AGS - Aerobic Granular Sludge Technology
AGS - Aerobic Granular
Sludge technology is an innovative biological treatment technology
with enhanced sludge settlability, nitrogen and phosphosrous
nutrient removal, less energy consumption compared to other
SBR - Sequencing Batch
Reactor technology and Activated Sludge Process.
AGS technology can be considered as SBR 2.0, which is largely
based on the SBR sequencing batch reactor process, and cultivates
and utilizes the unique properties of the anaerobic-anoxic-aerobic
bacteria species in the granules, to achieve COD and nutrient
removal with lower aeration energy.
AGS (Aerobic Granular Sludge) Technology Advantages/Benifits
- Lower footprint and space requriements
- Reduced energy consumption - almost lowest energy
consumption besides MABR process
- Nutrient removal without chemicals - nitrification and denitrification,
phosphate removalSimultaneous nitrification and
denitrification, and able to achieve high level of N removal
- Phosphsphorous removal
- Tolerates wide swings in flow and organic loading
- No clarifier required (same as SBR)
- Better control over filamentous growth and settling problems
- Less equipment to service and maintain (compared to SBR:
no decanter, no mixer)
- Existing ASP or SBR plants can be converted to AGS
- No need to use bacteria or biofilm-supporting packing medium or solids-separation membranes
Wastewater Engineering Group provides AGS -aerobic granule
wastewater treatment plant and process design services, consulting,
retroffing and new plants.
- AGS Plant Design
- AGS Process Design
- Pilot Test
- Startup and Commissioning
- Equipment Supply and Servicing
A process flow diagram of a typical AGS system is as shown above.
The processes inside the Sequencing Batch Reactor system include
- Fill/Draw - raw sewage or wastewater is filled into the SBR
tank, and it flows from bottom of the tank upwards to expell out
the supernatant on top of the tank, which is the treated waste
from previous batch. Anaerobic hydrolysis takes place during
this phase, and phosphate is released from the sludge into the
- React - aeration process for the carbonanceous organic pollutant
removal, in the meantime, ammonia is removed by nitrification
in the aerobic and anoxic layers of the aerobic granule.
Phosphate is uptaken by the PAOs (Phosphate accumulating
organisms) and removed from the bulk liquid.
- Settlement - settling of sludge after the react. The AGS
granules settles very fast and within 5 mins it has all settled
to the bottom of the tank.
Some major equipments used in Sequencing Batch Reactor System
- Pretreatment equipment: bar rakes, coarse and fine screens
- Fine bubble aeration systems: air blowers and diffusers
- Pumps for raw wastewater and treated effluent pumping
- AGS sludge thickening, dewatering and further treatment
- Effluent disinfection systems
Wastewater Engineering Group offers integrated AGS wastewater
treatment plants /facility and process design, planning, for sewage
disposal and water reuse.