INAKTIVASI BAKTERI ESCHERICHIA COLI AIR SUMUR MENGGUNAKAN DISINFEKTAN KAPORIT

Air sumur merupakan salah satu sumber air minum terpenting bagi masyarakat, terutama bagi mereka yang tidak dilayani oleh pelayanan kota. Adanya kandungan bakteri Escherichia coli dalam air sumur dapat menjadi penyebab waterborne disease. Kaporit merupakan jenis disinfektan yang dapat digunakan untuk menyisihkan kandungan bakteri E.coli di dalam air sumur. Dalam percobaan ini dilakukan disinfeksi pada larutan artifisial dan sampel air sumur kawasan Purus. Pada percobaan larutan artifisial diperoleh dosis optimum kaporit yaitu 50 mg/l dengan waktu kontak 30 menit untuk menyisihkan bakteri E.coli dari >1,6.105 sel/100 ml menjadi 0 sel/100 ml. Laju inaktivasi bakteri E.coli pada waktu kontak 10 menit untuk tiap dosis kaporit berkisar antara 2,6-log-3-log. Disinfeksi sampel air sumur kawasan Purus pada kondisi optimum menunjukkan hasil yang tidak jauh berbeda dengan disinfeksi larutan artifisial.Kata Kunci: air sumur, disinfektan, E.coli, larutan artifisia

20160314 sk-mengajar-pasca-gnp1516

Mengajar Di Perkim Sarana Prasarana Pemukima

Anammox biofilm process using sugarcane bagasse as an organic carrier

The anaerobic ammonium oxidation (anammox) biofilm process commonly uses various inorganic carriers to enhance nitrogen removal under anaerobic conditions. This study aims to analyze the performance of nitrogen removal in anammox process using sugarcane bagasse as an organic carrier. The experiment was carried out by using an up‐flow anaerobic sludge blanket (UASB) reactor for treating artificial wastewater at room temperature. The reactor was fed with ammonium and nitrite with the concentrations of 70‐150 mg–N/L and variations in the hydraulic retention time of 24 and 12 h. The granular anammox belongs to the genus Candidatus Brocadia sinica that was added as an inoculum of the reactor operation. The experimental stoichiometric of anammox for ΔNO2‐–N: ΔNH4+–N and ΔNO3‐: ΔNH4+ were 1.24 and 0.18, respectively, which is similar to anammox stoichiometry. The maximum Nitrogen Removal Rate (NRR) has achieved 0.29 kg–N/m3.d at Nitrogen Loading Rate (NLR) 0.6 kg–N/m3.d. The highest ammonium conversion efficiency (ACE) and nitrogen removal efficiency (NRE) were 88% and 85%, respectively. Based on this results, it indicated that sugarcane bagasse as organic carriers could increase the amount of total nitrogen removal by provided of denitrification process but inhibited the anammox process at a certain COD concentration