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WATER MANAGEMENT


Table 2 – Hospitals mapped as major point sources in the capital region of Copenhagen. Hospital


No. of Catchment beds area


A: Highly hazardous


New Northern Zealand 670 Small/fresh 130 Hvidovre


New Bispebjerg Rigshospitalet New Herlev


pharmaceuticals [kg/yr] [kg/yr]


800 Large/marine 111 860 Large/marine 108 7 1100 Large/marine 436 950 Large/marine 181


989 818 08


1381 700


B: Hazardous Sum of


Antibiotics


pharmaceuticals exceedance contribution of limit values (excluding [MC/GLV]*


25


penicillins) [%] 79 27


48 and 172 8 105 104


*Ratio between measured concentration and guiding limit value as set by Danish authorities


pharmaceuticals, hydrogen sulphide, heavy metals (lead, mercury and copper), chlorine and organic compounds from water by either adsorption or catalytic reduction; a process involving the attraction of negatively charged contaminant ions to the positively charged activated carbon. Organic compounds are removed by adsorption and residual disinfectants such as chlorine and chloramines are removed by catalytic reduction. When the GAC has used their full adsorption capacity, the GAC is sent for re-generation in Germany so they can be re-used again and again. Finally, UV is installed as an extra barrier against bacteria. UV works by a process of photoionisation and destroys bacteria and other germs as well as removing odours. The whole process takes place in a


Table 3 – plant capacity and loads Parameter


Max capacity


Average flow, workdays Average flow, weekends Annual average flow Annual volume


Unit m3 m3 m3 m3 m3


The waste water treatment plant is the largest and first installation in the world to test and demonstrate a complete solution to on-site waste water treatment specifically targeted to remove the unique pollutants generated in hospitals


closed system, and odour critical points like storage bins for screenings and sludge etc. are underpressurised, and all air emissions are treated with photoionisation in order to ensure an odour and pathogen free environment in and outside the plant. Sludge, including any remaining pathogens, is dried on site and then


/day /day /day /day


2016 loadings 648 426 293 390


142.454


transported for incineration at the nearby incineration plant. Only between 1-3 m3 bio sludge are produced weekly.


of


Proven treatment results During the test period, water experts DHI has monitored and tested the treated water for the presence of around 90 different substances more than 100 times. The analysis of pharmaceuticals in the waste water was performed by the Institute of Energy and Environmental Technology in Duisburg, Germany and Eurofins, Denmark. Tests for toxicity and genotoxicity were carried out by the Research Institute for Ecosystem Analysis and Assessment in Aachen, Germany. Among the tested parameters are APIs, toxicity, bacteria (drug resistant bacteria), viruses, volatile substances, xenobiotics and radioactive substances. The project demonstrated that the


hazardous substances could be removed and that the quality of the treated water is very close to drinking quality (see Table 1).


Competitive cost Around ¤4.5 million has been spent on building the plant. The investment is depreciated over 30 years, during which an expected 4.5 million cubic metres of waste water will be treated, which equals approximately ¤1/m3


. Operational and


maintenance costs for running the plant is roughly ¤2/m3


Different water qualities at Herlev Hospital plant. Raw sewage


IFHE DIGEST 2020


Permeate after the MB


Final outlet after the polishing stage


hospital for having their own waste water treatment plant is around ¤3/m3 the hospital is being charged ¤3.4/m3


of


waste water discharged to the public sewage system.


21


. So, in total, the cost for the . Today,


28 18


Classification as point source


Major source Major source Major source Major source Major source


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