| 摘要 |
<p>PCT No. PCT/AU96/00202 Sec. 371 Date Oct. 3, 1997 Sec. 102(e) Date Oct. 3, 1997 PCT Filed Apr. 9, 1996 PCT Pub. No. WO96/31266 PCT Pub. Date Oct. 10, 1996A self cleaning filter for aqueous media such as sewage effluent which comprises a ventilated bed of discrete filtration material such as particulates, finely ground or shredded non-oil plastic materials, clay particulates, ground zeolite, diatomaceous earth powdered activated carbon, short fibre carbon and fine crushed charcoal, in which is dispersed a population of living organisms such as worms, insects, mothfly larvae, collembola, crustaceans and mites, which organisms have the ability to maintain at least a surface layer of the bed in an open and aerobic state.</p> |
