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Private composting firm pitches kiosks, downtown restaurant program and school partnerships to Middleton committee
Summary
GreenBox, a Sun Prairie‑based composting company, presented three models — downtown restaurant outreach, smartphone‑enabled drop‑off kiosks, and subsidized curbside swap service — and discussed metrics, contamination controls and potential coordination with a Dane County USDA grant that includes a planned Middleton kiosk.
Ben, founder of GreenBox, told the Middleton Sustainability Committee that his company now serves about 900 residential customers and 40 businesses across the Madison area and diverts roughly 10 tons of food waste a week from landfills.
"We now divert about 10 tons of food scraps a week, from the landfill," Ben said, describing GreenBox’s service area and scale. He said roughly 50 residential members are in Middleton and that commercial partners include Epic and Exact Sciences.
GreenBox outlined three program models for Middleton: targeted downtown restaurant outreach to capture high‑volume point sources; smartphone‑enabled, lockable drop‑off kiosks that require a short onboarding step to reduce contamination; and subsidized curbside cart swap subscriptions for residents who prefer home collection. Ben said kiosks are inexpensive to operate and highly visible, whereas curbside subscriptions are more convenient but costlier to subsidize.
On schools, Ben said the company has worked with multiple districts and described how district programs can provide education and a full‑circle demonstration — collecting food scraps and returning finished compost to school gardens. He cautioned that some previous school programs were grant‑dependent: "Currently, there's only 1 left because they were composting on a grant and they only had enough for 1 more school," he said.
Committee members pressed on funding, environmental benefit, and apartment‑building access. Ben said GreenBox’s services are fee‑based and that city involvement would be required for free public kiosks or broad subsidies, but that program design can lower per‑dollar cost. Responding to lifecycle concerns about vehicle mileage and processing energy, Ben said the company’s calculations show the operations are "way net negative" for greenhouse‑gas emissions as routes and infrastructure scale, and offered to provide EPA materials and fact sheets to the committee.
High‑school green team representative Brad offered student support for school rollouts and noted past compost systems in schools had been decommissioned; Ben agreed to provide materials and meet with the high‑school green team to share results and metrics.
Kelly (city staff) and several committee members discussed coordination with county work: staff confirmed Middleton is included in a Dane County/USDA pilot that would place at least one drop‑off kiosk in Middleton and that the county has hired a project manager to operate and report diversion metrics. Ben said GreenBox could be part of that county pilot or operate alongside it.
The presentation closed with Ben offering tours of his Sun Prairie facility and promising follow‑up materials on lifecycle analysis, diversion metrics and program costs. Committee members asked staff to follow up on grant coordination and recommended GreenBox provide a short factsheet for the committee to circulate.
