Eco-sensitive phosphate, ammonia and nitrate reduction for nutrient neutral sites
Designed to reduce Phosphate, Ammonia and Nitrates in environmentally sensitive areas, the Marsh Aqua-Puratine system surpasses standards required by Natural England and environmental regulators.
Supplied as a complete system, combining the EL and G-APS units, the Marsh Aqua-Puratine is available in capacities catering to sites for up to 50 people. The Aqua-Puratine-G-APS (Intelligent Controlled Dosing System) can be integrated with any sewage treatment plant to enhance effluent discharge quality.
Enabling nutrient neutral development in environmentally sensitive areas
Combined effluent standards of TNb 18mg/l, Ptot 0.9mg/l
Extremely low or undetectable chemical residuals in discharge
(below 0.0139% of total 24hr processing of the effluent)
How does it work?
Marsh’s innovative nutrient removal technology combines the Aqua-Puratine:EL and Aqua-Puratine-G-APS systems, revolutionising wastewater treatment. This integrated approach effectively reduces pollutants and nutrients, ensuring compliance with stringent environmental standards.
The Aqua-Puratine:EL sewage treatment plant employs a multi-stage process. It initiates with primary settlement, allowing solid particles to settle out. Subsequently, aerobic biological treatment occurs in two biozones filled with specialised biofilm support media. This unique media ensures highly efficient nitrification, reducing ammonia concentrations to a mere 1 mg/l in the final effluent. Additionally, simultaneous nitrification and denitrification processes reduce nitrate levels. This system holds accreditation to EN12566-3 Annex B for systems of up to 50 Population Equivalent (PE) and complies with the UK Forward for BSEN12566-3, demonstrating its reliability and effectiveness.
Complementing this, the Aqua-Puratine-G-APS introduces controlled chemical dosing for phosphate removal in off-mains sewage treatment plants. It’s designed to match chemical infusion precisely with influent phosphate loads, preventing wasteful overdosing. The Aqua-Puratine-G-APS features two chambers for efficient phosphorus removal and biosolids settling.
The key to the system’s performance lies in its control and automation. Marsh Controls and Marsh Alarms utilise high-quality aeration and dosing timers, ensuring accurate chemical dosing. Monitoring the pumped outlet from the preceding sewage treatment plant guarantees chemicals are dosed appropriately. In instances of gravity discharge, an intermediate pump chamber ensures precise dosing, even when homeowners are absent.
This innovative approach stands out from continuous dosing systems, which can lead to increased metal concentrations in effluent. The Aqua-Puratine-G-APS adapts dosing based on inflow, ensuring safety for children, wildlife, and the environment. Moreover, it’s energy-efficient, consuming only 1 kWh per day.
In summary, Marsh’s nutrient removal technology offers an environmentally friendly solution for wastewater treatment, reducing pollutants and nutrients effectively while adhering to strict regulatory standards.
