Patent ID: 6818123
Filing Date: 2004-11-16
Classification: A01K,C02F,Y02W,Y10S

Abstract:
A water purification system through denitrifying reduction with faculative anacrobes, comprisingan aerobic circulating pathway for aerobic treatment of water through a filter using aerobic bacteria in which nitrate is produced; an anaerobic circulating pathway for anaerobic treatment of water through a filter using anaerobic bacteria, said anaerobic circulating pathway comprising a box anaerobic bottom filter body comprising a draining board upper plate part including a plurality of holes, a pair of shower pipes positioned for drainage and discharge inside said bottom filter body at opposed opposite ends of said filter body, each of said pair of shower pipes having a longitudinal direction and connected at an opening end side to a closed anaerobic filter device, and containing a plurality of jetting holes in the longitudinal direction, said bottom filter body capable of being arranged on a bottom part of a water tank for breeding aquatic creatures; powdery sand or a water-permeable and oxygen-impermeable screen member separating said aerobic circulating pathway and said anaerobic circulating pathway with said aerobic circulating pathway and said anaerobic circulating pathway being separately arranged so that nitrate produced in said aerobic circulating pathway is exuded into said anaerobic circulating pathway through said powdery sand or a water-permeable and oxygen-impermeable screen member, and the nitrate is decomposed in said anaerobic circulating pathway separately arranged from said aerobic circulating pathway; and said powdery sand or water-permeable and oxygen-impermeable screen member is placed on an upper face of said draining board upper plate part of the anaerobic bottom filter body, and water existing inside the anaerobic bottom filter body is capable of being circulated through the closed anaerobic filter device to conduct reducing treatment and contacted with said powdery sand or screen member located on the upper face of the draining board upper plate part through the plurality of holes.