Bonus range of sewage / wastewater package treatment plants is suitable for populations from 55 – 100 and must be used with an existing primary settlement tank (PST) of suitable size and condition, or a new primary tank. Adding T-range models additionally to the existing PST.
PA treatment plants are suitable for a population or a population equivalent (PE) from 25 to 300 in a single tank, and a modular system for larger applications. The Biodigester PA treatment system is a three-stage biological process contained within a single tank structure, based on the principles of diffusers and designed in accordance with the requirements.
The HBAW Biodigester is part of the Biodigester range designed for efficient wastewater treatment in residential settings. Specifically, the HBAW series caters to households with 2 to 11 residents and is suitable for 'Shallow Dig' applications, making it ideal for areas where deep excavation isn't feasible. The 2-person Biodigester 'HBAW2' is also suitable for garden offices or workshops.
A 'Grease Trap' is essential where there is a communal kitchen, such as at pubs, hotels, some schools, nursing and care homes, and some leisure facilities. These must serve the kitchen drainage only and are normally fitted externally. 'Total Retention' refers to the need for the kitchen wastewater to be held in the grease trap for 24 hours at peak flow. This allows cooling and separation of fats, oils, and grease. The volume required depends on the type of establishment and the type of cooking. A typical figure is 15 litres per cooked meal.
Pumping systems are used for treated sewage effluent in preference to pumping untreated sewage.