Our quality assurance procedure is also detailed.
Potential nutrient availability over first two years following application
|Dry matter 22.0% Nitrogen 4.5% Phosphate 4.7%|
|Biosolids liquid lime cake|
|Nitrogen 4.35% Phosphate 3.67% Neutralising value 5.4%|
|Lime equivalent 1.8t/ac||2t/ha|
Application rate of 25t/ha based on total of 250kg total N/ha
Southern Water incorporates Hazard Analysis Critical Control Point (HACCP) quality assurance systems within its treatment processes.
These systems ensure that the required bacterial standards for biosolid products are guaranteed.
The HACCP system was developed in the food industry to ensure that the required standards at each process stage are continually met.
In the UK the same HACCP approach has been adopted by the Water Industry for its treatment of raw sludges to treated biosolids.
Under this system limits are set for factors which are critical to maintaining end product quality.
These factors are defined as Critical Control Points (CCPs) under the HACCP system. By operating the treatment process within the CCP limits, the end product quality is assured.