donkeytime.orgical Wastewater donkeytime.org | Sewage Treatment | WastewaterThis 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.
Aerobic Digestion and Anaerobic Digestion
ii.Biological Wastewater Treatment.pdf
Wastewater treatment 3. Irrigation with wastewater is both disposal and utilization and indeed is an effective form of wastewater disposal as in slow-rate land treatment. However, some degree of treatment must normally be provided to raw municipal wastewater before it can be used for agricultural or landscape irrigation or for aquaculture. The quality of treated effluent used in agriculture has a great influence on the operation and performance of the wastewater-soil-plant or aquaculture system. In the case of irrigation, the required quality of effluent will depend on the crop or crops to be irrigated, the soil conditions and the system of effluent distribution adopted. Through crop restriction and selection of irrigation systems which minimize health risk, the degree of pre-application wastewater treatment can be reduced. A similar approach is not feasible in aquaculture systems and more reliance will have to be placed on control through wastewater treatment.
The complex question of which contaminants in wastewater must be removed to protect the environment and to what extent must be answered specifically for each case. This requires analyses of local conditions and needs, together with the application of scientific knowledge, engineering judgement based on past experience, and consideration of federal, state and local requirements and regulations. Some important contaminants pollutants of concern in wastewater treatment are given in the Table 1. Finally, some characteristics of water and wastewater need adjustment. If discharged untreated to the environment, their biological stabilization can lead to the depletion of natural oxygen resources and to the development of septic conditions; Pathogens Communicable diseases can be transmitted by the pathogenic organisms in wastewater; Nutrients Both nitrogen and phosphorus, along with carbon, are essential nutrients for growth.