AS-H sequencing batch reactor
The Alfa Laval ASH Sequencing Batch Reactor (SBR) is an advanced technology for efficient biological treatment of a wide range of wastewater types and flow rates, using the sequential batch reactor process with activated sludge. Ideal for varying flows and stringent effluent standards, it combines a patented floating decanter, flexible technology options and compact design to deliver reliable sequencing batch reactor wastewater treatment even in plants with challenging footprint limitations.
Experience the all-in-one sequencing batch reactor solution for municipal and industrial wastewater treatment
- Simple robust design where all biological wastewater treatment process steps occur in the same tank
- Integrating all key stages—anaerobic, anoxic, aerobic and sedimentation—into one reactor maximizes efficiency, reduces footprint and reduces cost
- Ideal for municipal and industrial wastewater requiring consistent effluent quality under variable flows and loads
- Advanced automation and process control simplify operations, requiring less manpower
- Easy to retrofit into existing plants and earthen lagoons, or available in a package plant configuration
Benefits of SBR wastewater treatment for variable flows and loads
The sequential batch reactor process is suitable for treating all types of biodegradable wastewater, removing biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), as well as essential nutrients like nitrogen and phosphorus. It provides optimized control of the SBR wastewater treatment process with advanced automation and flexibility. Unlike conventional systems, this sequencing batch reactor solution integrates all activated sludge functions into a single reactor, eliminating the need for separate basins for anaerobic, anoxic, cyclic aerobic, and sedimentation stages.
Especially suited for applications where influent flow and organic loads vary and effluent requirements are stringent, this all-in-one solution of sequencing batch reactors comes complete with floating decanters, blowers, a diffused aeration system, mixers, waste sludge pumps, motorized influent and air control valves, plus full instrumentation and a process control center. Engineered for flexibility, it fits numerous basin geometries and is ideal for both new installations and retrofits of existing basins or lagoons.
How it works
Complete package with flexible design
The Alfa Laval AS-H sequencing batch reactor brings together the key elements of advanced activated sludge technology including anaerobic, anoxic, cyclic aerobic, and sedimentation processes into a single reactor. A variety of materials and configurations are available, such as shop-fabricated rectangular designs or larger field erected circular designs. Alternatively, an existing tank may be retrofit to accommodate the process.
Patented Floating Decanter
At the core of the Alfa Laval AS-H SBR, is the floating decanter. There are several key features of this device that differentiate it from other solutions including:
- Adjustable V-notch weir to ensure precise decanting and minimize sludge disturbance
- Severe duty motors
- No underwater seals or valves
- Constant rate decanting
- Can be anchored anywhere within the aeration basin
The Alfa Laval AS-H floating decanter can also be purchased as a stand-alone product.
Flexible Process Control System
An expertly designed control system ensures optimum operation of your activated sludge SBR. Flexible options can range from:
- Flow proportional or Time-Based control
- True batch or Continuous Fill process
- User-friendly HMI, PLC, or a plant-wide SCADA system
Owners receive extensive training and ongoing support for their Alfa Laval AS-H SBR system.
