Our Expertise

Graf and phosphate removal

We at Graf UK are pleased to be able to offer wastewater systems that are capable of eliminating excess nutrients, in particular phosphates and nitrates, from wastewater. This action helps the system contribute significantly towards the goal of achieving nutritional neutrality. Eutrophication can be caused by an excess of nutrients, which can result in hazardous algal blooms and low oxygen levels, and can have a severe impact on aquatic habitats and the fauna that resides inside them.

We have been supplying systems that are used for this purpose in Europe, especially in England, Scotland, and Wales, for over 15 years now. Our Graf sewage system has been built to remove these excess nutrients from wastewater, and we have been doing so for over 15 years, here at Graf UK. We have a great deal of experience in this field, having provided over 5000 different systems throughout this time period.

It is possible for our One2Clean Biological system to achieve an efficiency of 87.0% for the removal of total nitrate, which results in an effluent that contains just 7.9mg/l of nitrate. With some minor software tweaking, the One2Clean Biological system is capable of achieving an efficiency of 80.20% for the removal of total phosphate, which results in an effluent that contains just 1.6 mg/l of phosphate. In addition, the phosphate removal capability of our One2Clean +P system has been optimised by the incorporation of a dosing package that contains a precipitant, such as ferric chloride or PAC, to improve the system's overall performance in this regard. This system has the potential to achieve an amazing 95.1% efficiency for the removal of total phosphate, which will result in an effluent that contains only 0.4mg/l of phosphate.

Our sewage system is able to contribute to the pursuit of nutrient neutrality and to the mitigation of the damaging effects of nutrient pollution on the surrounding ecosystem by eliminating excess nutrients from wastewater. In addition, we are in the process of developing a national network of accredited service providers. These providers will be able to offer a variety of services, such as installation, commissioning, as well as service and maintenance contractors, which will ensure that our systems are installed and maintained correctly in order to achieve optimal nutrient removal performance.

In general, our sewage system is both a cost-effective and efficient method for establishing nutritional neutrality in water bodies. This is due to the fact that it processes nearly all of the water that is collected. Graf UK is able to assist organisations in meeting regulatory standards and protecting the health as well as the long-term viability of aquatic ecosystems because to our extensive experience in the supply and installation of nutrient removal systems.

Graf's methodology for nitrate removal

Graf UK is proud to offer One2Clean wastewater treatment systems, which are renowned for their exceptional nutrient removal capabilities. In particular, the +D package has been proven to be especially effective at removing total nitrogen from wastewater, achieving an impressive 86.5% TN removal efficiency with an effluent TN concentration of only 9 mg/L.

The key to the effectiveness of the +D package lies in its ability to adapt program settings to treatment targets. This allows for optimal conditions for nitrifying bacteria to thrive, creating an environment where they can effectively convert nitrogenous compounds into less harmful forms. The intense aeration in the system is carefully managed to create an ideal environment for nitrifying bacteria, with dissolved oxygen (DO) levels maintained at 2 mg/L or higher. This ensures that the bacteria have the oxygen they need to carry out their important work.

In addition to the intense aeration, the +D package also employs short aeration periods with targeted pauses for denitrification. This creates low oxygen conditions that allow for denitrification to occur, effectively removing excess nitrogen from the wastewater. By utilizing advanced aeration and denitrification techniques, the +D package is able to achieve impressive TN removal rates, helping organizations to achieve nutrient neutrality in their wastewater treatment.

Another important feature of the +D package is its mixing system, which keeps sludge in suspension. This ensures that the sludge remains in contact with the nitrifying bacteria, maximizing the efficiency of the system and ensuring effective removal of nitrogenous compounds from the wastewater.

Effective Solutions for Achieving Nutrient Neutrality Standards

In conclusion, Graf UK has been offering wastewater treatment systems that are capable of removing excess nutrients from wastewater for over 15 years. Our One2Clean +D system and One2Clean +P system have both proven to be highly effective at removing total nitrate and total phosphate respectively, ensuring that the effluent meets nutrient neutrality standards. Our systems are designed to eliminate excess nutrients from wastewater, which is crucial in reducing the negative impact of nutrient pollution on the environment. We are also committed to providing excellent service through our accredited network of service providers, who offer installation, commissioning, and maintenance services to ensure optimal system performance.