APPARATUS AND METHOD FOR WASTEWATER TREATMENT BY ACTIVATED SLUDGE PROCESS TYPE

摘要

flowing sludge from air supplying vessels(30a,30b,30c) to a mixing vessel(33) by a pump(36) and re-supplying air through an airline(35) to maintain DO over 4; flowing sludge and liquid waste into a respiration chamber(39) at once through an organic liquid waste inlet line(32) using pumps(31)(34); measuring inflow DOs and outflow DOs and calculating a respiration rate(Ra) by dC9(t)/dt=(Q9/v9)x (Ci(t)-C9(t))-R(t)(C9(t); calculating a non-respiration rate(ra) by ra=Ra/Xv; comparing the non-respiration rate(ra) with a upper limit(rah) and a lower limit(rai), calculating organic concentration (TOD=Si) by L-f(ra)=Qa x Si(Qa: inflow quantity of air supplying vessel), and calculating an inflow quantity of the respiration chamber(39) to control the pumps(31)(34).