CITADEL ENVIRONMENTAL SOLUTIONS HOLDING LIMITED

What CITADEL ENVIRONMENTAL SOLUTIONS HOLDING LIMITED does

Citadel Environmental Solutions Holding Limited is a privately held UK biotechnology company headquartered in Grittleton, Wiltshire, that develops and commercialises biological and electrochemical products for agriculture, livestock, disinfection, and renewable-energy markets. The company's core technology platform is the Biocat OSAA (Organic Surface Active Agents) range, which harnesses Archaea micro-organisms — including crenarchaeota and euryarchaeota strains sourced from land and marine environments and identified through 16S rDNA analysis — to enhance indigenous microbial metabolism in crop, livestock, and anaerobic-digestion applications. Specific formulations target horticulture (OSAA H), layer hens (OSAA L), pigs (OSAA P), and biogas production at anaerobic digestion plants (OSAA W), with documented field-trial outcomes including 20%+ yield uplift in horticulture, 4% higher egg production and 8% lower feed consumption in layer hens, and minimum 10% biogas production gains across 25 European AD plants.

The second technology pillar is Biocat+ Electron, a patented electro-oxygenated water (EOW) disinfectant produced via electrolysis of water and non-iodised kitchen salt, which disrupts pathogen cell membranes through a redox mechanism and is registered as a biocide under European Biocides standards. Citadel sells Biocat+ Electron alongside a proprietary hardware line — the BE 400, BE 600 BC, and BE 10000 dry-air fogging devices — either through outright sale or a rental model that pairs the equipment with recurring consumable biocide revenue. Distribution is direct and sales-led, with the company also acting as sole UK agent for the Steriplant N biocide line. The customer base spans agricultural operations, poultry farms, healthcare facilities, food processing, transport/hospitality venues, and AD plant operators across nine European countries.

Citadel operates with a small team (1–10 employees) from a single rural UK site, using a direct-to-customer sales model driven by phone and email enquiry rather than institutional sales infrastructure. Revenue is generated through product sales, hardware sales and rentals, and licensing arrangements with European AD plant operators. No external funding, M&A activity, or public-market exposure is disclosed, indicating a founder-controlled, capital-constrained commercial build-out focused on scaling proprietary product lines across adjacent agricultural, disinfection, and bioenergy verticals.

Name

CITADEL ENVIRONMENTAL SOLUTIONS HOLDING LIMITED

Legal name

Citadel Environmental Solutions

Website

https://citadel-biocat.com

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

1–10 employees

Short description

Citadel Environmental Solutions is a UK-based biotechnology company that develops Archaea-based bioactive biostimulants and electro-oxygenated water disinfection systems for agriculture, livestock, healthcare, transport, and anaerobic-digestion operators across Europe.

Ownership category

akta.pro rank

Product category

Agricultural Biotechnology and Environmental Solutions

NAICS

Surface Active Agent Manufacturing (325613), Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (3253), Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413)

SIC

Specialty Cleaning, Polishing And Sanitation Preparations (2842), Agricultural Chemicals (2870), Chemicals & Allied Products (2800)

akta.pro primary industry

Industrial Biocides & Preservatives (IMAEABAH)

akta.pro secondary industries

Biosecurity, Sanitation & Pest Control Services for Animal Facilities (AFAEALAI), Biochemicals & Bio-based Platform Chemicals (cellulose sugars, lignin derivatives, organic acids) (IMAMALAB)

Keywords

• Bioactive biostimulants
• Agricultural biotechnology
• Anaerobic digestion solutions
• Non-toxic disinfection
• Industrial bioremediation

Headquarters

HQ city

Coalville

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Marketing or Sales

Revenue model

1. Biocat+ Electron Biocide Sales: Sale of electro-oxygenated water biocide (Biocat+ Electron+) as consumable for fogging devices. Customers purchase biocide as ongoing consumable supply alongside device purchase or rental.
2. Fogging Device Sales and Rental: Sale and rental of fogging equipment (BE 400, BE 600 BC, BE 10000 models) with various capacity ranges from 50m3 to 10,000m3. Devices can be purchased outright or rented, with consumable biocide sold separately.
3. Biocat OSAA Agricultural Products: Sale of bioactive stimulant products (OSAA H for horticulture, OSAA L for layer hens, OSAA P for pigs) to agricultural operations for yield enhancement and animal health applications.
4. BioCat OSAA W Industrial Solutions: Licensing and product supply to operators of anaerobic digestion plants across Europe. Operational at 25 AD plants in Germany, Austria, Switzerland, Belgium, Finland, Slovenia, Netherlands, Czech Republic and UK.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Citadel Environmental Solutions develops and sells proprietary Archaea-based bioactive additives (Biocat OSAA range) for agriculture, horticulture, livestock (layer hens, pigs), anaerobic digestion / waste-to-energy, and industrial bioremediation. The company also markets the Biocat+ Electron electro-oxygenated water (EOW) biocide system, deployed through its own CE-certified dry-air fogging devices (BE 400, BE 600 BC, BE 10000) for non-toxic air and surface disinfection across healthcare, transport, hospitality, food processing, and agricultural facilities.

Product overview

Citadel Environmental Solutions offers a portfolio of biological and eco-friendly products centered on the OSAA (Organic Surface Active Agents) technology platform, which harnesses Archaea micro-organisms and electro-oxygenated water for agricultural, horticultural, and disinfection applications. The core offerings include Biocat OSAA L for poultry, Biocat OSAA H for horticulture, Biocat OSAA W for waste-to-energy and bioremediation, Biocat OSAA P for pigs, and Biocat+ Electron for non-toxic fogging disinfection. Supporting hardware products BE 400, BE 600 BC, and BE 10000 are fogging devices that disperse the Biocat+ Electron biocide solution for space disinfection.

Differentiator

Problem solved

Functional benefit

Brands

• Biocat OSAA: Range of bioactive additives harnessing Archaea micro-organisms for agriculture, waste-to-energy, and livestock applications including horticulture (OSAA H), layer hens (OSAA L), pigs (OSAA P), and waste-to-energy (OSAA W).
• Biocat+ Electron
• BioCat OSAA W

Products and services

• Biocat+ Electron Non-toxic electro-oxygenated water (EOW) biocide dispersed via dry air fogging for disinfection of air and surfaces, effective against pathogens including E. coli, Salmonella, Listeria, and COVID-19. Sold as a consumable alongside Citadel's BE series fogging devices; targets healthcare, food processing, transport, and agricultural facilities requiring non-toxic disinfection with no facility downtime.
• Biocat OSAA L Organic line cleaner and Archaea-based bioactive additive for layer hen water and feed systems, replacing hydrogen peroxide and producing healthier gut flora, reduced antibiotic use, and increased egg production. Demonstrated on 16,000-bird free-range flocks in Norfolk over a 2-year trial with +4% egg production and -8% feed consumption.
• Biocat OSAA H Bio-stimulant for horticulture that promotes natural biological control and enhancement mechanisms, delivering yields over 20% through root development, plant growth stimulation, and disease resistance, while increasing nutrient content (lycopene, beta-carotene, ascorbic acids). Targets horticultural crop producers seeking to reduce pesticide dependence and improve shelf life.
• Biocat OSAA W Natural bioactive additive containing micro-organisms, micro-nutrients, co-factors and phages that increases anaerobic biogas production by at least 10% at AD plants. Operational at 25 AD plants across Germany, Austria, Switzerland, Belgium, Finland, Slovenia, Netherlands, Czech Republic, and the United Kingdom; also deployed for industrial effluent and bioremediation applications.
• Biocat OSAA P Microbial bionutrition product for pigs used in water and feed systems to support gut health and production performance. Part of the OSAA livestock range alongside OSAA L (layer hens).
• BE 400 Fogging Device CE-certified, operated eco-friendly organic fogging device for air and surface disinfection of spaces from 50m3 to 400m3 using Biocat+ Electron EOW biocide. Features 2 automatic rotating nozzles and 100 pre-programmed functions; available for purchase or rental with consumable biocide sold separately.
• BE 600 BC Fogging Device Operated eco-friendly organic fogging device with built-in compressor for disinfection of spaces from 50m3 to 600m3 using Biocat+ Electron EOW biocide. Features 3 automatic rotating nozzles and 100 pre-set programmes; available for purchase or rental.
• BE 10000 Fogging Device Large-space fogging device with working range up to 10,000m3 for air and surface disinfection of transport, hospitality, industrial, and large-venue environments using Biocat+ Electron EOW biocide; available for purchase or rental.
• MORE (Cannabis and Hemp) Product enhancement solution extending the OSAA bioactive additive range into cannabis and hemp cultivation, supporting yield, growth, and crop quality outcomes for legal cannabis and hemp growers.

Quantifiable outcome

• 20%+ yield increase in horticulture applications
• +6 more outcomes

Named customers3 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Steriplant NcoreChannel Partner/ Reseller/ DistributorCITADEL ENVIRONMENTAL SOLUTIONS UK LTD (CES UK Ltd) is the sole UK agent for Steriplant N distribution. Steriplant N is a registered biocide product developed in Europe (Switzerland and Slovenia) with testing conducted through the Veterinary Faculty and Institute for Environmental Hygiene Ljubljana, Slovenia. This represents a core distribution partnership for the company's UK market presence.

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Novonesis (formerly Novozymes): Novonesis is a global biosolutions leader with enzyme and microbial products for agriculture, animal health and industrial processing, broadly comparable to Citadel's Archaea-based OSAA platform across food, feed and bioenergy.
• Alltech: Alltech provides microbial-based animal nutrition, crop science and fermentation solutions across livestock and agriculture, broadly overlapping with Citadel's OSAA L, OSAA P and OSAA H product lines.
• Ecolab: Ecolab is a global leader in sanitation, hygiene and infection-prevention solutions for healthcare, food processing and hospitality, broadly comparable to Citadel's Biocat+ Electron non-toxic disinfection offering.
• Chr. Hansen (now part of Novonesis): Chr. Hansen (merged into Novonesis) supplies microbial and fermentation-based products for animal health, plant health and industrial biotechnology, broadly overlapping Citadel's Archaea-based bioactive platform.

Direct peers

• Valagro (Syngenta Biologicals): Valagro (now part of Syngenta Biologicals) is a leading agricultural biostimulant and specialty plant nutrition company, directly comparable to Citadel's Biocat OSAA H horticulture product line.
• TOMI Environmental Solutions: TOMI provides SteraMist and other disinfection/decontamination technologies targeting healthcare, transport and large facilities, directly comparable to Citadel's Biocat+ Electron fogging-based disinfection system.
• Lallemand: Lallemand produces microbial-based animal nutrition, probiotic and biogas/anaerobic-digestion process-enhancement products, directly overlapping Citadel's OSAA L/P and OSAA W product lines in livestock and AD plants.
• Italpollina (Hello Nature): Italpollina/Hello Nature is an established agricultural biostimulants and specialty fertilizers producer, directly comparable to Citadel's OSAA H horticulture and crop-yield enhancement business.

Emerging players

• BioGaia: BioGaia develops probiotic and microbial solutions primarily for human and animal health, comparable as an emerging peer using microbial technologies for livestock and health-adjacent applications.

Regional players

• Schultz Biogas / innoVfoam: European-focused biogas process-enhancement and foam-control specialists serving anaerobic digestion operators, comparable to Citadel's OSAA W licensing business across German-speaking and broader EU AD markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UCsOxBybTWlHplK-qA4RUuYQ
• LinkedInlinkedin.com/company/citadel-environmental-solutions-uk-limited

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

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 CITADEL ENVIRONMENTAL SOLUTIONS HOLDING LIMITED