Liu Hua

Post nitrogen removal biofiltration system

Constant-water-level control system of rear nitrogen-removing biological filtering pool

A filter block for denitrification deep -bed filter and senior catalytic oxidation pool

Filler used for sewage plant external whole-process deodorization system and preparation method of filler

Biological culture tank for external full-flow deodorizing system of sewage plant and application of biological culture tank

Arc roof weir for post nitrogen removal biofilter

V-shaped post denitrification biological filter

Rear denitrification and biofiltration system

Pipe weir of post-positioned denitrification biofilter

Backwashing air pipeline for post nitrogen removal biofilter