The range is characterised by these key features:
• High-rate performance across a range of influent and effluent qualities.
• Low head loss.
• Minimal footprint area
• Single-piece tank for rapid installation and reduced costs.
• Variable invert options.
• Minimal visual impact (below-ground installation).
• Low running costs, low maintenance.
• May be installed in trafficked areas (subject to loading).
Biotec^™ 5-7 plants feature a control panel, weatherproof to IP66, that can be externally mounted. It enables pre-programmed plant control with alarm/fault log, automatic re-start after power failure, integrated level protection, and visual and audible alarm indicators.
The Biotec^™ 5-7 range of sewage treatment plants employ a plug flow combination of aerobic processes in a fluidised bed arrangement. This operates in conjunction with an advanced system of air diffusers and selected media to deliver optimum levels of purification. The process takes place in three distinct stages:
1. Primary settlement
This is the initial stage of treatment and simply involves the retention of coarse solids present in raw sewage and wastewater for subsequent gradual breakdown. The Biotec^™ 5-7 range features two chambers to ensure efficient operation with a flow balancing facility.
2. Biological treatment
Substantial BOD reduction takes place here, where the carbonaceous pollutants are removed by presenting the sewage to the micro-organisms in the presence of oxygen. The treatment is achieved by high-efficiency air diffusers continually pumping oxygen through the biological media and fluidised effluent. Biotec^™ models use two aerobic treatment chambers for standard performance applications.
3. Settlement
A natural by-product of biological treatment is humus sludge and this is separated for further treatment. The treated effluent is discharged via the outlet. In standard configuration The Biotec^™ 5-7 range will deliver a treatment better than 20mg/l BOD, 30mg/l SS, with ammonia levels better than 20mg/l depending on the application.