Among biological treatment processes,treatment in ponds, activated sludge plants and anaerobic treatment are commonly employed for dairy wastewater treatment . In contrast the contrary, high energy requirements of aerobic treatment plants is a significant drawback of these processes. COD concentrations of dairy effluents vary significantly; moreover, dairy effluents are warm and strong, enabling them ideal for anaerobic treatment . Furthermore, no requirement for aeration,low amount of excess sludge production and low area demand are additional advantages of anaerobic treatment processes, in comparison to aerobic processes. The aim of this paper is to summarize the recent research efforts and case studies in anaerobic treatment of dairy waste effluents. In the paper, the general characteristics of dairy waste
streams are identified and the anaerobic degradation mechanisms of the main constituents of dairy wastewaters, namely carbohydrates, proteins and lipids, are explained. Anaerobic treatment practices of dairy wastewaters, as bench, pilot and full-scale efforts, are subsequently introduced overall in detail. Combined (anaerobic–aerobic) treatment systems for dairy wastewaters are also summarized briefly. Finally, areas where particular research and more attention required in the near future are identified.
Among biological treatment processes,treatment in ponds, activated sludge plants and anaerobic treatment are commonly employed for dairy wastewater treatment . In contrast the contrary, high energy requirements of aerobic treatment plants is a significant drawback of these processes. COD concentrations of dairy effluents vary significantly; moreover, dairy effluents are warm and strong, enabling them ideal for anaerobic treatment . Furthermore, no requirement for aeration,low amount of excess sludge production and low area demand are additional advantages of anaerobic treatment processes, in comparison to aerobic processes. The aim of this paper is to summarize the recent research efforts and case studies in anaerobic treatment of dairy waste effluents. In the paper, the general characteristics of dairy waste
streams are identified and the anaerobic degradation mechanisms of the main constituents of dairy wastewaters, namely carbohydrates, proteins and lipids, are explained. Anaerobic treatment practices of dairy wastewaters, as bench, pilot and full-scale efforts, are subsequently introduced overall in detail. Combined (anaerobic–aerobic) treatment systems for dairy wastewaters are also summarized briefly. Finally, areas where particular research and more attention required in the near future are identified.
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