Biological wastewater treatment
Many municipal wastewater treatment works face challenges related to meeting stricter discharge criteria and insufficient capacity, but limited space for expansion, whilst keeping costs down. Others are looking into water reclamation for the benefit of the local community. Alfa Laval offers innovative, flexible, and highly efficient biological wastewater treatment technologies backed by decades of experience, enabling sustainable, energy-efficient solutions tailored to influent customers' needs.
Biological wastewater treatment process with Alfa Laval
- High efficiency lowers operating costs and top-notch effluent quality with minimal energy use
- Flexible to adapt to varying flows and load
- Small footprint, fitting easily into any facilities, even if it's space-constraint
- Adapted to any type of wastewater, weather it is municipal or industrial
- Designed with the best TCO in mind
Alfa Laval technologies for biological wastewater treatment processes are ideal for removing nutrients, organic matter, fats, oils, and grease (FOG), as well as other undesirable micro particles and substances.
Where influent flow and organic loads vary and effluent requirements are stringent, the AS-H Sequencing Batch Reactor(SBR) with our patented floating decanter is a good choice for secondary biological treatment. Combine it with the Alfa Laval AS-H Iso-Disc® Cloth Media Filter for tertiary treatment to get effluent of water reuse quality (5-10 µm) and <5 mg/l suspended solids and <10 mg/l BOD at a rate of 10-15 m3/h/m2.
Alternatively, install the all-in-one Membrane bioreactor (MBR) system, which combines secondary and tertiary wastewater treatment and delivers a superior effluent quality (effective filtration in sludge to 0.2 µm) suitable for reuse. It removes suspended solids down to <1 mg/L, BOD down to <5 mg/L, and handles 5-40 liter/h/m2 filtration area. The gravity-driven, pump-free, and energy-efficient design with compact membrane filtration modules (MFM) is based on our patented hollow sheet technology. Compared to other MBR solutions, it offers reliability, simplicity of operation, plus low maintenance costs.
Wastewater - an untapped water resource
More and more realise that wastewater can also be a valuable water resource. There are many good reasons to consider reusing biologically treated municipal and industrial wastewater: Increase water resources, reduce intake of new water and limit effluent flow loads to sewers.
Reclaimed water can be used for numerous applications e.g. industrial process water, cooling towers and wash water; surface irrigation of crops, vineyards and golf courses; recreation lakes, wetlands, wildlife habitat and stream augmentation and ground water recharge.
Water treated with Alfa Laval MBR and AS-H Iso-Disc filtration systems can even be used as potable water if a final polishing step e.g. UV radiation, ultrafiltration, nanofiltration, reverse osmosis, active coal, ozone or chlor is added.
