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- Biological Wastewater Treatment Systems: Theory and Operation
- Biological wastewater treatment and bioreactor design: a review
- Wastewater treatment
- Design of control strategies for nutrient removal in a biological wastewater treatment process
Biological Wastewater Treatment Systems: Theory and Operation
Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Horan Published Environmental Science. Wastewater characteristics and the effects of its discharge on receiving waters conventional wastewater treatment processes process fundamentals microorganisms exploited in wastewater treatment microbial energy generation the kinetics of bacterial growth modelling and design of biological reactors nutrient removal from wastewaters operation and control of conventional systems waste stabilization ponds and aerated lagoons. Save to Library. Create Alert.
Biological wastewater treatment and bioreactor design: a review
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 acceptable impact on the environment, or reused for various purposes called water reclamation. Pollutants in wastewater are removed, converted or broken down during the treatment process. The treatment of wastewater is part of the overarching field of sanitation. Sanitation also includes the management of human waste and solid waste as well as stormwater drainage management. The processes involved in waste-water treatment include physical processes such as settlement or flotation and biological processes such as aerated lagoons , activated sludge , or bio-films in trickling filters. Other physical methods such as filtration through sieves may be used in specialised circumstances such as de-watering waste-water sludge. To be effective, sewage must be conveyed to a treatment plant by appropriate pipes and infrastructure , and the process itself must be subject to regulation and controls.
Since the implementation of the Clean Water Act and subsequent creation of the United States Environmental Protection Agency USEPA in the early s, industrial, institutional and commercial entities have been required to continually improve the quality of their process wastewater effluent discharges. At the same time, population and production increases have increased water use, creating a corresponding rise in wastewater quantity. This increased water use and process wastewater generation requires more efficient removal of by-products and pollutants that allows for effluent discharge within established environmental regulatory limits. The determination of wastewater quality set forth in environmental permits has been established since the s in a series of laboratory tests focused on four major categories:.
Design of control strategies for nutrient removal in a biological wastewater treatment process
Biological wastewater treatment — which relies on microorganisms to break down organic waste — has a long history, and ranges from simple cesspits to conventional activated sludge plants all the way to technologically advanced solutions like MABR. Biological treatments rely on bacteria, nematodes, or other small organisms to break down organic wastes using normal cellular processes. Wastewater typically contains a buffet of organic matter, such as garbage, wastes, and partially digested foods. It also may contain pathogenic organisms, heavy metals, and toxins.
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Wastewater treatment plants WWTP are highly non-linear operations concerned with huge disturbances in flow rate and concentration of pollutants with uncertainties in the composition of influent wastewater. In this work, the activated sludge process model with seven reactor configuration in the ASM3bioP framework is used to achieve simultaneous removal of nitrogen and phosphorus. A total of 8 control approaches are designed and implemented in the advanced simulation framework for assessment of the performance.
Metrics details. Utilization of membrane-based technology and liquid phase oxygen technology in wastewater treatment has also been analyzed. Both aerobic and anaerobic processes have been considered and possibilities of clubbing waste treatment with waste utilization production of valuable products from waste streams have also been surveyed and scrutinized. Biological wastewater treatment is a biochemical process that is centuries old. Even today, as the quantity of industrial effluents discharged is on the increase and the types of pollutants present in the effluent streams are getting diversified, wastewater treatment processes are being investigated and experimented exorbitantly all over the globe.
The scope of this comprehensive new edition of Handbook of Biological Wastewater Treatment ranges from the design of the activated sludge system, final settlers, auxiliary units sludge thickeners and digesters to pre-treatment units such as primary settlers and UASB reactors. The core of the book deals with the optimized design of biological and chemical nutrient removal. The book presents the state-of-the-art theory concerning the various aspects of the activated sludge system and develops procedures for optimized cost-based design and operation. It offers a truly integrated cost-based design method that can be easily implemented in spreadsheets and adapted to the particular needs of the user. Handbook of Biological Wastewater Treatment: Second Edition incorporates valuable new material that improves the instructive qualities of the first edition.
This chapter elucidates the technologies of biological and chemical wastewater treatment processes. The presented biological wastewater treatment processes include: 1 bioremediation of wastewater that includes aerobic treatment oxidation ponds, aeration lagoons, aerobic bioreactors, activated sludge, percolating or trickling filters, biological filters, rotating biological contactors, biological removal of nutrients and anaerobic treatment anaerobic bioreactors, anaerobic lagoons ; 2 phytoremediation of wastewater that includes constructed wetlands, rhizofiltration, rhizodegradation, phytodegradation, phytoaccumulation, phytotransformation, and hyperaccumulators; and 3 mycoremediation of wastewater. Additionally, this chapter elucidates and illustrates the wastewater treatment plants in terms of plant sizing, plant layout, plant design, and plant location. Wastewater Treatment Engineering. The chapter concerns with wastewater treatment engineering, with focus on the biological and chemical treatment processes.
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