ANAEROBIC TREATMENT METHOD AND APPARATUS

摘要

ANAEROBIC TREATMENT OF WATER IS PERFORMED UNDER ANAEROBIC CONDITIONS WITH A BIOFILM FORMED ON A SURFACE OF A FLUID NON-BIOLOGICAL CARRIER (4) IN A REACTION VESSEL (3). STABLE HIGH-LOAD TREATMENT IS PERFORMED BY PREVENTING THE BLOCKAGE OF THE REACTION VESSEL (3) CAUSED BY THE FLOTATION AND ADHESION OF THE NON-BIOLOGICAL CARRIER IN THE REACTION VESSEL (3) AND EFFECTIVELY RECOVERING THE SETTLEABILITY OF THE CARRIER FLOATING OWING TO ADHERING AIR BUBBLES BY SIMPLE MEANS. A REACTION VESSEL (3) IS CHARGED WITH A FLUID NON-BIOLOGICAL CARRIER (4) HAVING A SIZE IN THE RANGE OF 1.0 TO 5.0 MM AND A SETTLING VELOCITY IN THE RANGE OF 200 TO 500 M/H. PART OF THE CARRIER THAT HAS FLOATED AND FLOWED OUT OF THE REACTION VESSEL (3) IS FED DOWNWARD THROUGH A PIPE HAVING A VERTICAL HEIGHT OF 50 CM OR MORE SO AS TO REMOVE AIR BUBBLES ADHERING TO THE CARRIER AND IS RETURNED TO THE REACTION VESSEL (3).