The invention belongs to the technical field of
sewage treatment and relates to a
biofilter suitable for
sewage treatment of water-network type village ditches. The
biofilter is divided into ten cells along the length direction thereof by a baffle plate, coarse gravel is placed at the bottom layer of each
cell, two
layers are arranged on the coarse gravel, five
filter material baskets are horizontally placed at each layer, the
filter material baskets are filled with home-made
nitrogen /
phosphorus removal
filter material, and plants are planted in the upper-layer filter material basket; the home-made ceramisite filter material is searched and developed through two steps (firing and modification); after the filter material reaches
absorption saturation degree, the filter material can be taken out of the filter material baskets; and because of adsorbing
nutrient elements such as
nitrogen and
phosphorus, the filter material is enhanced in
fertility, can be agriculturally used as
fertilizer or a
soil conditioner for non-edible
plant, thus achieving the purpose of
resource utilization. The
biofilter is simple in structure and low in investment, artificial
aeration and filter material backwash are not carried out,
oxygen is only charged in a natural manner, thus realizing the purposes of no power, no
energy consumption and convenient management, and the biofilter is a novel process suitable for
sewage treatment of water-network type village ditches in China.