Posted by Callum Vallance-Poole, on November 28, 2024.
Choosing the right sewage treatment system is a critical decision for homeowners, self-builders, and contractors alike. The system you select can significantly impact costs, performance, and ongoing maintenance. In this blog post, we’ll provide a detailed comparison of the GRAF UK One2Clean and the Marsh Ensign to help you make an informed decision. While we represent GRAF UK and believe in the superiority of our products, we’ll strive to maintain a balanced, unbiased perspective, offering insights that benefit you as a customer.
Technology
GRAF UK One2Clean employs a state-of-the-art sequencing batch reactor (SBR) technology with an innovative three-phase treatment process. This design ensures efficient wastewater treatment with minimal energy consumption and significantly reduces the need for moving mechanical components inside the tank. Fewer moving parts mean less maintenance and a lower likelihood of breakdowns, providing peace of mind to homeowners.
Marsh Ensign, on the other hand, uses a traditional aeration system with bio media. This method is reliable and widely recognised, with proven performance in achieving required treatment standards. However, the presence of media and moving parts increases the chances of wear and tear over time, potentially resulting in higher maintenance costs. Plus, if the media escapes the tank they will need to be replaced and cause environmental issues when discharged from the tank.
Verdict: If you prioritise simplicity, energy efficiency, and low maintenance, the One2Clean stands out. However, the Ensign’s long-established technology may appeal to those who prefer a more traditional approach.
Performance and Effluent Quality
The One2Clean boasts exceptional effluent quality, achieving industry-leading results with ammonia levels as low as 0.5 mg/l. This makes it particularly well-suited for areas with strict nutrient neutrality requirements or environmentally sensitive locations. Its high treatment performance ensures compliance with even the most stringent regulations.
- BOD (Biological Oxygen Demand): 7 mg/l
- SS (Suspended Solids): 14 mg/l
- NH4-N (Ammonium): 0.5 mg/l
- NTot (Nitrogen): 7.9 mg/l
- PTot (Phosphate): 1.6 mg/l
The Marsh Ensign delivers solid performance, achieving the effluent quality required to meet UK environmental standards. However, its ammonia and nitrogen treatment levels are generally less effective compared to the One2Clean. This may limit its suitability for projects where ultra-high effluent quality is a necessity.
- BOD (Biological Oxygen Demand): 11.5 mg/l
- SS (Suspended Solids): 19.2 mg/l
- NH4-N (Ammonium): 8.4 mg/l
- NTot (Nitrogen): Not specified
- PTot (Phosphate): 5.7 mg/l
Verdict: For superior effluent quality and compliance with nutrient neutrality requirements, the One2Clean is the clear winner. The Ensign still performs well for standard installations but falls short in more demanding scenarios.
Ease of Installation
The One2Clean is designed with ease of installation in mind. It requires only a gravel base and backfill, eliminating the need for expensive concrete works. This not only reduces installation costs but also minimises environmental impact.
The Marsh Ensign, while not overly complicated to install, typically requires a more robust foundation, often involving concrete. This can add time and expense to the installation process, particularly on challenging sites.
Verdict: The One2Clean’s simpler installation process is both cost-effective and environmentally friendly, giving it an edge over the Marsh Ensign.
Maintenance and Durability
With no moving mechanical parts inside the tank, the One2Clean requires minimal maintenance. The simplicity of its design reduces the likelihood of component failure, translating into lower long-term maintenance costs.
The Marsh Ensign, by contrast, relies on aeration equipment and moving parts within the system. These components may require periodic servicing and replacement, increasing maintenance requirements over time.
Verdict: The One2Clean is a better choice for those seeking a low-maintenance, hassle-free system. However, the Ensign’s robust design and proven track record still make it a reliable option.
Pricing
The upfront cost of the One2Clean is competitive, particularly when you factor in the built-in features such as the integrated sampling chamber and free commissioning service provided by GRAF UK. These features reduce additional costs for homeowners and self-builders.
The Marsh Ensign is a low cost option, but additional components like separate sampling chambers and commissioning fees may increase overall costs. Depending on your specific project requirements, these extras could impact your budget.
Verdict: The One2Clean offers better value for money due to its included features and free commissioning service.
Environmental Impact
The One2Clean is engineered with sustainability in mind, using energy-efficient technology and eco-friendly installation practices. Its reduced power consumption and lack of concrete requirements contribute to a lower carbon footprint. Plus the tanks are manufactured from 100% recycled plastic.
The Marsh Ensign, while reliable, consumes more energy and may have a higher environmental impact due to the need for concrete installation bases.
Verdict: If environmental sustainability is a key consideration, the One2Clean’s eco-friendly design is a standout feature.
Summary: Which System Is Right for You?
Both the GRAF UK One2Clean and the Marsh Ensign are excellent sewage treatment systems with their own strengths. If you’re looking for a low-maintenance, energy-efficient solution with exceptional effluent quality and eco-friendly features, the One2Clean is an excellent choice. However, the Marsh Ensign may appeal to those who prefer traditional, well-established technology and don’t mind slightly higher maintenance needs.
Call to Action: To learn more about the GRAF UK One2Clean and how it can meet your sewage treatment needs, visit our product page or contact our team today for expert advice. For a detailed consultation or free quote, get in touch now!