Hydrolytic Acidification And Aerobic Membrane Biological Process Handling Ammunition Destruction Of Wastewater

The main contaminant in the wastewater of explosive disposal is 2,4,6-trinitrotoluene(TNT)belonging tO recalcitrant.For searching for the efficient combination process, this paper studiedcharacteristics of biological hydrolysis-membrane biological reactor in explosive disposalwastewater treatment.The function of hydrolysis and the TNT removal rate were affected obvisously byco-metabolizing additional carbon source.When hydraulic retention time (HRT) was 40hours,TNT removal rate was 53.4% without co-substrate or 99% with 4.8: l COD ratio of co-substrateto TNT.Ammonia-nitrogen concentration and (NO₃)^-/(NO₂)^- concentration was low ineffluent It can be obtained that 62.5% of TNT was mineralized by calculating the converts ofnitrogen.The increase of sludge was very slow and no sludge was discharged under experimentalconditions. Biological hydroysis became very poor when water temperature was below l5℃, andin good state as temperature was above 20℃. Under low MLSS and lower operation pressure,itshowed lineal relationship between flux decrease and MLSS increase,lineal increase relationshipbetween flux and operation pressure,and 0.2L/m²·h flux increased amounts with each 5℃ rise.Membrane adsorption and blockage resulted in flux disease and gel layer resistan was notobvious. Compared with the treatment results of biological hydrolysis-powdered actived carbonactivated sludge process and several advanced oxidation process, biological hydrolysis-membrane biological reactor is the best one.