Nowak O
Institute for Water Quality and Waste Management, Vienna University of Technology, Karlsplatz 13, A-1040 Wien, Austria.
Water Sci Technol. 2003;47(12):125-32.
The energy demand of municipal wastewater treatment plants for nutrient removal equipped with primary clarifiers, activated sludge system, anaerobic sludge digestion, and CHP is evaluated theoretically, on the basis of COD balances. Operational experience from energy-efficient Austrian treatment plants confirms that the demand on external electrical energy can be kept as low as 5 to 10 kWh/(pe.a) depending on the N:COD ratio in the raw wastewater. A low N:COD ratio helps to keep not only the effluent nitrogen load low, but also the energy demand. Measures to minimise the energy demand at treatment plants and to reduce the nitrogen load are discussed.
基于化学需氧量（COD）平衡理论评估了配备初沉池、活性污泥系统、厌氧污泥消化和热电联产的城市污水处理厂的养分去除能源需求。来自奥地利节能污水处理厂的运行经验证实，根据原废水中氮与化学需氧量的比例，外部电能需求可低至5至10千瓦时/（人·年）。低氮与化学需氧量比例不仅有助于降低出水氮负荷，还能降低能源需求。讨论了污水处理厂降低能源需求和减少氮负荷的措施。
