An integrated wastewater treatment and reuse concept for the Olympic Park 2008, Beijing |
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| Affiliation: | 1. Centre for Water in Urban Areas/Department of Water Quality Control, Technical University of Berlin, Sekr. KF 4, Str. des 17. Juni 135, D-10623 Berlin, Germany;2. Beijing Drainage Group Co., Ltd., Gaobeidian Sewage Treatment Plant, Beijing, P.R. China;3. Tsinghua University Beijing, Institute of Nuclear & New Energy Technology, INET, Beijing, P.R. China;1. Imdea Water, Av. Punto Com 2, 28805 Alcalá de Henares, Madrid, Spain;2. Alterra, Department of Climate Change and Adaptive Land and Water Management– CALM, Droevendaalsesteeg, 6708 PB Wageningen, The Netherlands;3. University of Rey Juan Carlos, ESCET, Department of Biology and Geology, C/Tulipán s/n, 28933 Madrid, Spain;4. University of Alcalá, Department of Geology, Geography and Environment, Ctra. A-II km 33,600 28871 Alcalá de Henares, Madrid, Spain;1. School of Chemistry and Environment, South China Normal University, Guangzhou Higher Education Mega Center, Guangzhou, 510006, China;2. Department of Transportation and Environment, Shenzhen Institute of Information Technology, Shenzhen, 518172, China;3. College of Environment, Jinan University, Guangzhou, 510632, China |
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| Abstract: | In a Sino-German research project, a joined developed sustainable water reclamation concept was developed for different applications of municipal water reuse at the Olympic Green 2008. The concept combines advanced technological processes like membrane bioreactors, specific phosphorus (P) adsorption columns and ultrafiltration (UF) with nature-based treatment processes like wetland and bank filtration mechanisms. The project’s approach is not only to comply with the reclamation requests of the Olympic Green 2008, but also to give an example for better, adapted and energy efficient reuse applications throughout China. The study shows that fixed-bed granular ferric hydroxide (GFH) adsorbers after a membrane bioreactor (MBR) can maintain a total phosphorus (TP) concentration of <0.03 mg L−1. A low P concentration will be necessary to control eutrophication in the artificial Olympic Lake filled with treated wastewater. With an adsorption capacity of approx. 20 mg g−1 d.m. at a corresponding equilibrium concentration of 1 mg L−1 P, GFH reaches long operation times and can be repeatedly regenerated by caustic solutions with an efficiency of 50%. Apart from scenic impoundments, treated wastewater will be used for irrigation and toilet flushing. The latter requires a superior quality that will be delivered by low pressure UF treatment after lake (bank) filtration. A crucial reduction of fouling potential for dead-end UF is expected. |
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