Louis Dreyfus Company is building what outlets call the world's largest citrus-effluent-to-biogas facility alongside its orange juice plant in Bebedouro, São Paulo state, with completion now expected before the end of 2026 The Economic Times. The headline event of the day sat inside the food-and-beverage wastewater stream: one mega-project, no enforcement actions, no new municipal tenders, and no spills reported across the wires we covered.
Key takeaways
- Louis Dreyfus Company is building the world's largest citrus-effluent biogas plant at its Bebedouro, São Paulo juice complex, sized at roughly 195,000 m² of built-up area timesofindia.indiatimes.com.
- Designed throughput is around 400 m³ of citrus effluent per hour, yielding more than 50,000 Nm³ of biogas per day (over 1.77 million cubic feet) The Economic Times.
- Process is anaerobic digestion of sugar- and acid-rich juice wastewater, with the biogas upgraded to biomethane and piped to the adjacent juice factory to displace fossil natural gas The Economic Times.
- Company-estimated CO₂ reduction at the juice complex is more than 20% versus the fossil baseline, and 100% of treated water is to be returned to local water resources timesofindia.indiatimes.com.
- Pilot inoculum trials reportedly beat the design biogas yield target by up to 15%, supporting the move to full scale timesofindia.indiatimes.com.
New Builds, Upgrades & Capacity Expansion
Louis Dreyfus Company (LDC) is constructing a large-scale anaerobic digestion and biogas-upgrading facility at Bebedouro, São Paulo state, designed to treat citrus effluent from the adjacent orange juice plant and feed biomethane back into the same industrial operation The Economic Times. The outlet describes the build as the world's biggest of its kind, with the project sized to process 400 m³ of citrus effluent per hour and produce more than 1.77 million cubic feet of biogas a day The Economic Times. Separately, the project's built-up area is reported at approximately 195,000 square metres, with daily biogas output exceeding 50,000 normal cubic metres timesofindia.indiatimes.com. Construction was expected to be completed by mid-2026, according to LDC, with the Economic Times reporting the plant is now expected to be completed before the end of 2026 The Economic Times.
The core process is anaerobic digestion of the dissolved sugars, organic acids and other organics in fruit-washing and juice-extraction wastewater, using an LDC-developed specialised inoculum selected to break down citrus effluent while co-producing biogas; pilot trials with Latin American specialists reportedly exceeded the project's biogas yield target by as much as 15% timesofindia.indiatimes.com. The biogas is processed and upgraded to biomethane, then piped to the nearby juice factory where it displaces natural gas used in industrial heating The Economic Times. LDC says the swap is expected to cut direct carbon emissions from the juice complex by more than 20%, and that 100% of the treated water will be returned to local water resources timesofindia.indiatimes.com. LDC's Brazilian citrus operations cover more than 30,000 hectares of groves and three juice processing facilities timesofindia.indiatimes.com. "The design was intended to maximise positive environmental impacts while strengthening the company's long-term connection with Brazil's citrus sector," said Paulo Hladchuk, global head of the Juice Platform timesofindia.indiatimes.com.
Specification read — food-and-beverage wastewater-to-biogas
Converted into buyer units, the reported 400 m³ of citrus effluent per hour is roughly 9,600 m³/day, or about 9.6 MLD of high-strength fruit-processing wastewater flowing through the new anaerobic line; the 50,000 Nm³/day biogas output is on the order of 175 GWh/year of renewable gas on an energy-equivalent basis, with 1.77 million cubic feet/day equating to roughly 247 million cubic feet annually as the Economic Times reports The Economic Times. The treatment train this class of citrus plant actually needs runs: rotary screening and grit removal for fruit solids → flow equalisation → high-rate anaerobic digestion (UASB or CSTR with a citrus-adapted inoculum) for the bulk of the COD and BOD, which is the unit the news bears on → a polishing biological stage such as MBBR or SBR to knock residual BOD below local discharge consent → tertiary clarification or a DAF unit for suspended solids and any carry-over oil/grease, with the polished water returned to receiving water bodies as the company states timesofindia.indiatimes.com. The recognition sentence: if your juice, citrus or sugar line is running in the 5–20 MLD range with BOD in the 2,000–8,000 mg/L band and seasonal sugar-loading swings that overwhelm your lagoon or activated-sludge basin, this is the project that says "anaerobic digestion plus biomethane reuse" has moved from pilot to a multi-thousand-tonne industrial build — and the equipment you should be sizing next is the post-digestion polishing stage, where a well-specified air-dust and DAF polishing train decides whether the effluent you discharge meets consent. For plants in the adjacent pulp and paper stream, the same anaerobic-plus-polishing logic applies at smaller scale, and food-and-beverage buyers comparing digester options against their existing lagoon retrofit should weigh the operating-cost line first. Operators scoping a 10 MLD citrus line should also benchmark biogas yield per kg of COD removed against the 15% pilot over-yield LDC reported, since that single number drives the project payback timesofindia.indiatimes.com.
FAQ
What does a 9,600 m³/day anaerobic digester cost to build for citrus wastewater?
Capital cost for a high-rate anaerobic digester in this food-and-beverage class is generally in the low single-digit USD per cubic metre of daily capacity, so a 9,600 m³/day citrus line typically lands in a general engineering range of tens of millions of dollars once biogas upgrading and polishing are included; the Bebedouro project itself has not had its contract value reported, and the figure above is a general industry range, not a reported fact The Economic Times.
How long from purchase order to commissioning for a 10 MLD food-and-beverage anaerobic digester?
Engineering, fabrication and biological commissioning for a 5–10 MLD UASB or CSTR digester on a juice or citrus line typically runs 12–24 months; LDC had originally targeted mid-2026 completion for the Bebedouro plant, with the project now reported to be expected to complete before the end of 2026 The Economic Times. This is a general range; suppliers will quote against your effluent characterisation.
How to choose suppliers for citrus wastewater anaerobic digestion and biogas upgrading?
Shortlist on three numbers: demonstrated biogas yield per kg COD on citrus or sugar effluent (LDC reported pilot over-yield of up to 15% versus its target), biomethane purity after upgrading to grid- or boiler-grade spec, and post-digestion polishing capability, where a DAF or MBBR package is the usual differentiator; the 2026 buyer's guide to DAF versus clarifier for food and beverage wastewater covers that comparison in detail, and the IFAS design guide for high-strength beverage wastewater is the relevant adjacent reference for plants weighing biofilm stages timesofindia.indiatimes.com.
