River

This study has been conceived with the basic objective to investigate the role played by industries in the East Godavari River Estuarine Ecosystem (EGREE) region to reduce the level of industrial pollution and other eco-friendly initiatives taken for eco-friendly and sustainable development. Effluent treatment systems prevalent in the majority of the studied industries are in working conditions. 57% of industries' effluent treatment plants are working conditions, 29% of the industries are using landing filling methods for disposal of agro-based waste. There is a strong common understanding among the EGREE region industries to lower the CO2 footprint by substituting coal consumption with bio-fuel. In some companies like ITC, biofuel consumption is 80%, and the remaining 20% is Coal. Government and policymakers have to make provision for industrial waste disposal, especially for small and medium enterprises (SME).  Waste transporting cost is high for SME. Effluent treatment plant (ETP) and sewage treatment plant (STP) conditions to be verified by the pollution control board periodically

scholarly journals Performance of sewage treatment plant with septic tank, anaerobic filter and constructed wetland with Typha spp

2019 ◽  
Vol 14 (7) ◽  
pp. 1
Author(s):  
Paulo Fortes Neto ◽  
Nara Lucia Perondi Fortes ◽  
Elizabeth Da Costa Neves Fernandes de Almeida Duarte ◽  
Rita Do Amaral Fragoso ◽  
Ana Catarina Marcos Henriques ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Constructed Wetland ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Climatic Conditions ◽  
Effluent Treatment ◽  
Septic Tank ◽  
Anaerobic Filter ◽  
Before And After

  The study reports the performance of a sanitary effluent treatment constituted by a septic tank, anaerobic filter and constructed wetland. The study monitored nutrient’s, carbonaceous material’s and thermotolerant coliform’s (CT) removal efficiency during 12 months. The treatment system included a septic tank, an anaerobic filter and a horizontal subsurface flow constructed wetland cultivated with Typha spp. Effluent samples were monthly collected before and after the septic tank, anaerobic filter and wetland. The removal efficiency for N-NH+4 was 37.6%, 66.3% for total P, 37% for COD, 54% for BOD and 99.4% for CT. The anaerobic filter and wetland were more efficient than the septic tank. P-total reduction was higher in the constructed wetland than in the anaerobic filter. Climatic conditions influenced the evaluated constituent’s removal being the highest values during hot months.

scholarly journals ANÁLISE DA EFICIÊNCIA DO TRATAMENTO ANAERÓBIO DA MANIPUEIRA

2021 ◽  
Vol 12 (4) ◽  
pp. 30-37
Author(s):  
Danielle Florindo Pereira ◽  
Debora Yukie Pereira Ishida ◽  
Júlio Kazuya Itimura Omori ◽  
Alexandre Teixeira de Souza
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Anaerobic Treatment ◽  
Domestic Sewage ◽  
Effluent Treatment ◽  
Total Volatile ◽  
Anaerobic Reactor ◽  
Total Solids ◽  
Volatile Solids

In the processes of industrialization of cassava flour (Minihot esculenta), there is the generation of an effluent called manipueira, which requires treatment before being released into the water body. The objective of this work was to evaluate the efficiency of effluent degradation by an anaerobic reactor, using as substrate, manipueira of a flour producing industry, and, as inoculum, two distinct sludges, one from an anaerobic reactor of ascending flow (RAFA) of domestic sewage treatment plant, and another from the activated sludge system of effluent treatment of a grain producing industry. The efficiency of the process was evaluated by the physicochemical parameters: COD, BOD, total solids (TS), total volatile solids (STV), fixed total solids (STF), pH, turbidity and cyanide. Throughout the treatment there was a significant removal of Cyanide in the effluent, that is, one of the major problems of the effluent can be solved effectively via anaerobic treatment.

Green Point Sewage Disposal Options

1992 ◽  
Vol 25 (9) ◽  
pp. 133-142 ◽  
Author(s):  
A. P. M. Fijen ◽  
M. G. Marsden
Keyword(s):  
Public Involvement ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Cape Town ◽  
City Council ◽  
The Public ◽  
Advantages And Disadvantages ◽  
Green Point ◽  
Marine Outfall

In the winter of 1989 severe seas destabilised the 1 700 metre long marine outfall at Green Point which had been commissioned in 1985. Divers had to detach a large section of the outfall to prevent further damage occurring. This resulted in virtually untreated sewage effluent being discharged 280 metres from the rocky shoreline. Public outrage and severe criticism from the media resulted in an emotional and environmentally sensitive issue having to be handled with considerable political and professional skill to enable the determination of the most appropriate solution for Green Point. Independent consultants were appointed by the Cape Town City Council to study basically two options to rectify the situation; reinstating the marine outfall or constructing a conventional sewage treatment plant in close proximity to a densely populated coastal area. This paper discusses the marine option in detail and the advantages and disadvantages of both marine and land options as well as the public involvement and the adopted decision making process. After a comprehensive investigation had identified and explored all aspects and after the public had been fully involved and consulted, the Cape Town City council accepted the City Engineer's recommendation with a vote of 33 to 1, in favour of a new marine outfall.

scholarly journals Influence of organic matter and carbonate on the secondary urban effluents disinfection by UV/H2O2

2018 ◽  
Author(s):  
Ana Ribeiro Neves ◽  
Renato Falcao Dantas ◽  
Jacqueline A. Malvestiti
Keyword(s):  
Organic Matter ◽  
Pure Water ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Effluent Treatment ◽  
Secondary Effluent ◽  
E Coli ◽  
Start Up ◽  
Disinfection Process

The main objective of this research was to study the influence of organic matter and carbonate on UV/H2O2 disinfection, and also to start up the UV/H2O2 reactor to conduct disinfection experiments and to analyze the amount of bacteria (total coliforms and E. coli) during the treatment. The analyzes were carried out with samples from the secondary effluent treatment plant of Faculdade de Tecnologia da Unicamp, the Águas da Serra sewage treatment plant in the city of Limeira and with pure water. The experiments consisted in the treatment of secondary effluent samples ana verify the performance to disinfect analising bacterias in four different times. The relation between the organic matter of the effluent and the disinfection process was studied making a relationship between the bactaria inactivatin and the COD of the effluent. The start up of the UV/H2O2 reactor was positive and allowed the accomplishment of disinfection experiments and later the analysis of concentration of bacteria. For samples from the Águas da Serra effluent, which presented COD of 79 mg/l, the disinfection was extremely efficient with different concentrations of peroxide and there was no indication of the presence of coliforms from the first 10 minutes of treatment.

scholarly journals Retention efficiency of the sewage treatment plant of Trenque Lauquen city (Buenos Aires)

2021 ◽  
Vol 31 (1) ◽  
pp. 25-34
Author(s):  
Alberto Pilati ◽  
◽  
Germán Fresia ◽  
Keyword(s):  
Buenos Aires ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Retention Efficiency

La planta de tratamientos de líquidos cloacales de Trenque Lauquen fue creada en 1992 cuando la población era sustancialmente menor. El objetivo fue determinar la eficiencia de retención de la misma ya que sus efluentes podrían causar un fuerte impacto negativo sobre el cuenco receptor. Para evaluar la eficiencia en condiciones extremas de temperatura, se tomaron muestras de sólidos suspendidos totales (SST), clorofila, y nitrógeno (NT) y fósforo (PT) totales a lo largo de la planta en invierno y verano. Se encontró que el pozo Imhoff retiene 2437 % de SST y siempre retuvo el 100 % de los sólidos suspendidos inorgánicos. Si bien la planta retuvo entre 1120 % de NT y 1117 % de PT, los valores de descarga de la planta (2341 mgNT/L y 3,94,1 mgPT/L) todavía exceden lo permitido por la ley. Las variaciones en la retención entre estaciones contrastantes se debió principalmente a un aumento de la actividad biológica en verano. La eficiencia de retención podría mejorarse con el uso de fitorremediadores, realizando tareas de mantenimiento y ampliación de las instalaciones actuales.

Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

2020 ◽  
Vol 15 (2) ◽  
pp. 142-151
Author(s):  
Peter Lukac ◽  
Lubos Jurik
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Phosphorus Recovery ◽  
Anaerobic Sludge ◽  
Biological Phosphorus Removal ◽  
The Mean

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

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.

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