IMAS

REGION

IMAS (Integrated Membrane Activated Sludge)

IMAS achieves the fundamental dual goals of minimising both membrane area and energy consumption while prodcuing membrane quality effluent.

Cost effective UF membrane quality effluent
50% lower energy consumption than an MBR
50% less membrane area than an MBR
No air scour required
No ultra fine prescreening required
Reduced footprint

IMAS achieves the fundamental dual goals of minimizing both membrane area and energy consumption while prodcuing membrane quality effluent. This is accomplished by dramatically lowering the membrane fouling rate by managing the composition and concentration of particles which contact the membrane surface.

The low fouling nature of IMAS generated suspended particles allows the transmembrane pressure drop to remain consistently low, even when challenged with high peak flow periods and varying influent turbidities. Although the membrane influent turbidity can vary significantly, the membrane permeate turbidity consistently remains less than 0.1 NTU. The design and operation of IMAS technology creates a complimentary synergy between the biological and membrane processes, allowing for the highest total system efficiency to be achieved, while maintaining a compact footprint and generating minimum waste sludge.

IMAS

REDUCED ENERGY CONSUMPTION

IMAS energy consumption is greatly reduced due to no air scour requirement, no multi-Q recirculation pumping between the membranes and the biological process and a higher oxygen transfer efficiency MLSS concentration. With the ever increasing costs and environmental concerns associated with energy consumption, IMAS offers a realistic alternative for the production of ultrafiltration membrane quality effluent

WASTEWATER PROCESS FLEXIBILITY

NITRIFICATION
Nitrification is required when a wastewater effluent ammonia-nitrogen limit is specified. Nitrification is the biological oxidation of ammonia to nitrite (NO2) and then to nitrate (NO3). The microorganism responsible for this conversion are the autotrophic species Nitrosomonas and Nitrobacter

DENITRIFICATION
Denitrification is required when the wastewater effluent nitrate nitrogen or total nitrogen limit is specified. Nitrates are converted to nitrogen gas through denitrification which is achieved under anoxic (absence of free dissolved oxygen) conditions. Nitrate reducing bacteria are facultative heterotrophs.

PHOSPHORUS REMOVAL
Phosphorus can be removed biologically to levels of 1 - 3 mg/l without the addition of chemicals. If the discharge requirement is less than 1 mg/l, chemicals such as alum or ferric chloride can be added for co-precipitation.