Lu Weizhen, Leung Andrew Y T
Department of Building and Construction, City University of Hong Kong, Kowloon, Hong Kong HKSAR, PR China.
Chemosphere. 2003 Sep;52(9):1451-9. doi: 10.1016/S0045-6535(03)00482-X.
With the ever-increasing urban population and economic activities, water usage and demand are continuously increasing. Hence, finding/re-creating adequate water supply and fully utilizing wastewater become important issues in sustainable urban development and environmental benign aspect. Considering Hong Kong's situation, e.g., lack of natural fresh water, domination of municipal wastewater, etc., developing wastewater reclamation and reuse system is of specific significance to exploit new water resource and save natural fresh water supplied from Mainland China. We propose and have carried out some preliminary studies on the potential of categorizing municipal wastewater, developing grey and storm water recycling system in public housing estate, investigating the feasibility and potential of using reclaimed grey water, etc. Since there is very limited experience in grey water recycling, such initial studies can help to understand and increase knowledge in utilizing grey water, to foresee the feasibility of developing new water resource, to estimate the cost-effectiveness of reclaiming grey water in metropolitan city.
随着城市人口和经济活动的不断增加，用水量和需求持续上升。因此，寻找/重建充足的供水并充分利用废水，成为可持续城市发展和环境友好方面的重要问题。考虑到香港的情况，例如缺乏天然淡水、城市废水占主导等，开发废水回收和再利用系统对于开发新的水资源和节约从中国内地供应的天然淡水具有特殊意义。我们提出并开展了一些初步研究，内容包括对城市废水进行分类的潜力、在公共屋邨开发灰水和雨水循环系统、调查使用再生灰水的可行性和潜力等。由于灰水回收的经验非常有限，这些初步研究有助于了解和增加利用灰水的知识，预见开发新水资源的可行性，估算在大都市回收灰水的成本效益。
