You should add plant biomass,vegetable.kitchen waste etc etc and moist it.Water should not run out. You can add cow dung also.Mix everything properly and it can be converted aerobically.
Try to look out for a product like MADHYAM in the market manufactured and marketed by Excel cropcare Ltd,Mumbai.It is a mixture of useful microbes. The instructions are given iin the packing or you can get their help.
K.SAINATHAN