ENTRAPPING IMMOBILIZATION PELLETS AND PROCESS FOR PRODUCING THE SAME, AND WASTEWATER TREATMENT PROCESS AND EQUIPMENT USING THE SAME

摘要

An encapsulated immobilization carrier, which increases nitrifying activities promptly and has a stable carrier strength, a process for producing the encapsulated immobilization carrier, and a process and an equipment for wastewater treatment using the encapsulated immobilization carrier are provided. An encapsulated immobilization carrier is characterized in that the encapsulated immobilization carrier encapsulates and immobilizes sludge of purified water containing nitrifying bacteria as an encapsulated immobilization carrier for encapsulating and immobilizing microorganisms. A process for producing an encapsulated immobilization carrier comprises: mixing a purified water sludge containing nitrifying bacteria with an immobilizing material; and gelating the mixture to encapsulate and immobilize the purified water sludge as a seed sludge of the nitrifying bacteria. A process for producing an encapsulated immobilization carrier comprises: mixing a sludge containing nitrifying bacteria and having a VSS/SS value range of 0.1 to 0.3 with an immobilizing material such that an SS concentration of the sludge per the encapsulated immobilization carrier becomes 2 mass% or more; and gelating the mixture to encapsulate and immobilize the sludge.