HBF biological filter / Bio Filter our products, HBF sponge filter is a combination of Germany advanced technology, independent research and patented, China made a low-maintenance filter, use a sponge and crystal biological removal of sewage waste and small particles. HBF biofilter unique characteristics (features) - a new generation of sponge filter - combined vortex and sponge filter - a national patent, patent number: ZL 2013 2 0689558.6 - low maintenance, according to the eddy current effect - nitrification and denitrification - inhibit the growth of algae, due to the low nitrate environment - you can use a pump mode, the gravity model - long service life of 15-20 years - 1 year warranty HBF biological filter works (working principle) HBF biological filter configuration sponge filter box or sponge (HBF I-1 to HBF I-6) and crystal Biological (HBF II-1 to HBF II-6) two layers of the filter box. First, the larger diameter piping sewage from flowing into the bottom of the tangential sponge, resulting in a large swirl causing pollution particles sink, only small particles and biological particles flow through most sponges, while the larger diameter pipe inlet reduces the water inflow velocity filter. Thus the sponge will not be frequently clogged, prolonging its life. Small particulate organic solutes through the inner sponge nitrification and denitrification to nitrogen discharged waste into the air. Secondly, the use of crystal filter box vertically downward biological medium (HBF II-1 to HBF II-6) a second filter, has more clear water reaches the biological treatment again completely purified. Use our HBF biological filter, you will not have algae pond problem! Manufactured using HDPE material HBF sponge filter must prevent direct sunlight and away from heat! Water Treatment Equipment Co., Ltd. Suzhou Ketu Suzhou Kingto Water Treatment Co., Ltd Address: Industrial Park, Suzhou City, Jiangsu Province, with 111 wins Road