Patent ID: 6776903
Filing Date: 2004-08-17
Classification: C02F

Abstract:
A waste-water treatment system comprising:an inflow pipe for introducing wastewater containing suspended solids into the system, an outflow pipe for removing treated water from the system, an attachment filter including a packing material located therein to which suspended solids are attached wherein anaerobic microorganisms are propagated in the filter and solids attached to the packing material are anaerobically digested and digested solids realize an increase in specific gravity and descend to a bottom section of the filter, wherein the attachment filter has a negatively charged radical ring-shaped thread structure comprising a plurality of radially extending ring-shaped bodies as the packing material; a sedimentation section in said bottom section of the filter where digested solids are collected; and a discharge port provided in the sedimentation section of the filter so that digested solids are discharged from the filter via the discharge port located in the sedimentation section at the bottom section of the filter.