H2S AND NH3 DISPERTION ANALYSIS FROM GEOTHERMAL POWER PLANT EMISSION AND ITS INFLUENCE TO AMBIENT AIR QUALITY (CASE STUDY: PT. PERTAMINA GEOTHERMAL ENERGY AREA KAMOJANG)

• Main Author: DWI PUTRANTO (NIM : 25314743), ANGGA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21091
• Institution: Institut Teknologi Bandung

Pertamina Geothermal Energy (PGE) Kamojang Area is one of the largest geothermal energy producer in Indonesia, has environmental concern from Geothermal Power Plant emission which contained non-condensable gas (NCG) such as CO2, H2S and NH3 emitted to ambient air. The study only focused to H2S and NH3 as most harmful when inhaled humans than all NCG emissions result from Geothermal Power Plant. Source emission output cooling tower PLTP Unit IV and V belonging to PGE Kamojang and PLTP Unit I, II, and III belong PT.Indonesia Power supplied steam from PGE as the main largest producer of H2S and NH3 from geothermal power plants activities. Dispersion simulations performed using software AERMOD view 6.71. Analysis assimilative capacity of the ambient air around Geothermal Area Kamojang required to estimate the maximum load acceptabel atmosphere in adjusting levels of pollutants emitted into the environment. Scenario modeling is an annual, seasonal and based on the rate of emissions. Modeling results showed a maximum concentration per 8 hours for H2S and NH3 amounted to 228,79 ug/m3 and 6,23 ug/m3. As for the 24-hour maximum concentration of H2S and NH3 amounted to 76,26 ug/m3 and 2,07 ug/m3. All concentrations of model results are below the ambient air quality standard of 8 hours and 24 hours. The simulation results obtained seasonal concentration in the rainy season is greater than the dry season. Ventilation Coefficient, as estimates show assimilative capacity in the mornings and evenings in 2000 m2s-1 and at night which shows the high value of the potential pollutant. Assimilative capacity value in PLTP Kamojang environment still shows high number for H2S which are amounted to 17,73 μg/m3 and for NH3 pollutant amounted to 1362,14 μg/m3.