INCLUSIVE IMMOBILIZATION SUPPORT, WASTEWATER DISPOSAL APPARATUS AND WASTEWATER DISPOSAL METHOD USING THE INCLUSIVE IMMOBILIZATION SUPPORT

摘要

An inclusive immobilization support satisfying the requirements: (A) the deformation ratio of the formula (H0-H1)/H0, wherein H0 refers to the thickness of the support before compression and H1 to the thickness of the support at breakage by compression, be 70% or higher, and (B) the particle diameter thereof fall within the range of 0.1 to 1.5 mm. The inclusive immobilization support is charged in a biological treatment tank without screen, and any inclusive immobilization support entrained by treated water to thereby flow out into a solid-liquid separation tank is returned to the biological treatment tank by pump transfer. Accordingly, as damaging of the inclusive immobilization support is suppressed at the return to the biological treatment tank by pump, it is not needed to reconstruct the existing biological treatment tank in which wastewater disposal is performed using active sludge. Further, as the particle diameter can be reduced, there can be accomplished striking enhancement of disposal efficiency.