Pathogens diseasecausing organisms that include bacteria, amoebas and viruses, as well as the eggs and larvae of parasitic worms. Pdf sewage waste disposal and air pollution engineering. These tanks are compact which can be utilized in a decentralized manner at any location, either its underground or above the ground. Package stps are innovative and truly versatile systems for the effective treatment of. The sewage after treatment may be disposed either into a water body such as lake, stream, river, estuary, and ocean or on to land. This option is worked out on the basis of quantum of flow available to treat and suitability of the treatment on the basis of following objectives 1. Ppt of sewage treatment by shaktiraj sewage treatment. Parameter public sewers treated effluen after secondary treatment aftertertiary treatment 1 ph value 5. Pdf engineering geology books collection free download.
This course is specially designed for post graduate students of environmental. Management therefore means handling wastewat er to protect the environment to ensure. Water treatment nptel week 6 sewage treatment wastewater. Constructed wetlands treatment of municipal wastewater pdf 166 pp, 1. Background the percentage of the population served by sewage waste water treatment facilities varies considerably among the countries of the eu. Primary sludge when raw sewage is settled in a primary clarifier, the suspended solids settle down by gravity. This is the first stage of sewage treatment plant process and its main objective is the removal of coarse solids and other large materials often found in raw wastewater.
The working principle of sewage treatment plant stp. The existing topography and required minimum sewer grades create deep sewers. It is easy to operate once you have been properly trained, which they come to your plant to do. Sewage disposal and air pollution engineering volume 2 provides the reader with details on the treatment of domestic and industrial wastewater and the description of various air pollutants and the many technologies that are used in. Packaged sewage treatment plant pstp arvind envisol. Treatment uwwt directive 19918 now defines standards for sewage effluents discharging to rivers, estuaries and coastal waters. Clariflocculator shall have two concentric tanks with inner tank serving as flocculation basin and outer tank. Preliminary treatment operations typically include large filtering screens, grit removal and, in some cases, breaking of large objects. Wastewater treatment wastewater treatment oxidation pond. Harmful chemicals from human activities industrial wastes, pesticides, fertilizers. Preliminary and primary wastewater treatment processes. If the effluent, the treated wastewater produced by a treatment plant, has a high content of organic pollutants or ammonia, it will demand more. Sand, eggshells and other coarse inorganic material is present in the flow in addition to organic matter from household, industrial, commercial and institutional water use.
Bathing clothes washing kitchen vegetable washing utencil washing toilets urinals purpose quantity drinking. Pdf waste water management environmental engineering. Sewage sludge treatment page 3 of 23 overview and summary of this lesson sludge originates from the process of treatment of wastewater and is separated from the. Water treatment nptel week 6 free download as pdf file. A byproduct of sewage treatment is a semisolid waste or. The following is a set of lecture notes from the class, prepared by dr. Wastewater treatment process and preliminary treatment of wastewater this lecture explains about the wastewater treatment process overview. Wastewater laboratory basics sampling, ammonia, bod, chlorine residual, fecal coliform, ph, solids. Nptel syllabus water and waste water engineering video course water and wastewater quantity estimation.
This sludge dewatering handbook will present the key parameters to take into account in order to. Sewage treatment in the above table the screen, clarifiers, grit chamber are all physical treatment unit because in all those units the removal of impurities is taking place due to physical processes like gravity settling, mechanical straining, etc. Many existing plants are being improved or extended and will be similarly equipped. Secondary treatment the secondary stage of treatment removes about 85 percent of the organic matter in sewage by making use of the bacteria in it. Nptel civil engineering sewage treatment wastewater scribd. Primer for municipal wastewater treatment systems clean water act requirements for wastewater treatment 4. Chemical treatment adsorption and ion exchange pdf 2. Being able to operate the plant from your home or anywhere. The sludge resulting from this process represents the next challenge for the water treatment industry, in particular the minimizing of its volume.
In large waste water treatment plants, the flocculator and the clarifier are combined together to achieve economy in construction. Higher hrt may be required for treatment of industrial wastewater having higher bod concentration. The latest results average 5 mgl bod, 8 mgl tss, 0. The biological wastewater treatment series is based on the book biological wastewater treatment in warm climate regions and on a highly acclaimed set of best selling textbooks. Preliminary treatment of wastewater generally includes those processes that remove debris and coarse biodegradable material from the waste stream andor stabilize the wastewater by equalization or chemical addition. Oxidation ponds, also called lagoons or stabilization ponds, are large, shallow ponds designed to treat wastewater through the interaction of sunlight, bacteria, and algae. It may also be utilized for several purposes such as a industrial reuse or reclaimed sewage effluent cooling system, boiler feed, process water, etc. The sludge recirculation ratio is generally in the range of 0.
Plus, kevin and his staff are always readily available to ask any questions. Sewage treatment plant stp process is similar to the way that a septic tank works but mechanical components provide additional processes to help break down solids to produce a cleaner, more environmentally friendly effluent. Preliminary and primary wastewater treatment processes a. This technical note provides background information on the. Lecture notes water and wastewater treatment engineering. C temperature used is an average temperature value typically. Sewage treatment is the process of removing contaminants from municipal wastewater, containing mainly household sewage plus some industrial wastewater. This course aims to discuss the various treatment technologies and their application for producing reuse quality water from wastewater. Constructed wetlands wetlands protection and restoration. Clariflocculator water treatment waste water treatment. The removal of solids by physical screening or sedimentation the removal of soluble and fine suspended organic pollutants by biological oxidation and adsorption processes. Wastewater treatment is a process used to remove contaminants from wastewater or sewage and convert it into an effluent that can be returned to the water cycle with minimum impact on the environment, or directly reused.
Mechanical straining takes place in screens and gravity settling takes place in clarifiers. The principal secondary treatment techniques used in secondary treatment are the trickling filter and the activated sludge process. The combined unit of flocculator and clarifier is known as clariflocculator in waste water treatment process. Domestic sewage treatment septic tank and soak pit. Chapter 4 anaerobic sewage treatment using uasb reactors.
Ppt of sewage treatment by shaktiraj free download as powerpoint presentation. Civil engineering water and waste water engineering nptel. The treatment process takes place in a wastewater treatment plant wwtp. Nptel provides elearning through online web and video courses various streams. Wastewater management web course civil engineering nptel. Download sewage waste disposal and air pollution engineering by santosh kumar garg environmental engineering vol. We have adopted the most modern treatment of sequential batch reactor sbr process. Tm 58148 the grit removal system ahead of the raw sewage pumps because of the depth of the influent line. The differences among thirteen member countries of the organisation for economic cooperation and development oecd are illustrated in figure 2. Treatment plant raw sewage inflow river discharge treated sewage outfall fig. This international version is comprised by six textbooks giving a stateoftheart presentation of the science and technology of biological wastewater treatment. Municipal wastewater collection and treatment philosophy. Provides information on technologies, advantages and disadvantages, design criteria, operation and maintenance, and costs. Package sewage treatment plant process description.
Working process of a sewage treatment plant stp below is a typical view of a sewage treatment plant stp showing all the equipment in the equipment. The latter is called water reclamation because treated wastewater can be used for other purposes. Secondary treatment information, 40 cfr, part 3,federal register, monday, 30 april 1973. This document is not intended to be guidance or a support document for a specific regulatory program. A septic tank is a key component of the septic system or sewer system. Pdf a performance indicators system for urban wastewater. In rural areas where houses are spaced so far apart that a sewer system would be too expensive to install, people install their own, private sewage treatment plants. Algae grow using energy from the sun and carbon dioxide and inorganic compounds released by bacteria in water. Today, the treatment of water is a wellknown process and is executed by state of the art techniques. Wastewater technology fact sheet inplant pump stations description the terrain of the treatment plant site and the influent sanitary sewer depth govern the need for and location of inplant pumping facilities. Septic tank and soak pit domestic sewage treatment systems. Nptel civil engineering water and waste water engineering free download as pdf file. Lecture notes water and wastewater treatment engineering civil.
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