| abstract |
An advanced treatment method for biochemical tail water of coking wastewater. By using poly-ferric sulfate (PFS) and polyacrylamide (PAM) as flocculants for pretreating the biochemical tail water of coking wastewater, the wastewater is subjected to precipitation, separation and filtration, and the effluent water passes through a packed column provided with a nano composite material, thus implementing advanced treatment of coking wastewater. The adsorption is stopped when the adsorption reaches the breakthrough point, and desorption regeneration is carried out by using a sodium hydroxide water solution as a desorbing agent. The high-concentration desorption liquid is concentrated, and sent out for incineration or production of coal water slurry; and the low-concentration desorption liquid is used for preparing the sodium hydroxide water solution for the next batch of desorption operation. |