Study On Powder Activated Carbon And MBR Integration Treatment Of The Slightly Polluted Water

Water pollution in our country becomes more and more serious, conventional process theexistence of soluble organic pollutants, ammonia nitrogen, THMFP etc can’t effectively removeweakness; In addition, the drinking water quality standard life continues to improve, explore new,more efficient water treatment technology is water treatment of the workers of the important task.For ultrafiltration membrane only suitable for handling pollution degree very low source water,of ammonia nitrogen removal of poor results this problem, the subject has test device add30g/Lhigh concentrations of activated carbon powder, and the selection of ultrafiltration membranecomponent integration of processing unit, use of activated carbon adsorption, microbialdegradation function, ultrafiltration membrane interception effect, investigation test device, andbecome the starting up process of operation decontamination characteristics.First survey of the experiment device startup behavior. The results show that, ammonia nitrogen,UV254removal efficiency of speaking test start time can be completed in about45d, ammonianitrogen content from an average of7.65mg/L to0.38mg/L, removal rate reached95%; UV254from an average of0.28(A) to0.047(A), removal rate reached83%. But the water content ofnotrite reduced need65d or so that the reactor nitrification microorganism cultivation of the needfor two months.At different operation conditions of the decontamination characteristics. Three kinds ofmembrane flux:10L/(m~2.h),15L/(m~2.h),20L/(m~2.h), TOC an average of5.09mg/L, removal ratewas62.6%~68.1%; UV254removal rate was84.6%~95.1%; Effluent turbidity stability in0.4NTU, only with the flux of membrane pressure increase rose more quickly. Three kinds ofhydraulic retention time:1.5h,2.5h,3.5h, and the results show that the longer the HRTdecontamination the better, but for the1.5h HRT, ammonia water concentration lower than theliving and drinking water hygiene standards (GB5749-2006) regulation0.5mg/L limits, reflectthe combination of high technology in ammonia nitrogen ability.Under the condition of different dissolved oxygen content of SMP and EPS marked change;Aeration strength and hydraulic reverse wash of relief membrane pollution effect is remarkable,and the test of the hydraulic reverse wash strength to determine60L/m~2.h, best aeration strengthin5.0m~3/㎡.h; Using1%NaOH+75%ethanol cleaning method to hollow fiber membranecleaning, using scanning electron microscopy and testing data found the film washing efficiency,achieve85%above, cleaning effect is better.