Question: asking about vermicompost preparation-
Answer: suggested-

materials for preparation of vermicompost

any types of biodegradable wastes-

crop residues 
weed biomass 
vegetable waste 
leaf litter
hotel refuse
waste from agro-industries
biodegradable portion of urban and rural wastes
phase of vermicomposting

phase 1

:

processing involving collection of wastes, shredding, mechanical separation of the metal, glass and ceramics and storage of organic wastes.

phase 2

:

pre digestion of organic waste for twenty days by heaping the material along with cattle dung slurry.  this process partially digests the material and fit for earthworm consumption.  cattle dung and biogas slurry may be used after drying.  wet dung should not be used for vermicompost production.

phase 3

:

preparation of earthworm bed. a concrete base is required to put the waste for vermicompost preparation.  loose soil will allow the worms to go into soil and also while watering, all the dissolvable nutrients go into the soil along with water.

phase 4

:

collection of earthworm after vermicompost collection.  sieving the composted material to separate fully composted material.  the partially composted material will be again put into vermicompost bed.

phase 5

:

storing the vermicompost in proper place to maintain moisture and allow the beneficial microorganisms to grow.