Treatment of hospital waste water by ozone technology

Conventional treatment hospital wastewater need high cost, large area, long time and the final result leaves a new waste known as sludge. Alternative to more efficient and new technologies for treated hospital wastewaters was ozonation. Ozonation is able to oxidized pollutant materials in wastewater. This research is to know the decrease of COD and TDS levels with ozone. Waste water samples used by dr. Adhyatma, MPH Hospitals Semarang. Kruskal-Wallis test for COD and TDS with variation of concentration p-value = 0,029 and 0,001 (p≤0,05) or there is significantly difference between COD and TDS with level of concentration but there were no different between levels of COD, and TDS with reactions time variations p-value = 0,735, and 0,870 (p≥0.05). Ozone efficiently reduction of COD and TDS at a concentration of 100 mg/liter, the lowest mean value at COD 17.47 mg/liter and TDS 409.75 mg/liter. (paper)