biological sewage treatment Articles

  • An alternative to biological treatment for sewage

    Most sea-side towns discharge sewage into the sea, normally some distance off-shore, via an extended out-fall sewer. A town of 100,000 population will produce more than 14,000 cubic metres (3,000,000 gallons) of sewage every day of the year. No small problem. In some coastal locations the sewage used to receive only basic, simple treatment, usually  "screening" to remove any large ...


    By IWA Publishing

  • Sewage treatment plant

    BONO ARTES has developed an activated sludge process called BIOCLAR, which is a great technological step forwards compared to conventional methods. A large part of civil and industrial installations, especially in developing countries, is located in remote and secluded areas where there is no possibility for connection to a public sewer. On the other hand, the minimisation of the impact on the ...

  • Enhanced physicochemical-biological sewage treatment process in cold regions

    Biological treatment processes give relatively poor pollutant removal efficiencies in cold regions because microbial activity is inhibited at low temperatures. We developed an enhanced physicochemical-biological wastewater treatment process that involves micro-membrane filtration, anaerobic biofilter, and aerobic biofilter to improve the pollutant removal efficiencies that can be achieved under ...


    By IWA Publishing

  • The biological basis of wastewater treatment

    Introduction This booklet was written to fulfil the need for a simple explanation of the biological processes that underpin wastewater treatment. It attempts to show how the bacteria involved deal with the organic carbon in the sewage. Remarkably, there are just 3 major processes involved, and these mirror exactly the 3 major processes at work in the plant viz: biodegradation, oxygen ...

  • What is biological wastewater treatment?

    Biological wastewater treatment harnesses the action of bacteria and other microorganisms to clean water Biological wastewater treatment is a process that seems simple on the surface since it uses natural processes to help with the decomposition of organic substances, but in fact, it’s a complex, not completely understood process at the intersection of biology and ...


    By Fluence Corporation

  • Ozonation of estrogenic chemicals in biologically treated sewage

    The present study shows that ozonation of effluents from municipal wastewater treatment plants (WWTPs) is likely to be a future treatment solution to remove estrogens and xeno-estrogens. The required ozone dose and electrical energy for producing the ozone were determined in two WWTP effluents for removal of 17 estrogenic chemicals. The estrogenic compounds included parabens, industrial phenols, ...


    By IWA Publishing

  • Treatment of municipal sewage by Biological Aerated Filter (BAF) using burned clay pellet as media

    The high-strength municipal sewage was treated by the two-stage Biological Aerated Filter (BAF) pilot system with microorganism carrier of burned clay pellet. The effects of hydraulic loading rate, aeration ratio, overloading, backwashing and the height of media on the performance of BAF were investigated. In higher hydraulic loading and lower ratio of aeration, the two-stage BAF may decrease ...


    By Inderscience Publishers

  • Design principles to achieve a robust sewage treatment process using rotating biological contactors and reed beds

    Severn Trent Water Ltd. has chosen to adopt rotating biological contactors (RBCs) and reed beds amongst other technologies for treating sewage where the population is less than 2000. The design of an RBC to achieve a fully compliant effluent can be difficult when flows are small or the system is combined and an overflow is not permissible. In addition, RBCs have been plagued by mechanical ...


    By Inderscience Publishers

  • Toluene in sewage and sludge in wastewater treatment plants

    Toluene is a compound that often occurs in municipal wastewater ranging from detectable levels up to 237 μg/L. Before the year 2000, the presence of the aromatic hydrocarbons was assigned only to external sources. The Enhanced Biological Nutrients Removal Processes (EBNRP) work according to many different schemes and technologies. For high-efficiency biological denitrification and ...


    By IWA Publishing

  • Dogs put trust in onsite sewage treatment

    One of the obvious challenges of running Dogs Trust rehoming centres is the need to dispose of a significant quantity of hazardous waste. All locations not connected to mains drainage have to be served by reliable on site treatment systems and on completion of the latest installation at Salisbury a total of five WPL systems will be in operation around the UK. The charity cares for some 16,000 ...


    By WPL Ltd

  • Acetic acid recovery from a hybrid biological–hydrothermal treatment process of sewage sludge – a pilot plant study

    A two-stage process consisting of anaerobic fermentation followed by sub-critical wet oxidation was used to generate acetic acid from sewage sludge at pilot scale. Volatile fatty acids, dominated by propionic acid, were produced over 4–6 days in the 2,000 L fermentation reactor, which also achieved 31% solids reduction. Approximately 96% of the carbon was retained in ...


    By IWA Publishing

  • E.On on-site sewage treatment plant (Ratcliffe-on-Soar)

    Located in Nottinghamshire, E.On's Ratcliffe-on-Soar facility is one of the most efficient coal fired power stations in the UK. With a total generation capacity of 2,000MW it produces enough electricity to meet the needs of approximately 2 million people. In March 2008 WPL were contacted by E.On to enquire about a replacement sewage treatment solution to serve personnel located at the site's ...


    By WPL Ltd

  • Behavior and fate of anthropogenic substances at a Swedish sewage treatment plant

    The behavior and fate of anthropogenic substances during sewage treatment were investigated at a sewage treatment plant (STP) in Sweden which uses mechanical, chemical, and biological methods for sewage treatment and anaerobic digestion of sludge. Influent and effluent water, and sludge from two specific treatment sites were sampled. Mass balances were calculated from measured concentrations of ...


    By IWA Publishing

  • Image analysis of sludge aggregates obtained at preliminary treatment of sewage

    The results of wastewater treatment by Al and Fe salts and by electrocoagulation with aluminum electrodes are discussed and interpreted. Those processes used alone or combined with biological treatment, were analyzed for 50 and 90% removal of phosphates. Scanning electron microscopy (SEM) of the resulting sludge from three coagulation processes defined the perimeter P and area ...


    By IWA Publishing

  • Sewage Treatment - Klargester is the market leader for small and medium-sized domestic treatment plant and waste water treatment systems in the UK

    Sewage treatment plant operate by providing an environment in which aerobic bacteria are cultured. These bacteria survive by using biological matter in the sewage as a food source. To provide optimum treatment the bacteria need free access to oxygen and immersion in the sewage effluent. The majority of package plant work by providing a fixed medium that the bacteria adhere to, and a means of ...


    By Kingspan Water & Energy

  • WPL’s easy to install diamond sewage treatment plant case study

    If you are lucky enough to be involved with a building project in the beautiful countryside of Great Britain, one thing you will find most properties have in common here is that they are likely to be off-mains drainage. When involved with an off-mains building project, it is important that you do know where your wastewater goes and what happens to it, usually by means of a domestic sewage ...


    By WPL Ltd

  • E.On on-site sewage treatment plant (Ratcliffe-on-Soar) case study

    Located in Nottinghamshire, E.On's Ratcliffe-on-Soar facility is one of the most efficient coal fired power stations in the UK. With a total generation capacity of 2,000MW it produces enough electricity to meet the needs of approximately 2 million people. In March 2008 WPL were contacted by E.On to enquire about a replacement sewage treatment ...


    By WPL Ltd

  • Occurrence and elimination of antibiotics in three sewage treatment plants with different treatment technologies in Urumqi and Shihezi, Xinjiang

    Fourteen antibiotics, including five quinolones (QNs), five sulfonamides (SAs), and four tetracyclines (TCs), were selected to investigate their occurrence and elimination in three sewage treatment plants (STPs) by employing different treatment technologies in Urumqi (two STPs) and Shihezi (one STP), China. The STP in Shihezi was chosen as representative to investigate the distribution of ...


    By IWA Publishing

  • Digester gas - countess wear sewage treatment works - case study

    South West Water leads the way with highly efficient biogas combined heat and power Technology, utilising otherwise harmful digester gas. South West Water (SWW) provides clean water and sewerage services to over 1.6 million people, 365 days a year. Dedicated to environment and conservation issues, SWW is committed to using energy efficient Combined Heat and Power (CHP) generation systems. SWW has ...


    By ENER-G

  • Anaerobic sewage treatment technology in Latin America: a selection of 20 years of experiences

    From the early introduction of Anaerobic Sewage Treatment, AST, technology to Latin America 20 years ago to now, the technology has become a viable alternative to provide affordable sanitation to the region. The engineering community has learned to identify and manage the main risks factors of the technology, namely: odor emissions, material corrosion, scum removal and low treatment performance ...

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