Envirosafe
Advanced Sewage Treatment Systems
The requirement for a more flexible plant has led to the development of Envirosafe – a wholly new range of sewage treatment plant to meet the demands of today’s consumer.
We have drawn on over 40 years all over the Europe of expertise in treatment plant technology in order to meet our own strict criteria in the development of the Envirosafe plant:
• High and medium rate performance options across a range of influent and effluent qualities
• Adaptable to specific consent requirements including ‘Total Nitrogen’
• Low head loss
• Minimal footprint area
• Single piece tank for rapid installation and reduced costs
• Variable invert options
• Minimal visual impact (below ground)
• Low running costs
• May be installed in trafficked areas (subject to loading)
• Compliant with PN-EN-12255
• Low maintenance
• Alarm protected
Envirosafe sewage treatment plants employ a plug flow combination of aerobic and anoxic 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.
This 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. Envirosafe 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. Standard Envirosafe models utilise two aerobic treatment chambers for lower performance applications. Where higher effluent standards are required, the HEQ models employ a third anoxic zone.
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. Total nitrogen consents can be achieved with HEQ models.
