QUALITY TESTING AND EFFECTIVENESS TESTING ON SEVERAL 3R TPS COMPOSTS IN BALI

The study titled “Quality and Effectiveness Test of Several Composts from TPS 3R in Bali” was conducted by the research team from the Agroecotechnology Study Program, Faculty of Agriculture, Udayana University. The research is motivated by the increasing amount of waste in Bali, where organic waste constitutes over 60% of total waste. To address this issue, the Bali Provincial Government established 3R Waste Processing Facilities (TPS 3R) in various traditional villages.

This research aims to evaluate the quality and effectiveness of composts produced by several TPS 3R locations in Bali — namely Panca Lestari (Tanjung Benoa), Padang Tegal Compost House (Ubud), the Recycling Center of Denpasar Environmental Agency, and Kedonganan TPS 3R.

The quality test was conducted following the Indonesian National Standard (SNI 19-7030-2004), which assesses parameters such as moisture content, pH, C/N ratio, organic matter, and nutrient composition (N, P, K). The effectiveness test used water spinach (Ipomoea reptans Poir) as an indicator crop to evaluate compost influence on plant growth.

Results showed that compost quality varied among the TPS 3R sites, with only the Padang Tegal Compost House meeting all SNI standards. Other TPS 3R composts still require improvement, particularly in C/N ratio and carbon content. Nevertheless, the effectiveness test demonstrated that compost application increased plant biomass (fresh and dry weight) at certain doses, especially in later growth stages.

This research contributes to sustainable waste management and organic agriculture development in Bali, reinforcing the circular economy approach in managing limited natural resources.