Vermicomposting units: earthworm-based conversion of pre-digested organic waste.

No. Fresh waste heats up as it begins to decompose and will drive the worms away or kill them. Waste must be pre-decomposed for a period in a separate area and allowed to cool before it is laid on the beds in thin layers. Skipping that stage is the single most common cause of a failed vermicomposting unit.

Oily and salty food, heavily spiced waste, large quantities of citrus, and meat, fish and dairy. These either harm the worms, attract pests, or create anaerobic pockets in the bed. A premises whose waste is dominated by cooked, oily food is generally better served by a mechanical or in-vessel composter.

It is a biological process, so the honest answer is that it depends on temperature, feed rate, moisture and the maturity of the bed rather than on a fixed number. Harvest intervals settle into a rhythm once a bed is established; a new unit takes longer while the worm population builds up. The pre-decomposition stage adds to the front of every cycle.

A mechanical composter uses power and machinery to compress the active phase into a short cycle in a small footprint. Vermicomposting uses almost no energy but needs more area, a shaded and temperature-stable location, and an operator who tends the beds rather than presses a button. It produces a finer, higher-quality soil conditioner; it is less tolerant of variable and unsuitable feed.

Daily attention to moisture (beds should be damp, never waterlogged) controlled thin-layer feeding, turning and levelling as required, protection against ants and rodents, drainage of vermiwash, and periodic harvesting with separation of worms from finished compost. It is light work, but it is daily work and it does not tolerate long neglect.

Vermicomposting is a recognised composting route, so where it genuinely processes the premises' wet waste it can form part of a bulk generator's compliance under the Solid Waste Management Rules 2016. What matters to an inspection is that the installed capacity matches the waste actually generated and that records show the waste is being processed, not that a token bed exists in a corner.