摘要
传统污水处理以能消能,不可持续。事实上,污水中有机物含有大量能量。若能将这部分能量回收而非去除,则可能反哺污水处理厂的运行能耗,继而减少CO2间接排放,甚至逼近"碳中和"目标。以物料平衡为基础,将水质与能量指标进行耦合,构建了能量平衡模型与分析函数,用以评价污水处理厂能量消耗与回收之间的平衡情况,继而探知污水处理厂实现"碳中和"的潜力。经实例污水处理厂实测数据验证分析,本研究所构建模型准确而实用。模型分析表明,我国污水处理厂因较低的进水有机物负荷,实施能量(CH4)回收后虽不易达到"碳中和"目标,但是能量回收完全可以弥补一半以上的能量消耗,并使CO2间接排放量至少减少50%。
Traditional wastewater treatment consumes energy with energy, which is unsustainable. In fact, organics in wastewater contain a huge amount of energy. If organic energy could be recovered in- stead of being removed, it would compensate consumed energy in WWTPs, reduce indirect CO2 emis- sion, and even approach to ＂carbon neutral＂. Based on mass balance, influent quality and energy index were coupled, and energy balance models and analyzing functions were configured, which were applied to evaluate the balance between energy consumption and recovery and to further ascertain the potential of ＂carbon neutral＂. Validated and analyzed on the basis of a practical set of data from a practical WWTP, the configured models were demonstrated to be accurate and practical. It was revealed by the model ana- lyses that WWTPs in China were not so easy to approach to ＂carbon neutral＂ under the circumstance of energy recovery （CH4 ） due to low influent organic load. But energy recovery could compensate half of consumed energy and thus reduce indirect CO2 emission by at least 50%.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第2期1-7,共7页
China Water & Wastewater
基金
国家自然科学基金资助项目(51278025)
关键词
污水处理
碳中和
能量平衡
能量回收
物料平衡
A2
0工艺
wastewater treatment
carbon neutral
energy balance
energy recovery
massbalance
A2/O process
