An anaerobic wastewater treatment system includes a recycle tank, a
bioreactor tank and a bioselector for recapturing anaerobic microbial
consortia particles escaping from the bioreactor tank and returning them
to the bioreactor tank. The bioreactor tank receives recycled wastewater
feed from a recycle tank and discharges via an overflow outlet treated
wastewater and microbial consortia particles to a bioselector. The
bioselector is adapted to separate entrained microbial consortia
particles and return a feed to the bioreactor tank which including some
of the treated wastewater received from the bioreactor tank and the
microbial consortia particles received from the bioreactor tank. The
bioselector provides a recycle feed to the recycle tank. Overflow from
the bioselector provides an effluent of treated wastewater leaving the
system.