摘要
"碳中和"运行是污水处理技术今后发展的必然。剩余污泥固然可以作为污水处理运行能耗自给自足的重要来源,但是剩余污泥的多寡又取决于进水中有机物的含量。在有机物浓度普遍偏低的我国市政污水处理厂,单靠剩余污泥转化能源显然难以满足全部运行能耗。本研究测算表明,利用污水处理厂出水作为水源热泵制冷、制热,或通过在主要处理单元上设置光伏发电组件可以产生非常可观的热量或电能。水源热泵只需使用不到15%的处理水量便可以满足至少50%以上的运行能耗,完全可以弥补因剩余污泥转化能源不足而形成的能源赤字。相形之下,光伏发电可获得的能量则显得有些"微不足道",仅能满足约10%的运行能耗。这表明,我国市政污水处理厂通过剩余污泥转化能源和污水源热泵方式一般就可以满足"碳中和"的运行目标。
Operation towards carbon neutral will be a definite goal in developing wastewater treatment technologies. Although excess sludge can be utilized as a major autarkic energy for wastewater treatment plants （WWTPs） , the amount of energy contained in sludge is decided by the content of organics （COD） in influents to WWTPs. In most of Chinese municipal WWTPs characterized by low COD influents, it is obviously impossible to operate WWTPs on the basis of energy converted from sludge. The calculation results showed that considerable energy could be recovered either by applying the effluent to water source heat pump （WSHP） or by installing photovoltaic components （PVC） on main treatment units. Applying 15% of the effluent from a studied WWTP, at least 50% of the energy consumption from this plant could be recovered by WSHP, which is completely possible to offset the energy deficit due to insufficient energy converted from excess sludge. Comparably, the energy recovered by PVC is insignificant and just accounts for 10% of the energy consumption of the plant. The study demonstrated that Chinese WWTPs could achieve their operations towards carbon neutral in combination of energy sources converted from excess sludge and also by WSHP.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第20期1-6,共6页
China Water & Wastewater
基金
"十二五"国家科技支撑计划(2012BAJ14B03)
关键词
污水处理运行
碳中和
水源热泵
光伏发电
能量平衡
碳减排
wastewater treatment operation
carbon neutral
water source heat pump
photovohaic power generation
energy balance
carbon emission reduction
