scholarly journals Percentage of the population connected to a wastewater treatment plan (2008-2012)

2017 ◽  
Author(s):  
Gabin Archambault
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Latin America ◽  
Wastewater Treatment Plant ◽  
Treatment Plan ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
The Pacific ◽  
The Caribbean ◽  
Water Waste

This layer represents the percentage of the population who is connected to a wastewater treatment plan for 36 countries (29 in Europe and North America, 3 in Asia and the Pacific, 3 in Latin America and the Caribbean, and 1 in Africa). However, data are available from 1975 to 2014 for 37 countries. This indicator presents sewage treatment connection rates, i.e. the percentage of the population connected to a wastewater treatment plant. “Connected” means actually connected to a wastewater treatment plant through a public sewage network. It does not take into account independent private facilities, used where public systems are not economic. For more information, visit the OECD database: https://data.oecd.org/water/waste-water-treatment.htm Waste

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.

Life Cycle Assessment of Urban Wastewater Treatment

2014 ◽  
Vol 535 ◽  
pp. 346-349
Author(s):  
Mei Wang ◽  
Ming Yang ◽  
Jun Liu ◽  
Jian Fen Li
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Wastewater Treatment Plant ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Urban Wastewater ◽  
Urban Sewage ◽  
Urban Wastewater Treatment ◽  
Whole Life Cycle

Effect and benefits of a product or service could be analyzed and evaluated by life cycle assessment during the whole life cycle. Urban sewage treatment plants could improve and control urban water pollution escalating, but it also had certain harm to environment. Effect and benefits of urban wastewater treatment plant A and B were analyzed and evaluated, 13 factors were selected, and comprehensive benefits were researched quantificationally using the method of analytic hierarchy process. It found that urban wastewater treatment plant A who applied A/O process had better benefits than urban wastewater treatment plant B who applied BIOLAK process.

scholarly journals Quality Assessment of Full-Scale Municipal Wastewater Treatment Plant Consisting UASB Reactors and Polishing Ponds During its Start-Up Phase in India

2016 ◽  
Vol 11 (1) ◽  
pp. 47-55
Author(s):  
Nadeem Khalil ◽  
Tarique Ahmad
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Quality Assessment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Anaerobic Sludge ◽  
General Hypothesis ◽  
Start Up ◽  
Uasb Reactors

Amongst the technologies available, the up flow anaerobic sludge blanket (UASB) process has been one of the most widely applied methods for municipal waste water treatment especially in countries of warm climatic conditions like India. However, past about one decade has witnessed rapid decline in the UASB popularity and its implementation. There has been criticism from various sections on the performance of UASB reactors for not complying with the prescribed discharge standards. It is a general hypothesis that the UASB reactors are not meant for diluted waste water like municipal sewage when typically the BOD is less than 150 mg/l, COD 250 mg/l and sulphates are more than 150mg/l. An attempt has been made through this study to investigate the reasons on the basis of quality assessment and field observations on UASB reactors and it’s post-treatment of a newly commissioned (start-up) municipal (sewage) wastewater treatment plant commonly called ‘STP’ having capacity of 14 million litres per day (MLD). Study was aimed to know the gaps during the commissioning stage which could be related to poor removal efficiencies. This paper briefly discusses some issues related to operation and maintenance of the UASB plants with purpose for improvements.

scholarly journals Solutions for increasing the quality of hydro-technical building elements obtained by numerical simulation

2019 ◽  
Vol 85 ◽  
pp. 02011
Author(s):  
Alexandru Fodorean ◽  
Adrian Cureu ◽  
Oana Giurgiu ◽  
Dan Opruţa
Keyword(s):  
Waste Water ◽  
Numerical Simulation ◽  
Wastewater Treatment ◽  
Numerical Simulations ◽  
Numerical Models ◽  
Waste Water Treatment ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Design Phase

Sewage treatment remains a delicate subject and requires technical improvements to increase the efficiency of the systems responsible for the treatment. Numerical simulations are also a very useful tool, especially if they are used during the design phase. Thus, the paper aims to present the results obtained by CFD numerical simulations in the case of an important element within an existing wastewater treatment plant, namely the waste water treatment well, thus obtaining constructive solutions of a better functionally to the designed version. Through these, the work demonstrates the necessity of analyzes with CFD methods during design of the main elements of hydrotechnical constructions, but also the necessity of adjusting the numerical models with results obtained from experiments, measurements. The results show that the modifications described in the paper would bring significant improvements in waste disposal.

Sewage Wastewater Treatment Plant Inverted AAO Process Design

2014 ◽  
Vol 1079-1080 ◽  
pp. 480-483
Author(s):  
Li Wang
Keyword(s):  
Wastewater Treatment ◽  
Process Design ◽  
Wastewater Treatment Plant ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Structure Design ◽  
Main Task ◽  
The City

The graduation design topic for a sewage treatment plant processesdesign - inverted AAO process in durian. Main task is tantamount to designaccording to the requirement of the nature of the city sewage, sewage, scalepreliminary design to complete sewage treatment plant and single processing structure design.

scholarly journals Wastewater Treatment Plant and Wetland Design Analysis (Case Study in Samosir, North Sumatera)

2019 ◽  
Author(s):  
Dimas Hastama Nugraha ◽  
Crista Fialdila Suryanto
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Catchment Area ◽  
Treatment Plan ◽  
Treatment Plant ◽  
Ground Level ◽  
Quality Standard ◽  
Public Works ◽  
Secondary Process ◽  
Original Design

Lake Toba, North Sumatera is one of the national tourism areas in Indonesia that has water pollution problem due to the unsustainable development especially in the catchment area. To support Lake Toba Tourism Area and to educate the people about sustainable development, Ministry of Public Works and Housing, Republic of Indonesia built integrated tourist toilets equipped with wastewater treatment plant at Menara Pandang Tele Area, one of the most strategic tourism attraction located in the catchment area of Lake Toba. The wastewater treatment plan is not only to use biofilter but also Kolam Sanita (wetland) as secondary treatment. This study would like to see how the wastewater treatment plant at Menara Pandang Tele is designed and see what modification are made from the original design to make it well functioned. This study uses a quantitative method to calculate the volume of the wastewater treatment plant. Further calculation is also needed to determine the dimension of the technologies. The geographical character is the main aspect to be considered in this step. The results showed that to meet the quality standard of the wastewater, the biofilter technology is determined to use three processing stages starting with equalization, primary sedimentation, and secondary process which consist of anaerobic process and clarifier. The dimension modification must not be more than two meters in height. Kolam Sanita is needed to make sure the effluent quality will not harm the groundwater. The modification is required due to the various heights of the ground level and makes the design representative of aesthetic function.

scholarly journals ANALISIS EKO-EFISIENSI DAUR ULANG AIR LIMBAH DI PT. CHEMCO HARAPAN NUSANTARA

2020 ◽  
Vol 14 (2) ◽  
pp. 78-87
Author(s):  
Nisa Nurhidayanti
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Production Process ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Process Water ◽  
Clean Water ◽  
Production Processes ◽  
Wastewater Recycling

Abstrak - PT. Chemco Harapan Nusantara (PT CHN) membutuhkan air bersih dalam jumlah besar untuk digunakan sebagai air proses dalam kegiatan proses produksi. Adapun total kebutuhan air bersih untuk semua proses produksi yaitu sebanyak 10.450 m3/ bulan. PT CHN dapat menghasilkan produk yang bernilai jual dari penggunaan air bersih tersebut. Di samping itu juga menghasilkan air limbah yang dapat mencemari lingkungan. Tujuan dari penelitian ini adalah untuk menerapkan metode daur ulang air limbah pada PT CHN sehingga dapat mengurangi dampak buruk bagi lingkungan akibat pembuangan air limbah dan menghasilkan penghematan secara ekonomi terutama pada saat Pandemi Covid19 ini. Penerapan dari metode tersebut dilakukan dengan cara mengolah air limbah di dalam instalasi pengolahan air limbah, kemudian mengolah kembali air tersebut di dalam instalasi pengolahan air bersih. Air olahan yang diperoleh kemudian di distribusikan ke masing-masing proses produksi pemakai air bersih. Metode yang digunakan dalam penelitian ini adalah dengan wawancara dan survei secara langsung di lokasi kemudian menganalisis hasil penelitian dengan teknik analisa data coding, entering, cleaning, display dan analyzing. Berdasarkan hasil penelitian menunjukkan bahwa penerapan metode daur ulang air limbah mampu mengubah seluruh air limbah menjadi air bersih yang dapat digunakan untuk proses produksi , sehingga tidak mencemari lingkungan. Hal tersebut terbukti bahwa pada prosesnya seluruh air limbah dimasukkan ke dalam instalasi pengolahan air limbah yang kemudian diolah lagi di WTP dan air hasil olahan dari WTP tersebut digunakan kembali sebagai process water. Penerapan metode daur ulang air limbah yang dilakukan oleh PT CHN juga dapat menguntungkan secara ekonomi yaitu dengan dapat mengurangi pemakaian air WTP Jababeka sebesar 77,5 %, sehingga mampu menghemat biaya pengeluaran pembelian air sebesar Rp 99.187.652 /bulan. Abstract - PT. Chemco Harapan Nusantara (PT CHN) requires large amounts of clean water to be used as process water in production process activities. The total need for clean water for all production processes is 10.450 m3 / month. PT CHN can produce products of value from the use of clean water. Besides that, it also produces waste water which can pollute the environment. The purpose of this research is to apply the wastewater recycling method at PT CHN so as to reduce adverse environmental effects due to waste water disposal and generate economic savings, especially during the Covid Pandemic19. The application of this method is done by treating wastewater in a wastewater treatment plant, then reprocessing the water in a clean water treatment plant. The processed water obtained is then distributed to each of the clean water user production processes. The method used in this study is to interview and survey directly on site and then analyze the results of research with data analysis techniques coding, entering, cleaning, display and analyzing. Based on the results of the study showed that the application of the wastewater recycling method is able to convert all wastewater into clean water that can be used for the production process, so it does not pollute the environment. This is evident that in the process all wastewater is put into a wastewater treatment plant which is then treated again at the WTP and the treated water from the WTP is reused as process water. The application of the wastewater recycling method conducted by PT CHN can also be economically profitable, namely by being able to reduce the use of Jababeka's WTP water by 77,5%, thereby being able to save on the cost of water purchase expenses of Rp 99.187.652 / month.

scholarly journals Investigation of the Wastewater Treatment Plant Processes Efficiency Using Statistical Tools

2020 ◽  
Vol 12 (24) ◽  
pp. 10522
Author(s):  
Dariusz Młyński ◽  
Anna Młyńska ◽  
Krzysztof Chmielowski ◽  
Jan Pawełek
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Probability Distributions ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Gaussian Mixture ◽  
Statistical Tools ◽  
Empirical Distributions ◽  
Akaike Criterion ◽  
Anderson Darling

The paper presents modelling of wastewater treatment plant (WWTP) operation work efficiency using a two-stage method based on selected probability distributions and the Monte Carlo method. Calculations were carried out in terms of sewage susceptibility to biodegradability. Pollutant indicators in raw sewage and in sewage after mechanical treatment and biological treatment were analysed: BOD5, COD, total suspended solids (TSS), total nitrogen (TN) and total phosphorus (TP). The compatibility of theoretical and empirical distributions was assessed using the Anderson–Darling test. The best-fitted statistical distributions were selected using Akaike criterion. Performed calculations made it possible to state that out of all proposed methods, the Gaussian mixture model (GMM) for distribution proved to be the best-fitted. Obtained simulation results proved that the statistical tools used in this paper describe the changes of pollutant indicators correctly. The calculations allowed us to state that the proposed calculation method can be an effective tool for predicting the course of subsequent sewage treatment stages. Modelling results can be used to make a reliable assessment of sewage susceptibility to biodegradability expressed by the BOD5/COD, BOD5/TN and BOD5/TP ratios. New data generated this way can be helpful for the assessment of WWTP operation work and for preparing different possible scenarios for their operation.

scholarly journals Reabilitation of a wastewater treatment plant – possible environment impact

2017 ◽  
Vol 19 (1) ◽  
pp. 65-78
Author(s):  
Mădălina Stănescu ◽  
Constantin Buta ◽  
Geanina Mihai
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Wastewater Treatment Plant ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Environment Impact ◽  
Operational Phase

Abstract Romania, has declared, by the Governmental Decision nr.352/2005, all its territory as a sensitive area. This implies that, for all urban agglomerations larger than 10.000 population equivalent waste water treatment plants (WWTP) with nutrient removal must be built or upgraded. This paper presents the results regarding the possible environmental impacts expected from the project for construction of waste water treatment plant in the City of Vaslui, with main focus on surface water. This research study includes assessment methodology, project description regarding the rehabilitation and extension of the Vaslui waste water treatment plant, data related to water resources, impact assessment on water and appropriate mitigation measures. The assessment of the impacts has been performed for the construction and operational phase of the wastewater treatment plant. The construction phase was subdivided into several phases, while in the operational phase the impacts are analyzed following the line for treatment of the wastewater and effluent production, the line for sludge production and drying process, sludge disposal in safety conditions considering the provisions of 86/278/EEC Directive and the line for biogas utilization.

scholarly journals Designing and Modeling of a Municipal Wastewater Treatment Plant With GPS-X

2022 ◽  
Author(s):  
Fahim Shahriar Sakib
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Design Calculation ◽  
Preliminary Treatment ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plant ◽  
State Process

Abstract Wastewater treatment is the process used to remove contaminants from wastewater to produce an effluent suitable for discharge to the environment. Several kinds of wastewater are treated based on the concentration of various parameters. Domestic Wastewater/Municipal Wastewater is treated in Sewage Treatment Plants (STP), which involve various types of processes like physical, chemical and biological to treat the wastewater better. The treatment plant involves five steps of the process – preliminary treatment, primary treatment, secondary treatment, tertiary treatment and sludge treatment to meet the safe disposal guidelines of the department of the environment. In this paper, a municipal wastewater treatment plant for Uttara City is designed and modeled with GPS-X. GPS-X is a wastewater treatment plant modeling software package that is used for verify the treatment process. The design calculation of all unit operations is shown with a specification table. The Process Flow Diagram (PFD), Process Block Diagram (PBD) and mass balance of the process are expressed in the article. The design calculation of the STP is performed with a steady-state process. After each unit operation, the concentration of various parameters – TSS, BOD, VSS, TN is analyzed and the removal efficiency for different equipment is calculated. The STP is designed to maintain the guidelines of the Department of Environment, Bangladesh. At the end of the paper, the designing and modeling steps of a sewage treatment plant will be pursued. Finally, some recommendations are done in the conclusion section.

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