Forbes process design is accomplished with the company’s own dedicated suite of software backed by substantial resources of knowledge and experience.
A design life of 20 years is achieved by the use of high quality plastics throughout the construction. Provided that water and air supplies are free from solid impurities, Forbes’ Stripping Towers normally require no maintenance other than regular external inspection. Where practical, fans are sited at low level for ease of inspection and access to filters, if fitted.
Removal levels down to parts per million (PPM), or even parts per billion (PPB), depending on contaminant.
Relatively high levels of many organic contaminants can be reduced to well below WHO target levels by the stripping process which employs specially designed packed columns with new high-efficiency packing systems.
VOCs commonly found include halogenated hydro-carbons and aromatic compounds such as:
Many of these have been identified as carcinogens and regulations now restrict their presence in potable water supplies to ‘no discernable traces’.
Air stripping is a highly cost-effective alternative to adsorption.
Activated carbon adsorption is a well established process to counter VOC contamination but the carbon is expensive and may need frequent regeneration.