The VRF Composting Methodology involves the following steps:
On a level land, mark an area of 1.8m (6 feet) width and 8m (26 feet) length and construct a mud bund to a height of about 10cm (4 inches) on all the four sides.
Spread a black HMHDPE (90 gauge thick) plastic sheet of 2.7m (9 feet) width over the built-in area, so that a shallow tank is formed. Over this sheet, construct the heap to about 1m height layer by layer using different materials.
If necessary, water is sprinkled after each set of layer is made, so that the moisture content in the material at the time of heaping is about 70 percent and also that about 2.5cm (1inch) height of water accumulates at the bottom of the heap. If dry, pre-wet the material 5 to 10 days before heap formation.
The heap is covered fully with the black HMHDPE sheet. It is made secure by pressing wet mud all around along the base of the heap. The sheets are further covered using coconut leaves/dry grass/old gunny bags so as to protect them from deterioration due to sunlight. Heaps under natural shade do not require the additional covering. Protect the heap from animal disturbance.
The compost is ready for application within three to six months. It could be stored for some period. Mix the material well before applying.
A standard heap (2.1m wide X 8m long X 1m high) can take about 4-6 tonnes of wet material. The final composted material would weigh approximately 60% of original material.