METHOD FOR ADJUSTING ACTIVATED SLUDGE, AND METHOD AND APPARATUS FOR TREATING ORGANIC WASTEWATER USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a system for simply and rapidly decide an index for determining the introducing amount or treatment intensity with respect to a liquefying treatment process to adjust the properties of sludge on the basis of the index. SOLUTION: In the method for adjusting activated sludge, the biological decomposition properties and activity of activated sludge microorganisms are adjusted on the basis of a change in the concentration of soluble potassium in sludge before and after liquefying treatment at the time of liquefying treatment of activated sludge microorganisms. The method for treating organic wastewater has a process for liquefying at least a part of activated sludge in the treatment of organic wastewater having an aerobic treatment process, and the supply amount of activated sludge to the liquefying treatment process and/or the treatment condition in the liquefying treatment process is controlled to 10-80% of the index.