The harvest that also makes electricity: bagasse power south of Lake Okeechobee

I. How a sugar mill becomes a power plant

Engineers call this arrangement cogeneration (one plant producing both heat for the factory and electricity for sale). The mill needs steam to process sugar anyway, so the boilers and turbines are sized to make more power than the factory uses and sell the surplus. The largest of these operations in the Everglades Agricultural Area, the roughly 700,000 acre block of farmland south of the lake, is run by Florida Crystals and its New Hope Power Partnership near South Bay.

At last public report the facility is rated on the order of 140 megawatts, which federal data lists as biomass capacity, and the operator often describes it as one of the largest plants of its kind in North America. A reader can confirm the exact nameplate rating and the fuel categories in the Energy Information Administration generator files, which name each unit, its fuel, and its owner.

II. The honest math on what counts as clean

Burning plant fiber counts as renewable in most accounting because the carbon in this year's cane came out of this year's air, unlike coal or gas pulled from underground. That is a real case for calling bagasse power clean. It also runs steady, which solar and the afternoon sea breeze do not, so it fills a slot on the grid that intermittent sources cannot.

The plant still burns something, and combustion still puts out particulate matter, nitrogen oxides, and carbon dioxide. Whether that nets out as clean depends on how the landfill avoidance, the field practices, and the local air quality are weighed against the emissions at the stack. The federal eGRID database publishes plant level emission rates, so the tradeoff is not a matter of trust, it is a matter of looking it up.

III. Who runs it, and the burning you can see from the road

Two sugar companies dominate the Glades, Florida Crystals around South Bay and Pahokee and U.S. Sugar around Clewiston, and both have long burned bagasse for power. Florida Power and Light buys and distributes the electricity, and the Florida Public Service Commission regulates those rates and the utility's long range plans. The land itself sits inside the Everglades Agricultural Area, which the South Florida Water Management District oversees for drainage and restoration, so siting and water questions run through a state agency, not just a county.

One honest clarification, because readers in the Glades will ask. The smoke many residents see and smell during harvest is mostly pre-harvest field burning, where growers set fire to standing cane to clear the leaves before cutting, a separate and long debated practice. The power plant stack is a different source with its own permits and monitoring, and conflating the two muddies the question of what the generators actually emit.

IV. Worth watching this month

1. The sugarcane harvest ramps up across the Everglades Agricultural Area through late October and into winter, which is routine and simply means the biomass plants shift back to bagasse as their main fuel.

2. The Energy Information Administration refreshes its generator level data periodically, so anyone wanting current nameplate capacity and fuel splits should check the latest EIA-860 and EIA-923 releases rather than older figures.

3. Watch the Florida Public Service Commission docket calendar for any Florida Power and Light filings that touch renewable or biomass purchases, usually routine but occasionally setting rates worth noting.

4. Air quality during harvest season is worth a glance for anyone with asthma near the Glades, though that tracks field burning far more than the power plants, and state and local agencies post advisories.

5. The South Florida Water Management District's Everglades restoration updates can slowly shift how much farmland stays in cane, which matters more for the long run fuel supply than any single week.

What is bagasse?

It is the dry, fibrous material left after sugarcane is crushed to extract the juice. Mills burn it to make steam and electricity, so it is a farm byproduct rather than a purchased fuel.

Is bagasse power really renewable?

It is classified as renewable because the carbon released was recently absorbed from the air by the growing cane, unlike fossil fuels. It still produces stack emissions, so renewable and zero emission are not the same thing.

How big is this compared with Florida solar?

Biomass is a much smaller share of the state's generation than natural gas and a growing solar fleet, but it runs around the clock, which most solar does not. At last public report the main Glades biomass plant is on the order of 140 megawatts.

Where can I verify the plant's size and fuel?

The Energy Information Administration publishes generator level files that list each unit's capacity, fuel, and owner. The operator's own pages and the EPA's eGRID add fuel mix and emission detail.