基于水能利用的常州再生水综合利用策略研究

再生水的水资源和水能源价值是实现城市清洁能源高效利用和可续续发展的可行途径之一。以常州市新龙国际商务区为研究区域,分析其邻近污水厂的再生水可利用量,2020年达7. 5×10~4m^3/d,2025年达22. 5×10~4m^3/d,基本满足再生水能源站的需水量要求。对再生水回用于城市杂用、工业用水等途径的水质标准对比分析结果表明,除城市杂用与景观环境用水的粪大肠菌群数超标外,其余基本控制项满足要求。从水能利用可行性分析,再生水能源站的冷热负荷,2020年达26 MW/14 MW,2025年达93 MW/50 MW,基本可实现210×10~4m^2建筑面积的供冷供热需求。水能、水质、水量三方面的综合评价,一水多用、水能一体的综合利用策略,可以实现再生水的热能利用和资源化利用的双重目的。

Study on Comprehensive Utilization Strategy of Reclaimed Water Based on Water Energy Utilization in Changzhou

The value of water resources and water energy in reclaimed water is one of the feasible ways to realize the efficient utilization of clean energy and sustainable development in cities. Taking Xinlong International Business District of Changzhou as the research area, the reclaimed water availability of wastewater treatment plant which was adjacent to the research area was analyzed. It will reach 75000 m^3/d in 2020 and 225000 m^3/d in 2025 , the availability of reclaimed water basically meets the needs of the reclaimed water energy station. According to contrast analysis of wastewater reclamation and reuse standard with quality of effluent of WWTP, the results showed that the basic control items could meet demand, except for the number of fecal coliform bacteria in urban miscellaneous water and landscape water. According to the feasibility analysis of water energy utilization, the cooling and heat load of reclaimed water energy station can reach 26 MW/14 MW in 2020 and 93 MW/50 MW in 2025, which can basically meet the heating and cooling demand of 2. 1 million square meters. The results of comprehensive evaluation and analysis of water energy, water quality and water quantity showed that the strategy of comprehensive utilization of multiple use of water and integration of water resources and water energy can realize the dual purpose of heat energy utilization and resource utilization of reclaimed water.