How to Choose OWC Machine Capacity (Kg/Day)

For several representative operating days, weigh only the segregated biodegradable stream that will actually enter the OWC. Avoid including packaging, recyclables, sweeping waste or other streams that will be managed separately.

An average can hide spikes. Banquet functions, weekends, events or seasonal occupancy can create loads far above the ordinary day. Capacity selection should consider how those peaks will be handled: larger machine, staged processing, operational scheduling or another approved route.

Commercial OWC ranges commonly use fixed nominal steps such as 25, 50, 100, 200, 500 and 1000 kg/day. Once you know your measured load, compare the nearest published sizes and then verify connected load, footprint, access and curing space.

Buying a smaller machine and planning to exceed its published daily rating is not a sizing strategy. It reduces operating margin and can turn every peak day into a process-management problem.

A simple one-page record should show measurement dates, normal load, peak load, excluded waste streams, chosen capacity, power availability and curing plan. That record makes procurement and later operations much clearer.

A good sizing note distinguishes ordinary days from recurring peaks. For example, a hotel may have a predictable banquet pattern, while a housing society may see weekend or festival variation. The correct response is not always “buy the largest machine”; it is to document how often the peak occurs, whether it can be scheduled, and what operating margin the shortlisted machine provides under the supplier’s stated guidance.