Lt-AD · Project

Cold Wastewater Treatment That Cuts Dairy Plant Operating Costs by Over €1.6M Yearly

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Imagine your factory produces huge amounts of dirty water every day, and right now you're burning fossil fuels just to clean it up — like running your heating full blast to do the dishes. This Irish company figured out how to clean industrial wastewater using bacteria that work at cold temperatures (as low as 4°C), skipping the expensive heating step entirely. The process also captures biogas you can sell or reuse, turning a waste problem into a revenue stream. It's specifically designed for dairy and food processing plants that generate massive volumes of low-strength wastewater.

By the numbers

€1,662,106

Annual OPEX savings vs aerobic treatment (for 2,000 m³/day dairy plant)

2.49 years

Payback period including RHI revenue

€374,176

Annual Renewable Heat Incentive revenue

367 billion litres

Annual European milk processing sector wastewater volume

4–20°C

Operating temperature range (ambient, no heating needed)

< 125 mg/L COD

Effluent quality meeting UWWD standard

100%

Biogas available for reuse or resale (none consumed by heating)

2,000 m³/day

Reference dairy plant wastewater volume used in economic model

The business problem

What needed solving

Food and dairy processing plants generate enormous volumes of wastewater — the European milk sector alone produces over 367 billion litres annually. Current aerobic treatment is expensive, energy-hungry (relying on fossil fuels for aeration), produces large amounts of sludge, and takes up significant on-site space. Plants are paying a fortune to treat waste when they could be generating energy from it.

The solution

What was built

NVP Energy built and commissioned a demonstrator plant for their low-temperature anaerobic digestion (Lt-AD) system, designed to treat low-strength wastewater at ambient temperatures (4–20°C) without heating. The project collected 8–12 months of operational data and pursued Environmental Technology Verification (ETV) assessment to build the commercial business case.

Audience

Who needs this

Dairy processing plants with high-volume wastewater dischargeBrewery and beverage manufacturers facing rising treatment costsFood processing companies under pressure to reduce greenhouse gas emissionsIndustrial wastewater treatment service providers seeking better economicsFacilities managers at food factories looking to cut energy costs and sludge disposal

Business applications

Who can put this to work

Dairy Processing

enterprise

Target: Milk processing and treatment plants

If you are a dairy processor dealing with thousands of cubic metres of wastewater daily — this project developed a cold anaerobic digestion system that eliminates the need for energy-intensive aeration. For a plant producing 2,000 m³ of wastewater per day, it can deliver annual OPEX savings of €1,662,106 with a payback period of just 2.49 years. The compact design also frees up valuable on-site space compared to conventional aerobic treatment.

Beverage Manufacturing

mid-size

Target: Breweries, soft drink producers, and juice processors

If you are a beverage manufacturer struggling with rising wastewater treatment costs and tightening environmental regulations — this technology treats low-strength wastewater at ambient temperatures (4–20°C) without heat input. It produces effluent meeting Urban Wastewater Directive standards (below 125 mg/L COD) without post-aeration. Plus, 100% of the biogas produced is available for reuse or resale, creating a new revenue line.

Industrial Water Services

any

Target: Companies providing outsourced wastewater treatment to food factories

If you are a water services provider looking to offer better economics to food industry clients — this technology produces negligible sludge volumes, requires no biogas recirculation, and operates at ambient temperatures. That means dramatically lower operational costs compared to the aerobic systems you currently maintain. With 8–12 months of demonstrator plant data from this project, you can evaluate whether to license or partner for deployment.

Frequently asked

Quick answers

How much money can this actually save my plant?

For a dairy processing plant producing 2,000 m³ of wastewater per day, the project data shows annual OPEX savings of €1,662,106 compared to conventional aerobic treatment. This includes RHI (Renewable Heat Incentive) revenue of €374,176. The payback period is 2.49 years.

Can this handle full industrial-scale volumes?

The project was specifically a Phase 2 SME Instrument, meaning it installed and commissioned a demonstrator plant to collect 8–12 months of operational data. The economic projections are modelled on a plant handling 2,000 m³ of wastewater per day, which is a typical dairy processing scale.

Who owns the IP and how can I license it?

NVP Energy Limited, the Irish SME coordinating this project, owns the core technology. The project objectives explicitly mention assessment and protection of IP assets. Licensing or partnership enquiries would go through NVP Energy directly.

Does the treated water meet discharge regulations?

Yes. The project data states the Lt-AD system produces effluent meeting Urban Wastewater Treatment Directive (UWWD) standard, specifically below 125 mg/L COD, without requiring post-aeration. This is a key regulatory benchmark across the EU.

What temperature range does this system work in?

The system operates at ambient temperatures between 4°C and 20°C, requiring no heat input whatsoever. This is what makes it fundamentally different from conventional anaerobic digestion, which typically needs heating to 35–55°C. The cold operation means 100% of biogas produced is available for reuse or resale.

How long until this is commercially available?

The project ran from June 2016 to May 2018 and included building a demonstrator plant with 8–12 months of operational data collection. NVP Energy described this as 'first to market' technology and planned commercialisation partner development as a key objective. Based on available project data, the technology was being prepared for market entry upon project completion.

Consortium

Who built it

The consortium is lean and commercially focused: 3 partners across Ireland and the UK, all private companies, all SMEs. There is zero academic involvement, which is unusual for EU projects and signals this is purely about getting a product to market, not generating research papers. NVP Energy Limited in Ireland leads as the technology owner. The 100% industry ratio and SME-2 funding scheme confirm this was a commercialisation-stage project, not early research. For a business buyer, this means the technology was developed with market deployment in mind from the start.

NVP ENERGY LIMITEDCoordinator · IE

How to reach the team

NVP Energy Limited is an Irish SME — their team can be reached through their project website or LinkedIn

Order a report on this consortium See NVP ENERGY LIMITED profile →

Next steps

Talk to the team behind this work.

Want an introduction to NVP Energy to discuss licensing or deployment of Lt-AD technology for your plant? SciTransfer can arrange a direct meeting with their technical and business team.

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