State General Laboratory Annual Report 2018

38 State General laboratory Annual Report 2018 Effluents Domestic effluents - treated water Water scarcity and increased needs due to population growth as well as lifestyle and climate changes make the safe reuse of recycled water from liquid municipal waste extremely important for the water balance of Cyprus. An important prerequisite for the use of recycled water is strict quality control to ensure the protection of hu- man health and the environment from possible effects of the long-term use as well as to address the concerns and bias of citizens towards the use of recycled water. The quality control of recycled water includes both chemical and toxicity control:  Chemical control (pH, conductivity, residual Chlorine, BOD5, COD, Suspended Colids, Chlorides, Nitrates, Sulphates, Boron, total Phosphorus, Kjeldahl-Nitrogen, metals (Calcium, Magnesium, Potassium, Sodium, Zinc, Copper, Lead, Cadmium, Mercury, Chromium, Nickel), Carbonates, Bicarbonates, pesticides and Polyaromatic Hydrocarbons (PAHs), in total 20 compounds, in treated domestic wastes. PAHs have also been determined in sediments using another method. 0 1.000 2.000 3.000 4.000 5.000 Chemical Control of Treated Domestic effluents over the years 2008-2018 Number of samples / parameters 2008 2009 2010 2011 2012 2013 2014 2015 2016 2018 2017 Samples Parameters Chemical control of teated domestic effluents over the years 2008-2018  Determination of toxicity Recycled water of tertiary wastewater treatment plants: Microtox Test using Vibrio fischeri (EC50-TU50 measured at 5', 15' and 30'), Daphtox Test using Daphnia magna (EC50- TU50 measured at 24 and 48 hours), Algaltox test using Pseudoklebsiella subcapitata (EC50-TU50 measured at 72 hours)