Prorheno Ag

What Prorheno Ag does

ProRheno AG is a publicly owned Swiss wastewater treatment utility headquartered at Grenzstrasse 15 in Kleinhüningen, Basel, jointly commissioned by the cantons of Basel-Stadt and Basel-Landschaft. Originally founded in 1974 as a consortium that included pharmaceutical firms Ciba-Geigy, Sandoz, and Roche, the company was renamed ProRheno AG on 23 June 1997 and now operates under full cantonal ownership. It treats approximately 28 million cubic metres of municipal and industrial wastewater per year for a cross-border population of roughly 270,000 residents across Basel-Stadt, Riehen, Bettingen, six Basel-Landschaft municipalities, and cross-border communities in France and Germany.

The company runs three integrated facilities on a 76,300 m² site: ARA Basel (municipal treatment using nine Sequencing-Batch-Reactors up to 12,100 m³ each, an Anammox process-water treatment train, and a 4th treatment stage commissioned in July 2025 combining ozone, powdered activated carbon, and 14 sand-filter chambers); ARA Industrie (industrial pre-treatment receiving waste via dedicated leak-monitored tunnels); and a sludge treatment line of four anaerobic digesters, three fluidised-bed incinerators (each 3,000 kg TS/h, with 32,000 t/year external sludge capacity), and grid-quality biogas upgrading (>96% methane). On-site solar PV (~570,000 kWh/year) and waste-heat supply to IWB's district heating network (~42.6 GWh/year) anchor a circular-energy model.

ProRheno AG operates on a cost-recovery basis funded by cantonal budgets, public infrastructure allocations, and fees from connected municipalities and industrial clients for wastewater treatment, sludge disposal, and special-waste acceptance. Pricing is not publicly disclosed; arrangements are contractual with public authorities. Additional revenue streams include direct-fee acceptance of sewage sludge (up to 32,000 t/year capacity) and settlement sediments from firms and private individuals, plus licensed special-wastewater disposal services. The company distributes via sewer infrastructure for municipal clients and direct facility delivery (with pre-registration) for industrial and disposal clients, supported by community engagement through free guided tours and a high-profile open-day that drew ~2,000 visitors in April 2026.

Name

Prorheno Ag

Legal name

ProRheno AG

Website

https://www.prorheno.ch

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

11–50 employees

Short description

ProRheno AG is a cantonal public utility in Basel that treats about 28 million m³ of municipal and industrial wastewater per year for ~270,000 residents across Switzerland, France, and Germany, and operates sludge incineration, biogas upgrading, and licensed special-waste disposal services.

Ownership category

akta.pro rank

Product category

Municipal Wastewater Treatment Services

NAICS

Sewage Treatment Facilities (22132), Water, Sewage and Other Systems (2213), Solid Waste Combustors and Incinerators (562213), Hazardous Waste Treatment and Disposal (562211)

SIC

Sanitary Services (4950), Refuse Systems (4953), Hazardous Waste Management (4955)

akta.pro primary industry

Anaerobic Treatment & Resource Recovery (Biogas/Co-digestion) (EUANADAH)

akta.pro secondary industries

Industrial Wastewater & Effluent Treatment Services (BPALAHAD), Industrial Sludge & Byproduct Management (BPALAHAG), Anaerobic Digestion (Wet/Dry AD) & Biogas Production (EUAIAEAD), Biogas/RNG Plant Development, EPC & Project Delivery (EUAAAEAH), Anaerobic Digestion (AD) & Biogas/RNG Production (Organics Feedstocks) (BPALAEAC)

Keywords

• Municipal wastewater treatment
• Industrial wastewater pretreatment
• Sewage sludge incineration
• Micro-pollutant elimination
• Biogas grid injection

Headquarters

HQ city

Klein-basel

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Technology or R&D, Infrastructure, Personnel, Operations, Others

Revenue model

1. Municipal Wastewater Treatment Services: ProRheno AG is a publicly owned (cantonal) utility commissioned by the cantons of Basel-Stadt and Basel-Landschaft. It operates on a cost-recovery basis funded by municipal budgets, public infrastructure allocations, and service fees charged to connected municipalities and industrial clients for wastewater treatment, sludge disposal, and special wastewater acceptance. No public pricing schedule is disclosed; arrangements are contractually defined with public authorities.
2. Sewage Sludge and Special Wastewater Acceptance: ProRheno AG accepts external liquid and dewatered sewage sludge (up to 32,000 t/year capacity) and certain controlled / special wastes at its licensed facility for a fee. These disposal services generate direct revenue from municipalities, contractors, and industrial firms. Settlement sediment acceptance (fecal pits, pump sumps, construction toilets, etc.) is available to firms and private individuals with prior registration, with no minimum or maximum quantity restrictions.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

ProRheno AG treats municipal and industrial wastewater and provides sludge and special wastewater disposal services. The ARA Basel facility processes approximately 28 million m3 of communal and industrial wastewater per year for a cross-border catchment of about 270,000 residents; ARA Industrie pre-treats industrial wastewater from chemical, pharmaceutical, and manufacturing clients; and the Schlammbehandlung facility thickens, dewaters, anaerobically digests, and thermally recovers sludge in three fluidized-bed incinerators while producing biogas for grid injection. The company also accepts external sewage sludge and special wastewater at its licensed facility and supplies waste heat to the IWB district heating network.

Product overview

ProRheno AG operates a comprehensive wastewater treatment infrastructure centered on three main facilities: ARA Basel (municipal wastewater treatment using SBR technology and advanced 4th-stage micro-pollutant elimination via ozone and activated carbon), ARA Industrie (industrial wastewater pretreatment), and Schlammbehandlung (sludge treatment including anaerobic digestion producing biogas and combustion in three fluidized bed furnaces). The company provides energy services including district heating supply to IWB, solar power generation, and biogas injection into the natural gas grid. Additional services include special wastewater disposal, settlement and sewage sludge acceptance, and amphibian rescue programs. Shared operational infrastructure includes a 24/7 process control system and on-site laboratory for continuous monitoring.

Differentiator

Problem solved

Functional benefit

Products and services

• ARA Basel (Municipal Wastewater Treatment) Municipal wastewater treatment plant that processes approximately 75,000 cubic meters of wastewater per day (~28 million m3 annually) for the Basel-Stadt region and surrounding municipalities, using Sequencing-Batch-Reactor (SBR) technology and a 4th treatment stage for micro-pollutant elimination. Serves approximately 270,000 residents across Switzerland, France, and Germany.
• ARA Industrie (Industrial Wastewater Pretreatment) Industrial wastewater pretreatment facility that receives industrial wastewater through dedicated tunnels and pre-treats it in multiple stages (screening, neutralization, primary clarification) before controlled transfer to ARA Basel for biological treatment. Leaks in transport tunnels are monitored by sensors.
• Schlammbehandlung (Sludge Treatment and Incineration) Sludge treatment facility that converts sewage sludge into usable energy through thickening, dewatering, anaerobic digestion (biogas production), and thermal recovery in three fluidized-bed furnaces (capacity 3,000 kg TS/h each, up to 32,000 tonnes/year of external dewatered sludge).
• Annahme von Siedlungsschlamm (Settlement Sediment Acceptance) Acceptance and treatment of settlement sediments (sludges from settlement drainage) including fecal pits, wastewater pump sumps, construction toilets, rainwater collectors, and sewer systems. Available around the clock with no minimum or maximum quantity for firms and private individuals (firms pre-register via shift telephone).
• Annahme von Klärschlamm (Sewage Sludge Acceptance) Acceptance and disposal of liquid and dewatered municipal sewage sludge from external clients. Liquid sludge is accepted by road tanker; dewatered sludge is processed in three fluidized-bed combustion furnaces with capacity up to 32,000 tonnes/year.
• Spezialwasserentsorgung (Special Wastewater Disposal) Licensed special waste disposal service for certain special and other controlled wastes requiring specialized technical and organizational measures for environmentally sound disposal. Enquiries are handled by direct contact to assess feasibility before acceptance.

Quantifiable outcome

• 28 million m³/year of communal and industrial wastewater treated, protecting the Rhine and downstream water bodies.
• +6 more outcomes

Named customers6 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Four partnerships are on record, tiered core and minor.

• EnAW (Energie-Agentur der Wirtschaft)coreStrategic or Co-development Partner · 1 January 2020ProRheno voluntarily participates in the EnAW CO2 reduction programme, which is recognised by the Swiss Confederation, cantons, and economic partners. The voluntary target agreement commits ProRheno to actively reducing CO2 emissions and optimising energy efficiency. This partnership signals institutional commitment to climate protection beyond regulatory compliance.
• IWB (Industrielle Werke Basel)coreStrategic or Co-development Partner · 1 January 1998Since 1999, ProRheno has supplied waste heat from its sludge combustion to IWB's district heating network (~42.6 GWh/year, ~3% of IWB's heat sales, heating ~4,600 apartments). In 2009 the heat partnership was expanded to include summer cooling for the neighbouring Stücki Shopping Centre and Business Park. ProRheno's biogas (>96% methane) is also fed into IWB's natural gas grid. The relationship is long-term, infrastructure-based, and central to ProRheno's energy strategy.
• Amt für Umwelt und Energie (AUE) Basel-Stadt, Abteilung ImmissionencoreStrategic or Co-development PartnerThe Office for Environment and Energy of Basel-Stadt is ProRheno's regulatory licensor and partner. It receives daily laboratory data on wastewater, exhaust air, flue gas, and ash analysis from ProRheno. The AUE grants and oversees ProRheno's operating licences, including the acceptance permit for special controlled wastes.
• Stücki Shopping Centre and Business Park (adjacent to ProRheno site)minorStrategic or Co-development PartnerHeat and cooling from ProRheno's sludge combustion partially supplies the neighbouring Stücki Shopping Centre and Business Park, in addition to IWB's wider district heating network.

Scale indicators11 records

Recent moves10 records

Expansion highlights5 records

Direct peers

• Berliner Wasserbetriebe: Largest German municipal water and wastewater utility, publicly owned by the State of Berlin, serving ~3.7 million residents. Highly comparable to ProRheno as a publicly mandated, cost-recovery wastewater utility operating large-scale centralised treatment with energy recovery and biogas utilisation.
• Hamburg Wasser: Public water and wastewater utility owned by the City of Hamburg, operating large-scale municipal treatment and sludge processing. Closely comparable to ProRheno in mandate structure, scale and energy-recovery orientation (including heat reuse and biogas).
• Stadtentwässerung Zürich (ARA Werdhölzli): Publicly owned municipal wastewater treatment arm of the City of Zürich, operating Switzerland's largest WWTP at Werdhölzli. Direct Swiss peer to ProRheno in regulatory regime, treatment-train sophistication, and sludge-to-energy integration.
• Stadtentwässerung München (Kläranlage Gut Marienhof): Publicly owned municipal wastewater treatment utility of the City of Munich, with Gut Marienhof being one of Europe's largest WWTPs. Comparable to ProRheno in scale (~1.5 million PE), advanced treatment train (including ozone/PAK 4th stage), and integration with district heating and biogas.
• Emschergenossenschaft / Lippeverband: German public water management association operating multiple large WWTPs, sewer networks, and sludge incineration facilities in the Ruhr region. Comparable to ProRheno in its public-mandate structure, integrated wastewater/sludge/energy operations, and large-scale centralised treatment model.

Broad incumbents

• Veolia Water Technologies & Solutions: Global water and wastewater services arm of Veolia, offering municipal and industrial treatment, sludge management and water reuse across hundreds of sites. Relevant incumbent peer for benchmarking but operates as a commercial, multi-geography contract operator rather than a single public utility.
• SUEZ Water Technologies & Solutions: International water and wastewater treatment and services business, offering municipal concessions, industrial water treatment, and sludge handling. Broadly comparable in technology and service scope to ProRheno but commercial/private in ownership model.
• Xylem Water Solutions: Global water technology company supplying pumps, treatment systems, and digital monitoring for municipal and industrial water/wastewater operators. Adjacent incumbent providing much of the equipment stack that ProRheno and its peers rely on (SBR technology, filtration, analytics).
• Severn Trent plc: Large UK-listed regulated water and wastewater utility serving ~4.6 million customers. Comparable to ProRheno in regulated cost-recovery economics, large-scale treatment operations and growing focus on sludge-to-energy and renewable generation, though much larger in scale and publicly listed.

Others

• Hitachi Zosen Inova: Swiss-headquartered EPC contractor for anaerobic digestion, biogas upgrading and sludge-to-energy plants, with a strong European municipal reference base. Comparable technology supplier/partner for the kind of AD/biogas integration that ProRheno has just expanded with new digesters in 2026.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/prorheno

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Prorheno Ag