The Composting area of the Material Recovery Facility of Passi City is situated beside the recycling center. It is composed of a nursery, demonstration and trial plots, a shredding shed, worm beds, and curing and bagging areas for the finished vermi-cast. The composting facility serves as training ground for barangay workers on the entire composting process.

The MRF employs 2 regular workers supervised by an LGU worker who oversees the composting process. The workers are tasked to shred biodegradable wastes, collect compost enhancers such as kakawate leaves, look after the worm beds and ensure that shredded materials are available, harvest and sieve the vermi-cast and to bag the final product which are sold at the MRF facility.

Biodegradable wastes are brought from the market and are sorted at the grounds of the MRF facility. Only 20% of the wastes can be shredded. These are stored for a couple of days until sufficient kakawate or madre de cacao leaves are gathered. A ratio of 3:1 of biodegradable to kakawate leaves is considered optimum. For 1 ton of wastes about 300 kilograms of leaves are added. The shredded materials are subjected to anaerobic decomposition and are placed inside sacks for about 1 week. After such time, the mixtures are settled in the worm beds for about one and a half months. About 40 kilos of worms are required to process 1.3 tons of materials. The MRF originally acquired 2 kilos of African crawlers; the stock has now grown to about 60 kilos. Gradual harvesting is started when a considerable layer of vermi-cast is produced on top of the bed. The product is then sieved and bagged. On a 2-month operation, the composting facility generated 400 bags (450 kilograms) of compost products.

The MRF workers noted the lack of biodegradable wastes as a primary cause for the low production of compost products. The solid waste generation of Passi City shows that 72 % of total wastes are biodegradable. Presently, the solid waste management system of Passi City is not yet fully in place and segregation in the markets is not yet implemented in a systematic manner. In many instances, the need for the residents and households of Passi City to adopt appropriate solid waste management practices has been highlighted. This requires an integrated program for environmental education and public involvement in solid waste management.

The composting component remains to be an essential part of the solid waste management system in Passi City. The potentials for waste diversion and savings in landfill costs and operations that may be derived from composting and recycling activities are perceived as motivating factors in the implementation of an integrated ecological solid waste management system for Passi City for many years to come. The system includes a plan to establish a bigger MRF and composting facility at the proposed sanitary landfill site in barangay Aglalana. What may be seen today as heroic efforts in composting may prove to be efficient feature in the future.

The current site is the venue for composting lessons in training farmers from barangays Tag-ubong, Himumuangahan, Magdungaw, Sablogon, and Galicanan. Members of th e Integrated Social Forestry Project of the DENR have also been trained. At the barangay level, vermi-compost structures are being set up. The farmers apply the compost to crops including rice, beans, ampalaya, eggplant, crown of thorns, pineapple, and cut-flowers.