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 people realize that wastewater can also be a valuable resource. There are many good reasons to consider reusing biologically treated municipal and industrial wastewater: Reuse water resources, reduce freshwater intake, and reduce effluent treatment costs.
Reclaimed water can be used for numerous applications, e.g., industrial process water, cooling towers, wash water, surface irrigation of crops, vineyards, and golf courses; recreation lakes, wetlands, wildlife habitat, and groundwater recharge.
Water treated with Alfa Laval MBR or an AS-H Iso-Disc filtration system is an excellent technology for indirect portable reuse (IPR) or direct potable reuse (DPR) when a final polishing technology such as UV disinfection, ultrafiltration, nanofiltration, reverse osmosis, activated carbon, ozonatione, or chlorination
