Suspended media membrane biological reactor system including suspension system and multiple biological reactor zones

A wastewater treatment system comprising:

• a first biological reaction zone constructed and arranged to receive and treat the wastewater;
• a second biological reaction zone including a separation subsystem, the second biological reaction zone constructed and arranged to receive effluent from the first biological reaction zone and the separation subsystem constructed and arranged to maintain an adsorbent material in the second biological reaction zone with the effluent from the first biological reaction zone, the separation subsystem including a settling zone comprising a first baffle and a second baffle positioned and dimensioned to define a quiescent zone in which the adsorbent material separates from mixed liquor and settles into the mixed liquor in a lower portion of the biological reactor;
• a gas lift suspension system constructed and arranged to maintain the adsorbent material in the second biological reaction zone;
• and
• a membrane operating system located downstream of the second biological reaction zone that is constructed and arranged to receive treated wastewater from the second biological reaction zone and discharge a membrane permeate.

A wastewater treatment system comprising:

• a biological reactor comprising a separation subsystem constructed and arranged to maintain adsorbent material in the biological reactor with a mixed liquor;
• a gas lift suspension system positioned in the biological reactor, the suspension system constructed and arranged to maintain adsorbent material in suspension with the mixed liquor, the gas lift suspension system including at least a pair of baffles positioned in the biological reactor forming at least one draft trough positioned in the biological reactor, and a gas conduit having one or more apertures positioned and dimensioned to direct gas to a lower portion of the draft trough;
• and
• a membrane operating system located downstream of the biological reactor that is constructed and arranged to receive treated mixed liquor from the biological reactor and discharge a membrane permeate.

A wastewater treatment system comprising:

• a first biological reaction zone constructed and arranged to receive and treat the wastewater;
• a second biological reaction zone including a separation subsystem, the second biological reaction zone constructed and arranged to receive effluent from the first biological reaction zone and the separation subsystem constructed and arranged to maintain an adsorbent material in the second biological reaction zone with the effluent from the first biological reaction zone;
• a gas lift suspension system constructed and arranged to maintain the adsorbent material in the second biological reaction zone, the gas lift suspension system including at least a pair of baffles positioned in the biological reactor forming at least one draft trough positioned in the biological reactor, and a gas conduit having one or more apertures positioned and dimensioned to direct gas to a lower portion of the draft trough;
• and
• a membrane operating system located downstream of the second biological reaction zone that is constructed and arranged to receive treated wastewater from the second biological reaction zone and discharge a membrane permeate.