A business park in Europe contained between 3000 and 6400 employees, producing unequal loading and varying nitrate concentration in the wastewater. Nitrate treatment was required as the effluent from the plant was discharged into a stream which had strict discharge requirements of 5ppm for nitrates. The plant had an average flowrate of 377 m3/day and produced an effluent which consistently meets the 5ppm discharge requirement.