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Dewatering

Two-stage MBR. First stage: convert organics into methane. Second stage: remove nutrients. methane. O 2. Minimal Pretreatment (grit removal, screens). Anaerobic MBR. Effluent. Influent. Anaerobic. Anoxic. membranes. membranes. sludge (8-10% P). stabilized sludge. Dewatering.

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Dewatering

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  1. Two-stage MBR First stage: convert organics into methane Second stage: remove nutrients methane O2 Minimal Pretreatment (grit removal, screens) Anaerobic MBR Effluent Influent Anaerobic Anoxic membranes membranes sludge (8-10% P) stabilized sludge Dewatering Objectives: recover more energy from the organics, use less O2 produce less sludge, first stage generates carbon needed for N and P removal, avoid chemicals for disinfection. stabilized solids (high P)

  2. Laboratory setup First stage converts organics into methane Second stage removes nutrients

  3. MBR Project Team Dept. Civil & Environmental Engineering, Stanford University Craig Criddle SU, Assoc. Prof Daniel Yeh Univ. S. Florida, Asst Prof Young Lee SU, Postdoc Bob Hickey Ecovation, VP Philip Wong SU, PhD student Chok Hang Joanne Yeung SU, PhD student Charles Hardy SU, MS student (graduated) George Wells SU, PhD student Bob Brown SU Exp Lab Alicia Ng SU, undergrad

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