BBR Enviro Systems’ W-Series was developed for treating odours in typical wastewater applications where the main pollutant is hydrogen sulphide. Other pollutants, occurring in lower concentrations, which are also removed by the system include:

• Other Total Reduced Sulphur (TRS) compounds including mercaptans, dimethyl sulphide, dimethyl disulphide
• A variety of Volatile Organic Compounds (VOC’s)
• Ammonia

The W- Series uses a two phase approach for the removal of pollutants:

Phase 1 – Ozone Scrubbing

• Soluble hydrogen sulphide (H₂S) is absorbed into the scrubber brine.
• Ozone is used as the oxidant. It is generated from air with no hazardous by products.
• Ozone is introduced into the solution where it oxidises the pollutants (H₂S, SO₂) to sulphates.

Phase 2 - Biofiltration

• VOC’s, Ammonia and TRS’s are oxidised by bacteria to form a harmless bio-sludge. The bio-sludge waste falls to the bottom of the filter and is drained away from the plant on a continuous basis.
• The media humidity is controlled to optimise phase transition of pollutants.

The W-Series is the smallest and most cost effective system available for its application. This is mainly because we combine two processes into one system, thereby targeting specific components more effectively:

• Ozone scrubbing is a highly efficient way of removing the soluble pollutants from an air stream.
• Our patented Fluidised-bed Biofilter has many times more active surface area per unit volume than the most efficient static bed biofilters.

Other advantages include:

• Reduced start up delays and downtime over biofiltration.
• The scrubber is a purely chemical process. There is no startup delay for removal (>99%) of hydrogen sulphide.
• No media replacement required.
• BBR media consists of inert PVC pellets, which provide a growing surface for the bacteria. It does not compact or decompose.
• There is no deterioration of the active biomass over time, because waste bio-sludge is removed from the media on a continuous basis.
• Handles peaks and variations better than biofiltration alone.
• The scrubber buffer solution absorbs the peaks and variations in the inlet hydrogen sulphide concentrations.

Other sources of hydrogen sulphide where the W-Series is effective include: petroleum refineries; unrefined petroleum product depots; natural gas plants; petrochemical plants; oil sands plants; pulp and paper plants that use the Kraft pulping process and stock feedlots.

Download W-Series datasheet (pdf)