Use of cloth-media filter for membrane bioreactor treating municipal wastewater.
This study evaluated three different textile materials (Acrylate, Polyester, and Nylon) as filter media for MBR treating municipal wastewater. Chemical oxygen demand (COD) loading rates were 1.71, 1.65 and 1.84 g/l d while feed/microorganisms (F/M) ratios were 0.32, 0.31 and 0.33 in Reactor 1, Reactor 2 and Reactor 3, respectively. The actual hydraulic retention times were 8.6, 8.9 and 8.0 h in R1, R2 and R3. At 5.3-5.5 g/l mixed liquor suspended (MLSS) and 26.3 days solid retention time (SRT) the membrane bioreactors were effective in removing 93-95% of COD, 99% of total suspended solids (TSS) and turbidity, 89-94% of total kjeldahl nitrogen (TKN) and 90-96% of total ammonia nitrogen. Phosphorous removal was limited to 51-55% while faecal coliform was reduced by four logs. Quality of the treated effluents met both Saudi and Egyptian reuse standards for restricted irrigation and could be easily disinfected to meet the unrestricted irrigation standards.
Prince Khalid Bin Sultan Chair for Water Research, Civil Engineering Department, College of Engineering, King Saud University, Riyadh, Saudi Arabia. wmzahid@ksu.edu.sa
Waleed M
WM
Zahid
Saber A
SA
El-Shafai
D001420:Bacteria, Aerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D002947:Cities; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D007220:Industrial Waste / Q000517:prevention & control; D008422:Materials Testing; D008567:Membranes, Artificial; D010100:Oxygen / Q000378:metabolism; D013784:Textiles / Q000382:microbiology*; D014462:Ultrafiltration / Q000295:instrumentation*; D014873:Water Pollutants / Q000302:isolation & purification / Q000378:metabolism*; D018508:Water Purification / Q000295:instrumentation*
D007220:Industrial Waste; D008567:Membranes, Artificial; D014873:Water Pollutants; D010100:Oxygen