Haigh Environmental is an established provider of specialist wastewater services in the UK, part of Haigh Group Ltd.

Haigh Environmental is headquartered in Ross-on-Wye, UK, The group employs around 120 people covering the whole of the United Kingdom, with satellite offices in Chesterfield, Oxford, Chepstow, London and Reading.

Haigh Environmental is your trusted partner for next-generation wastewater treatment solutions – from British-made wastewater screens, to the innovative FujiClean package treatment plants. Our focus is on standardised, easily-replicable and cost-effective solutions, which can be adapted according to customer requirements. We see our clients as partners, as we work together to prevent water pollution and protect the environment. From initial site surveys, through to designs, installation, full project delivery and ongoing maintenance, we are here every step of the way to help our clients and the environment.

The FujiClean technology is essentially a wastewater treatment works ‘in a box’ – and is the next generation of water treatment for rural communities of 250 households or less. 

The systems are manufactured by Japanese company FujiClean, one of the world’s leading manufacturers of residential and commercial wastewater treatment solutions. 

It uses electro-coagulation to achieve phosphorus levels that meet environmental consent limits, as well as other key limits for ammonia, BOD and suspended solids/total nitrogen. 

There are two models of FujiClean: 

• The CEN for BOD, suspended solids, ammonia & total nitrogen, which consists of 1 Primary Settlement Tank, 1 anaerobic chamber, 1 aerobic and clarification chamber. 

• The CRX for BOD, suspended solids, ammonia, total nitrogen and crucially, chemical-free phosphorous removal, by electrocoagulation technology, 2 anaerobic chambers,1 MBBR/aerobic chamber and clarification chambers. There are two CRX models – CRX and CRXII. 

The anaerobic zones ensure sludge settlement and denitrification, while the aerobic zones establish an oxidised environment for nitrification and BOD removal. 

The FujiClean is different to standard electrocoagulation systems, as it combines the technology within an aerated zone to increase dissolved oxygen (DO) in the effluent, supporting oxidation of dissolved metals. Within an oxidised environment, it can form stronger, more voluminous flocculations, which improve coagulation and sedimentation. The systems also have sludge re-circulation and backwash features, which ensure residual iron can be returned to the primary chamber for removal during desludging. 

FujiClean has a strong presence in Japan, the USA, Australia and across Europe, with a track record of success across key metrics. While this is relatively new technology in the UK context, it is tried, tested and standard elsewhere in the world.

HEC have installed more than 200 FujiClean plants across the UK, including in sensitive habitats such as the Lake District and high-profile locations such as Chatsworth House. HEC has ongoing projects with United Utilities, Yorkshire Water, several large hotels and campsites, as well as many private homeowners across the UK.

The FujiClean systems supplied by HEC are manufactured in Japan and Germany.

These can vary depending on the exact project specification, but generally, the smaller units are on a 1–2-month lead time, while for the larger units, a lead time of 4 to 6 months should be planned for. As the official UK distributor of FujiClean units, we aim to keep a reasonable stock at our head offices in Herefordshire, for rapid deployment nationwide.

The latest AMP8 investment cycle is the most ambitious yet, with targets to improve the resilience and sustainability of the water sector, and address challenges including getting the sector to net-zero, improving water quality, reducing leakages, and overhauling wastewater management.

The FujiClean systems are well-positioned to help water companies and contractors deliver on AMP8 targets around sustainability, standardisation, phosphorus removal and more:

• Environmentally friendly – deploying a FujiClean means that no chemicals are released into waterways, as opposed to the current widely-deployed chemical dosing systems. 

• Standardisation – the FujiClean goes above and beyond the usual asset standards like SAF and chemical dosing. However, most importantly, HEC is creating standardised ranges of products to suit a broad range of site specifics for flows, loads and permit details. This approach increases efficiencies, replicability and reduces costs.

• Innovation – The FujiClean is an innovative technology from Japan originally developed to combat high nitrogen and phosphorus levels for domestic & small commercial sites. Now, Haigh Environmental is working with water companies and FujiClean HQ in Japan to strengthen its capabilities to serve larger residential, commercial and municipal sites, while still meeting strict permit requirements.

• Cost–effective – with standard templated designs for above and below ground, and partially buried plants, HEC can deploy multiple installations for the price of one standard solution.

With no requirement for chemical dosing, the FujiClean systems are more sustainable, easier to maintain and require fewer inputs than other systems. Additionally, some systems can even run off solar or wind power, significantly reducing the carbon footprint of wastewater management for small rural communities. For CEN systems, the desludge intervals for residential and holiday let sites can be extended to 3-5 years, significantly reducing tankering requirements, compared to alternative package treatment plants.

The available data from UK trials and live site installations shows that FujiClean CEN and CRX models are performing well above the minimum requirements set by the Environment Agency (EA) for small treatment systems.

Effluent Quality:

• EA Standard Consent Limits: 20 mg/L BOD, 30 mg/L Suspended Solids (SS), 20 mg/L Ammonia.
• CEN Systems:
  • ~2 mg/L BOD
  • ~3 mg/L SS
  • ~2 mg/L Ammonia
  • <10 mg/L Total Nitrogen
• CRX Systems (Live Site Trials):
  • <1 mg/L Total Phosphorus
  • ~10 mg/L BOD
  • ~10 mg/L SS
  • ~10 mg/L Ammonia
  • ~10 mg/L Total Nitrogen

These results indicate strong nutrient removal performance, especially in comparison to EA consent standards, suggesting suitability for sensitive environments (e.g. phosphorus-limited catchments). Acutal results will depend on the flows and loads of a particular site as well as associated process and controls in place.

Structural and Component Durability:

• 25-year structural guarantee and 50-year design life.
• FujiMAC air compressors come with 2 year warranty as standard and can be extended to 5 years.
• FujiMAC blowers require minimal maintenance, with only a couple of diaphragm replacements over 5 years — well below industry average.

Power Consumption:

• For the largest unit (CRX50): 21 kWh/day, equating to approx. 0.12 kWh/PE/day — very efficient for advanced treatment systems on a like for like basis.

Servicing and Maintenance:

• Servicing intervals: 3 to 12 months, depending on unit size and site flows and loads.
• Low-maintenance design:
  • Sludge level checked via sludge judge.
  • Filter changes in air blower.
  • CRX units require periodic check of plate wear.

This indicates low operational input and low lifecycle cost, which is attractive for both domestic and small commercial applications.

Operational Resilience:

• Feedback from UK installations highlights that the systems cope extremely well with both underloading and overloading, a key concern in domestic and variable flow scenarios, such as municipal wastewater works and holiday parks.

FujiClean units can be installed above or below ground, with temporary rental options available alongside permanent installations. Installation logistics are similar to traditional septic tanks and packaged sewage treatment systems, and systems can be up and running within days. All systems come with a full installation manual and specialist training is available.

Standard maintenance for FujiClean systems includes service of the blowers, change of filters, and a desludge of the tank. On medium and large sites, the servicing/desludging intervals will be 3-6 months, while on smaller domestic sites, the intervals will be 6-12 months. With the CEN units on small residential and holiday let sites, the desludging period can be as long as 5 years. 

All models have provision for a sample to be taken from the clarification chamber. Monitoring requirements will be site-specific, however we recommend also having a dedicated sampling point after the final effluent. There are options available with the blowers/control unit for monitoring purposes, and telemetry alarm systems can be added if required.

Haigh Environmental supplies high-quality, British-made inlet screens and screenings handling equipment, used in wastewater treatment plants to filter out solid wastes.

Alongside our core ACE Screener and ACE Bandscreen products, we also offer a comprehensive range of ancillary equipment, from grit removal to steel gantries, support structures and control systems. 

Haigh Screens are 6mm 2D as standard in line with WIMES, with the option of 5mm or 3mm where process requirements might need additional solids removals, for example prior to membrane treatment systems.

The Haigh ACE Screener range can process flowrates upto 80 l/sec on a Duty only Basis, with the ACE Bandscreen dealing process flow rates upto 200 l/sec on a Duty only Basis. This corresponds to sites serving populations up to 15,000. Haigh screens can be configured in a modular fashion to address sites with higher flows. 

All Haigh screens have the option of an integrated bypass, storm flow management and coarse screening options

Both screens require zero wash water, as water is taken directly into the unit from the channel for washing purposes. We provide the cleanest screenings in the industry, while saving energy and overall treatment capacity, especially in small works.

The ACE Screen range would typically require a power requirement of 25 -32 AMP 3 Phase and Neutral supply, but has a very low real-time installed power consumption due to the operating control sequence that minimises the running time of each system. The drives on the sreening systems are typically operating for a small percentage of the day, dependent on flows and loads

All Haigh Screens are all built at the Haigh Group Ltd headquarters in Ross-on-Wye, UK.

The Haigh Screening systems are well-positioned to help water companies and contractors deliver on AMP8 targets around sustainability, standardisation and more:

• Environmentally friendly – deploying a Haigh Screening System means that more  rags, plastics, wet wipes etc are removed from the wastewater streams, while using Zero Wash Water, as well as reducing landfill demands and carbon emissions. 

• Standardisation – HEC have creating standardised ranges of products to suit a broad range of site specifics for flows, loads and site constraints. This approach increases efficiencies, replicability and reduces costs and waste.

• Innovation – The Haigh Screen range is constantly under review and looking for improvements and requirements to bring to the industry.  Our philosophy is to deliver our products, support them, listen and learn from our customers, then improve and innovate.

• Cost-effective – with standard templated designs for across our product range for channel mounted or flat concrete or structural plinth prefabricated inlets, we can configure our offering to meet site and client requirements.

These can vary depending on the exact project specification and complexity,  however in general, the Screener range has a 3-4 month lead time.

Basic checks to prevent undue noise and movement are required for everyday maintenance. Routine monthly and annual maintenance activity are detailed in the manual.

There are over 1500 Haigh screens installed with strong current demand.

Haigh’s screens address the mechanical removal of rags and plastic, while keeping biological matter in the flow. The biological treatment from the FujiClean units are great at sites serving up to 250 households, so not only well-matched from a sizing perspective but also performance, ease of deployment and low ongoing energy requirements.

Yes, Haigh operate a fleet of ACE Screens and FujiClean systems, which can be brought to site on a temporary basis, up and running in days to deliver mechanical and biological treatment.

The Haigh Environmental design team can help you plan and design your process, as well as the associated assets and deliverables that you might need from hydraulic modelling control systems, through to ground working, project delivery and system commissioning, based on your specific requirements. The team can also help if any tertiary treatment is required to achieve particularly tight effluent quality standards.