Study of application and test on treatment of polyester wastewater with anaerobic reactors

On the treatment of polyester wastewater with UASB,there are three parts in the UASB such as the completed mixing anaerobic sludge bed at the lower part,the completed mixing suspended sludge layer at the middle part and the plug-flow three-phase separator at the upper part of the UASB.Another conclusion is that the degradation reaction of COD accord with the monod equation.The two theories of UASB were combined together here.After validated by test study,some conclusions could be reasoned out.That is the performances of UASB lie on the height of the reactor,the optimum height of reactor is 4.5～6 m and the appropriate height of sludge bed is 2～2.5 m,the obvious particulate sludge area and suspended sludge area form in UASB,the COD volume loading could be up to 6～9.5 kg/m~(3),the removal of COD is 75%～80%.Some other advantages of UASB are fast starting,particulate sludge forming easily and enduring pulse loading etc.1fig.,9refs.