MBR technology: a promising approach for the (pre-)treatment of hospital wastewater.

Membrane bioreactor (MBR) technology is a very reliable and extensively tested solution for biological wastewater treatment. Nowadays, separate treatment of highly polluted wastewater streams especially from hospitals and other health care facilities is currently under investigation worldwide. In this context, the MBR technology will play a decisive role because an effluent widely cleaned up from solids and nutrients is absolutely mandatory for a subsequent further elimination of organic trace pollutants. Taking hospital wastewater as an example, the aim of this study was to investigate to what extent MBR technology is an adequate 'pre-treatment' solution for further elimination of trace pollutants. Therefore, we investigated - within a 2-year period - the performance of a full-scale hospital wastewater treatment plant (WWTP) equipped with a MBR by referring to conventional chemical and microbiological standard parameters. Furthermore, we measured the energy consumption and tested different operating conditions. According to our findings the MBR treatment of the hospital wastewater was highly efficient in terms of the removal of solids and nutrients. Finally, we did not observe any major adverse effects on the operation and performance of the MBR system which potentially could derive from the composition of the hospital wastewater. In total, the present study proved that MBR technology is a very efficient and reliable treatment approach for the treatment of highly polluted wastewater from hospitals and can be recommended as a suitable pre-treatment solution for further trace pollutant removal.

[1]  M. Crane,et al.  Chronic aquatic environmental risks from exposure to human pharmaceuticals. , 2006, The Science of the total environment.

[2]  B. Lesjean,et al.  Survey of the European MBR market: trends and perspectives , 2008 .

[3]  D. Jenkins.  Towards a Comprehensive Model of Activated Sludge Bulking and Foaming , 1992 .

[4]  J. Pinnekamp,et al.  Treatment of hospital wastewater effluent by nanofiltration and reverse osmosis. , 2010, Water science and technology : a journal of the International Association on Water Pollution Research.

[5]  Zhiguo Yuan,et al.  Differential distribution of ammonia- and nitrite-oxidising bacteria in flocs and granules from a nitrifying/denitrifying sequencing batch reactor , 2006 .

[6]  B Björlenius,et al.  Removal of viruses, parasitic protozoa and microbial indicators in conventional and membrane processes in a wastewater pilot plant. , 2006, Water research.

[7]  T. Heberer.  Occurrence, fate, and removal of pharmaceutical residues in the aquatic environment: a review of recent research data. , 2002, Toxicology letters.

[8]  Joaquim Comas,et al.  Removal of microbial indicators from municipal wastewater by a membrane bioreactor (MBR). , 2011, Bioresource technology.

[9]  Karin Treyer,et al.  Environmental toxicology and risk assessment of pharmaceuticals from hospital wastewater. , 2011, Water research.

[10]  K Kümmerer,et al.  AOX-emissions from hospitals into municipal waste water. , 1998, Chemosphere.

[11]  Tatsuki Ueda,et al.  Fate of indigenous bacteriophage in a membrane bioreactor , 2000 .

[12]  J Pinnekamp,et al.  Full scale membrane bioreactor treatment of hospital wastewater as forerunner for hot-spot wastewater treatment solutions in high density urban areas. , 2011, Water science and technology : a journal of the International Association on Water Pollution Research.

[13]  Y. Perrodin,et al.  Daily physicochemical, microbiological and ecotoxicological fluctuations of a hospital effluent according to technical and care activities. , 2008, The Science of the total environment.

[14]  M. Elimelech,et al.  Evaluation of Removal of Noroviruses during Wastewater Treatment, Using Real-Time Reverse Transcription-PCR: Different Behaviors of Genogroups I and II , 2007, Applied and Environmental Microbiology.