This study aims to utilize agricultural waste in the form of corn cobs (Zea mays L.) and rice husks (Oryza sativa) as raw materials for briquette production through the pyrolysis method to generate environmentally friendly alternative energy. The background of this research is based on the high production of agricultural waste that has not been optimally utilized and the increasing energy demand that requires renewable energy sources. The research method includes several stages: drying the raw materials, performing pyrolysis to produce charcoal, grinding and mixing with a binder, and molding the mixture into briquettes. The observed parameters include moisture content, ash content, calorific value, and burning time of the briquettes. The results showed that the combination of corn cobs and rice husks produced briquettes with good quality, characterized by low moisture content, relatively high calorific value, and stable burning performance. These findings demonstrate that corn cobs and rice husks waste can be processed into briquettes as an alternative energy source with the potential to replace fossil fuels and support the concept of sustainable energy.
Giovani Mei, Anggasta Telaumbanua, Muhammad Farhan et al.· Indonesian Journal of Chemic...· 0 citations
This study aims to determine the effect of liquid organic fertilizer (LOF) made from gamal leaves (Gliricidia sepium) on the growth of bird’s eye chili (Capsicum frutescens L.) as an alternative to natural urea fertilizer. The research is based on the high demand for fertilizers in chili cultivation and the negative impacts of excessive chemical fertilizer use on soil and the environment. Gamal leaves contain essential nutrients such as nitrogen (N), phosphorus (P), and potassium (K), which support plant growth. The experiment used various concentrations of gamal leaf LOF applied to chili plants, with observations on plant height, leaf number, and other morphological traits. Results showed that gamal leaf LOF positively affected plant growth, with certain concentrations performing better than the control. This indicates that gamal leaf LOF can serve as an eco-friendly and sustainable alternative to natural urea fertilizer.
A. F. Pulungan, Grandy Sihotang, Immanuel Veron Silitonga et al.· Indonesian Journal of Chemic...· 0 citations
This study aims to evaluate the effectiveness of active compounds contained in several plant species as botanical pesticides to control mealybug pests (Pseudococcus lilacinus). Mealybugs are major agricultural pests that damage plants by sucking cell sap, leading to growth inhibition and yield loss. The excessive use of synthetic pesticides poses health and environmental risks and promotes pest resistance. Therefore, botanical alternatives are needed for safer and sustainable pest control. The research used plant extracts containing bioactive compounds such as alkaloids, flavonoids, saponins, tannins, and terpenoids, which act as contact poisons, antifeedants, and growth inhibitors. Laboratory tests were conducted to evaluate mortality rates of mealybugs under different extract concentrations. The results showed that certain plant extracts significantly increased mealybug mortality, indicating their potential as effective botanical pesticides. This finding supports the use of plant-based pesticides as an eco-friendly alternative to synthetic chemicals.
Grandy Sihotang, Immanuel Veron Silitonga, Dela Oktavianti et al.· Indonesian Journal of Chemic...· 0 citations
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