Daily to Alternate-Day: What Has to Be True Before You Cut a Collection

Friday, 9:40 p.m. The last service ends, the bin goes out for a Saturday morning collection, and by Sunday afternoon it is full again with a lid that will not close. That is the pattern at sites that try to move from daily to alternate-day collection without changing anything else: the saving looks obvious on paper and collapses on the second weekend, which is precisely when nobody senior is on site to fix it.

Cutting a collection is a legitimate and often large saving. It is also the point where a dosing programme stops being a hygiene measure and becomes load-bearing infrastructure. Before the contract changes, four conditions have to be true, and all four are measurable.

Condition one: capacity across the peak, not the average

Average daily volume is a comfortable number that will mislead you. What matters is the busiest two consecutive days, because that is the load a two-day cycle has to absorb. Pull four weeks of bin counts and find the peak pair; if the kitchen fills 1.4 bins on a normal day and 1.9 on a Friday, alternate-day collection needs capacity for four bins across the weekend, not two.

Most sites that fail this test do not need a bigger bin. They need a second container for the Friday surge, or a small caddy for the stream that generates most of the liquid, split off from the solids.

Condition two: the gel holds for the full dwell

A gel that survives twelve hours is not the same product behaviour as a gel that survives forty-eight. Free liquid continues to migrate, soluble solids continue to break down, and temperature does the rest. Run a hold test before you commit: fill a bin as normal, dose it, close it, and open it at twenty-four and forty-eight hours, checking for standing liquid, lid condensation and smell. Photograph both. If day two fails, you have your answer for the cost of one bin.

Condition three: lids, seals and shade

Doubling the dwell time doubles the exposure to flies, rain and sun. A lid that warped two summers ago and no longer seats is survivable on a daily cycle and a disaster on a two-day one. Check the gasket line, the hinges and the drainage holes, and move the bin stand out of direct afternoon sun if the site allows it. A cheap shade structure often pays for itself in one summer of avoided complaints.

Condition four: someone owns the second day

On a daily cycle, a bad night is corrected within hours by the next collection. On a two-day cycle, a bad night sits in the yard for a day and a half. That means the check at close has to be genuinely done, not initialled. Name a person per shift, give them the tilt test and a phone number, and agree in advance what happens if a bin fails on a Saturday: a backup container, a dose correction, or a paid extra lift. Sites that skip this step usually discover the gap through a neighbour complaint rather than an internal one.

Run it as a trial, then renegotiate

Four weeks, one route, one bin set, with weight tickets and a daily photo. Compare kilograms per lift, not per bin, because a two-day bin is heavier and the per-lift number is what the hauler will price. Expect a reprice rather than a straight halving of the invoice: collection costs have a fixed component, and a fair contract will show it. Check the notice period before you start, since some agreements require eight weeks.

The counterintuitive part: the sites that save most are not the ones with the least waste, they are the ones with the most disciplined close-down. Volume buys you the option; routine decides whether you keep it. For dose rates that hold a bin for forty-eight hours in summer, the SAP powder product guide covers the slower-hydrating grades.

This week, count bins for seven consecutive days including the weekend, and run one forty-eight-hour hold test. Those two data points will tell you whether the frequency conversation is worth having at all.