biological treatment of wastewater slideshare

Water and wastewater can be classified as The root zone waste water treatment system makes use of biological and physical-treatment processes to remove pollutants from wastewater. Fluence has decades of experience delivering sustainable water and wastewater solutions to communities large and small. 5. This book provides the numerical applications that illustrate the treatment of laboratory data. Abstract. The chapter describes the biological and chemical wastewater treatment processes that include: Bioremediation of wastewater using oxidation ponds, aeration lagoons, anaerobic lagoons, aerobic and anaerobic bioreactors, activated sludge, percolating or trickling filters, biological filters, rotating biological contactors, and biological removal … The following are the main gases of concern in wastewater treatment: N 2, O 2, CO 2, H 2 S, NH 3, CH 4 pH:-The hydrogen-ion concentration is an important parameter in both natural waters and wastewaters. What treatment is used depends on the waste-load volume and concentration. It is a very important factor in the biological and chemical wastewater treatment. This chapter reviews the current pulping technologies at mills and compares the chemical composition and biological treatment of wastewater between softwood and hardwood bleached pulps. Description. Without their As with all biologic type secondary treatment systems, wastewater soluble BOD, and suspended solids (SS) are converted to a settleable biologic sludge. – Consist of natural or artificial wetlands to which wastewater is applied Renovation is accomplished by sedimentation and biological activity by the plants and microorganisms present 28. After 20 years of research and development, this innovative biological solution is now proving to be one of the most sought–after, progressive wastewater biological treatment technologies. Textile wastewater treatment and reuse is a promising answer to conserve and augment available water resources and reduce harmful pollution discharge into the environment. Biological wastewater treatment harnesses the action of bacteria and other microorganisms to clean water. The solids that sediment are strained off, and the sludge is collected to be burned or buried in landfills. 2007a,b).Based on the microbial nitrogen cycle and the … Creating and maintaining the right environment for these organisms is the key to effective biological phosphorous removal. The secondary sludge is primarily insoluble solids such as biomass of microorganisms. An aerated lagoon (or aerated pond) is a simple wastewater treatment system consisting of a pond with artificial aeration to promote the biological oxidation of wastewaters.. The technology of industrial wastewater treatment uses both mechanical and physicochemical methods as well as biological ones. Presence of fat, oil, and grease (FOG) in wastewater is an ever-growing concern to municipalities and solid-waste facility operators. Physical Wastewater Treatment Methods. Highlights This research presents an exhaustive characterization of cheese and other dairy effluents. It is a type of waste water treatment in which microorganisms such as bacteria are used to remove pollutants from waste water through bio-chemical reaction. However, the price is determined by civil engineering specifications (type of foundation), air purification and gas treatment (gas conditioning, flare,…) automation,… a final clarifier. Aerobic digestion is a process of treating the secondary sludge from the biological wastewater treatment process, such as activated sludge and trickling filters; primary sludge is better treated by anaerobic digestion (see Chapter 4). A Focus on Anaerobic Treatment There are 2 major types of systems used for wastewater treatment: aerobic and anaerobic systems. Like you and I, they perform best when all their The wastewater generated from the processes of recovering precious metals from industrial wastes contains high concentrations of acids and alkalis such as nitric acid and aqueous ammonia, and of salts such as sodium chloride and sodium sulfate. Chapter description and contents overview. The microorganisms do the actual breakdown and removal of nutrients and organic material in the wastewater. Biological treatment is an important and integral part of any wastewater treatment plant that treats wastewater from either municipality or industry having soluble organic impurities or a mix of the two types of wastewater sources. Hypersaline wastewater (i.e., wastewater containing more than 35 g L-1 Total Dissolved Solids (TDS) generated from soak pit of the tannery industry was difficult to treat using conventional biological wastewater treatment processes. Screening is the first step at any wastewater treatment system. Filter bed - uniform rocksgravels, crushed PVC bottle ( 1-3m deep). This is especially felt in water stressed countries across Africa, Asia and Latin America were the textile industry is of vital importance to local economies. Activated sludge treatment, the most commonly used biological process, begins by adding oxygen to the system either by vigorous mixing or bubbling. Biological wastewater treatment (anaerobic and aerobic digestion reactors) takes advantage of the ability of certain microorganisms (including bacteria) to assimilate organic matter and nutrients dissolved in the water for their own growth, thus removing soluble components in the water. Latest estimates reveal (PWSS, 2002 Protecting our surface water sources from This effective technology called Decentralised Wastewater Systems (DEWATS) was developed in 1970s in Germany and has been successfully implemented in different countries mainly in Europe and America. Sixty to seventy-five per cent of all the biological effluent treatment plants within the pulp and paper industry use this kind of treatment system. 2. Attention was paid to the applicability of a particular method, its advantages and disadvantages and the costs of implementation. FOG enters the sewer system from restaurants, residences, and industrial food facilities. A biological tower is generally used as an initial treatment unit in a full treatment process and it may be used for pretreatment prior to discharging to a POTW. •With proper and adequate treatment methods a substantial amount of NH3 and PO4 removal can be achieved at a rate of 90% reduction. Alternatively, it can be treated in an anaerobic sludge‐digesting tank, as follows. If you continue browsing the site, you agree to the use of cookies on this website.

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