WATER SPRAY AND AIR DIFFUSION MECHANISM FOR SOIL TYPE WASTEWATER TREATMENT APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a pipeline mechanism which can prevent the clogging of water spray and air diffusion pipes and their peripheries. SOLUTION: The supply of wastewater and the forcible supply of air to a soil treatment apparatus by the porous water spray and air diffusion pipes 7a and 7b are made possible, the supply of wastewater and the forcible supply of air to the respective porous water spray and air diffusion pipes 7a and 7b are made to be repeated alternately every prescribed time, and the use and stop of the water spray and air diffusion pipe 7a of an upper stage and the water spray and air diffusion pipe 7b of a lower stage are made to be changed over by a three-way valve 6.