Biogas purification using the biosludge-dolomite mixture to improve methane gas purity in waste management practicum

Abstract

Biogas extracted from cattle dung waste not only tackles soil and air pollution but also produces methane, which is used in households as fuel for water heaters, cooking stoves, or cloth dryers. The production of biogas also supports a zero-waste approach, which targets eliminating waste by reducing, reusing, and recycling. Therefore, it is necessary for biogas extracted from cow dung waste to be purified and packaged for more efficient use and easier marketing. This study aims to determine the effects of dolomite and biosludge adsorbent in the purification of biogas. Furthermore, the biogas was extracted at 15, 30, 45, 60, 90, 120, 150, and 180 minutes with 3 repetitions during each time period, and methane gas quality tests were carried out in the Balingtan Laboratory, Jaken, Pati, Central Java, Indonesia. Data obtained were analyzed using the RStudio computer application, and the result reveals that the average values for the production of CH4, CO2, and N2O were 3.8 × 105 (80.9%) ppm, 8.9 × 105 (19.1%) ppm, and 9.0 × 102 ppb (0.0002%) respectively. Therefore, the differences in the dimensions of pipes and extraction time had no significant effect on the amount of CH4, CO2, and N2O gas produced.