Treatment of Catalyst Wastewater in a Three-Phase Flow Airlift Loop Bioreactor

A 12-L gas–liquid–solid three-phase flow airlift loop bioreactor, in which micro-organism immobilization replaced the activated sludge, was used for the nitrifying treatment of the original effluent from Catalyst Complex of Qilu Petrochemical Corp. of SINOPEC, Zibo City, Shandong Province, P.R. China. The original wastewater contained a high strength NH4–N of up to 2,437 mg L−1 and solution electrical conductivity (EC) of nearly 22,000 μScm−1 . The influences of temperature, pH value, superficial gas velocity (ug) and hydraulic residence time (HRT) on the reductions of COD and NH4–N were investigated and discussed, respectively. The optimum operation condition was obtained as temperature 30–35°C, pH value 7.0–7.5, ug 10 mm s−1 , and HRT 15 h at the solid hold-up es up to 50%. Under this optimum operation condition, the average removal efficiencies of COD and NH4 –N were higher than 85 and 99%, respectively, corresponding to the effluent COD, 25 mg L−1 and NH4 –N, 15 mg L−1 , which was in compliance with t...

[1]  P. N. Sarma,et al.  Treatment of composite chemical wastewater by aerobic GAC-biofilm sequencing batch reactor (SBGR). , 2005, Journal of hazardous materials.

[2]  Mao Guozhu,et al.  Nitrifying treatment of wastewater from fertilizer production in a multiple airlift loop bioreactor , 2005 .

[3]  Ji-ti Zhou,et al.  Integration of nitrification and denitrification in airlift bioreactor , 2005 .

[4]  J. Rubio,et al.  Characterization and environmental application of a Chilean natural zeolite , 2005 .

[5]  J. Wen,et al.  Nitrifying Treatment of Wastewater from Fertilizer Production in a Three‐Phase Flow Airlift Loop Bioreactor , 2003 .

[6]  L. Weatherley,et al.  Ammonia removal from wastewater by ion exchange in the presence of organic contaminants. , 2003, Water research.

[7]  Hyung-Sool Lee,et al.  Wastewater treatment in a hybrid biological reactor using powdered minerals: effects of organic loading rates on COD removal and nitrification , 2002 .

[8]  J M Lema,et al.  Nitrification in saline wastewater with high ammonia concentration in an activated sludge unit. , 2002, Water research.

[9]  J. Macinnes,et al.  Nitrogen removal from wastewater by a catalytic oxidation method. , 2001, Water research.

[10]  D. Stuckey,et al.  Nitrification of high strength ammonia wastewaters: comparative study of immobilisation media. , 2001, Water research.

[11]  J. Heijnen,et al.  Integration of nitrification and denitrification in biofilm airlift suspension reactors , 2000 .

[12]  Van Santen,et al.  Low temperature oxidation of ammonia to nitrogen in liquid phase , 1999 .

[13]  Willy Verstraete,et al.  Treatment and Reuse of Wastewater from the Textile Wet-Processing Industry : Review of Emerging Technologies , 1998 .

[14]  H. ApSimon,et al.  Cost-effective strategies for the abatement of ammonia emissions from European agriculture , 1998 .

[15]  F. Kargi,et al.  Biological Treatment of Saline Wastewater in an Aerated Percolator Unit Utilizing Halophilic Bacteria , 1996 .

[16]  G. L. Sant'anna,et al.  Aerobic treatment of wastewaters in a three‐phase fluidized‐bed bioreactor: A comparison of two types of polymeric supports , 1994 .

[17]  T. Nieuwstad,et al.  Fluidization and Sedimentation of Carrier Material in a Pilot-Scale Airlift Internal-Loop Reactor , 1992 .

[18]  P. Mensi,et al.  Biochemical aspects of water quality criteria: The case of ammonia pollution(°) , 1981 .

[19]  J. S. Watson,et al.  An electroconductivity technique for the measurement of axial variation of holdups in three-phase fluidized beds , 1978 .