Anaerobic and aerobic digestion are naturally occurring processes that are harnessed to treat waste, produce biogas, provide heat and produce soil improving material (compost).
These digesters are commonly used for sewage, municipal wastewater or industrial wastewater treatment. They aid in upgrading the quality of effluent being released into the environment and are a major component in water recycling from high organic load wastewater.
Veolia Water Technologies offers a wealth of knowledge and expertise in all aspects of water treatment activities, making Veolia a world leader in its field. Encompassing various specialist companies that focus on specific processes for certain applications, Veolia also offers a host of treatment technologies.
Veolia's biological processes address the needs of a cross section of industries for biological treatment solutions.
Veolia's aerobic and anaerobic biological processes include:
This process uses BAF (biological aerated filter) for the removal of carbon, nitrification, denitrification and post denitrification in municipal and industrial wastewater applications.
- Advanced technology
- Intelligent, compact design
- Highly efficient
- Easy to install
Moving Bed Biofilm Reactor (MBBR)
Moving Bed Biofilm Reactor (MBBR) technology offered by Veolia is based on the biofilm principle and uses the advantages of activated sludge and other biofilm systems with none of the disadvantages. Biofilm elements are manufactured from polyethylene and are used for organics removal, nitrification, denitrification and detoxification.
- Compact & robust
- Flexible reactor design
- Ideal for upgrades or new plants
- Easy to operate & control
- No clogging
- No sludge return
- Food & dairy
- Pulp & paper
- Distilling & brewing
- Oil refineries
This technology is offered by Biothane, a world specialist in aerobic and anaerobic biological treatment of wastewater and part of the Veolia group. Biothane UASB uses an up flow anaerobic sludge blanket (UASB) and patented double baffle plate three-phase separator to treat different kinds of wastewater.
- More than 20 years’ experience
- High volumetric loading rate
- Compact reactor footprint
- Stable production
- Economic operation
- Low sludge production
- Major reduction BOD
- Food & beverage
- Pulp & paper
BIOSEP Membrane Bioreactors
Veolia Water Technologies South Africa uses the innovative, patented BIOSEP process, developed by its parent company Veolia. BIOSEP is a high performance solution that combines aerobic biological treatment using activated sludge and membrane filtration for the treatment of municipal and industrial effluent. The filtration step can use immersed membranes or external, pressurised membrane filtration. The process ensures a high reduction of carbon, nitrogen and phosphorus pollution, as well as exceptional bacterial removal. BIOSEP combines an aeration tank and a membrane system where the membranes are grouped into modules. After treatment, such as screening, raw water enters the aeration tank where carbon, nitrogen and phosphorus are removed.
Membrane filtration then separates the purified water from the activated sludge. Submerged membranes typically deployed in capillary configuration and positioned vertically, with filtrate being drawn through the membranes under slight vacuum. Pressurised membranes, on the other hand, operate on a cross-flow principle. The treated water is pumped out and excess sludge is directly removed from the tank for dewatering.
Benefits over conventional activated sludge:
- Exceptional treated water quality
- Highly compact system
- No final clarification
- High COD removal
- Reduced reagent levels in phosphorus elimination
- Thickener may also be removed
- Reduced sludge production
The BIOSEP immersed membrane bioreactor is compact in design and environmentally safe, offers reliable biological treatment and delivers high quality, treated effluent. It has the potential to help Veolia to gain increased market share in the biological treatment of domestic sewage and industrial effluents and will aid the companies in upgrading wastewater for re-use thus bringing long term benefits to the environment.