ChemInform Abstract: Anaerobic Purification of Waste Water from Sugar Production in Fluidized Bed Reactors.

ChemInform ◽  
2010 ◽  
Vol 23 (37) ◽  
pp. no-no
Author(s):  
K. BUCHHOLZ ◽  
H. DIEKMANN ◽  
H.-J. JOERDENING ◽  
A. PELLEGRINI ◽  
G. ZELLNER
Keyword(s):  
Waste Water ◽  
Fluidized Bed ◽  
Fluidized Bed Reactors ◽  
Sugar Production

Biofilm Fluidized-Bed Reactors and Their Application to Waste Water Nitrification

1983 ◽  
Vol 413 (1 Biochemical E) ◽  
pp. 168-183 ◽  
Author(s):  
IRVING J. DUNN ◽  
HIROKI TANAKA ◽  
SUHEYLA UZMAN ◽  
MIRAN DENAC
Keyword(s):  
Waste Water ◽  
Fluidized Bed ◽  
Fluidized Bed Reactors

Review on the application of anaerobic fluidized bed reactors in waste-water treatment

1989 ◽  
Vol 41 (3) ◽  
pp. B37-B50 ◽  
Author(s):  
J.J. Heijnen ◽  
A. Mulder ◽  
W. Enger ◽  
F. Hoeks
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Fluidized Bed ◽  
Waste Water Treatment ◽  
Fluidized Bed Reactors

Influence of waste water composition on biofilm development in laboratory methanogenic fluidized bed reactors

1988 ◽  
Vol 29 (1) ◽  
pp. 95-102 ◽  
Author(s):  
Leon G. M. Gorris ◽  
Jan M. A. van Deursen ◽  
Chris van der Drift ◽  
Godfried D. Vogels
Keyword(s):  
Waste Water ◽  
Fluidized Bed ◽  
Fluidized Bed Reactors ◽  
Water Composition ◽  
Biofilm Development

Treatment of Waste Water at the El Aguila Brewery (Madrid, Spain). Methanization in Fluidized Bed Reactors

1990 ◽  
Vol 22 (1-2) ◽  
pp. 483-490 ◽  
Author(s):  
E. Oliva ◽  
J. C. Jacquart ◽  
C. Prevot
Keyword(s):  
Waste Water ◽  
Fluidized Bed ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Process Efficiency ◽  
Waste Water Treatment Plant ◽  
Fluidized Bed Reactors ◽  
Purification Process ◽  
Brewery Effluent

After 2 years of operation in the waste water treatment plant of the El Aguila brewery, the performance of the ANAFLUX fluidized bed reactors could be examined. For the treatment of the brewery effluent, an acidification tank is required upstream of the reactors so that high COD loadings (up to 60 Kg COD/m3/day) could be applied to the fluidized beds for hydraulic retention times of 2 hours. The wide variations in the pollutant load do not have any irreparable effects on the efficiency of the purification process. Efficiency of the acidification and methanization line reaches 80% of soluble COD and 72% of total COD. An additional aerobic finishing treatment further increases the levels of efficiency (less than 50 mg/l COD at the plant outlet).

Application of Anaerobic Fluidized Bed Reactors in Biological Waste Water Treatment

1986 ◽  
Vol 38 (12) ◽  
pp. 419-428 ◽  
Author(s):  
J. J. Heijnen ◽  
W. A. Enger ◽  
A. Mulder ◽  
P. A. Lourens ◽  
A. A. Keijzers ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Fluidized Bed ◽  
Waste Water Treatment ◽  
Fluidized Bed Reactors ◽  
Biological Waste Water Treatment

Influence of Seeding Conditions on Initial Biofilm Development during the Startup of Anaerobic Fluidized Bed Reactors

1989 ◽  
Vol 21 (4-5) ◽  
pp. 157-165 ◽  
Author(s):  
F. Ehlinger ◽  
J. M. Audic ◽  
G. M. Faup
Keyword(s):  
Fluidized Bed ◽  
Future Development ◽  
Protein Concentration ◽  
Specific Activity ◽  
Fluidized Bed Reactor ◽  
Fluidized Bed Reactors ◽  
Support Material ◽  
Biofilm Development ◽  
Initial Biofilm

The characterization of the biofilm of an anaerobic fluidized-bed reactor was completed under standard conditions. The distribution of the fixed protein concentration depended on the level in the reactor. The protein concentration reached 1520 µg.g−1 of support at the top of the reactor and only 1200 µg.g−1 at the bottom after 504 hours of operation but the specific activity of the biofilm was 33×10−4 µM acetate.h−1.mg−1 proteins at the bottom and only 26×10−4 µM.h−1.mg−1 at the top. The efficiency of a fluidized bed reactor and the composition of the biofilm changed with an increase of the pH from 7 to 8.5 during the seeding of the support material. Future development of the biofilm and the specific activity of the support were affected.

Anaerobic/aerobic biodegradation of pentachlorophenol using GAC fluidized bed reactors: optimization of the empty bed contact time

1997 ◽  
Vol 36 (6-7) ◽  
pp. 107-115 ◽  
Author(s):  
Gregory J. Wilson ◽  
Amid P. Khodadoust ◽  
Makram T. Suidan ◽  
Richard C. Brenner
Keyword(s):  
Fluidized Bed ◽  
Oxygen Demand ◽  
Aerobic Biodegradation ◽  
Fluidized Bed Reactors ◽  
Reactor Performance ◽  
Reactor Operation ◽  
Significant Cost ◽  
Second Stage ◽  
Primary Substrate ◽  
Chlorinated Phenolic Compounds

An integrated reactor system has been developed to remediate pentachlorophenol (PCP) containing wastes using sequential anaerobic and aerobic biodegradation. Anaerobically, PCP was degraded to predominately equimolar concentrations (>99%) of monochlorophenol (MCP) in two GAC fluidized bed reactors at Empty Bed Contact Times (EBCTs) ranging from 18.6 to 1.15 hours. However, at lower EBCTs, MCP concentrations decreased to less than 10% of the influent PCP concentration suggesting mineralization. The optimal EBCT was determined to be 2.3 hours based on PCP conversion to MCPs and stable reactor operation. Decreasing the EBCT fourfold did not inhibit degradation of PCP and its intermediates, thus allowing removal of PCP at much lower detention time and resulting in a significant cost advantage. Analytical grade PCP was fed via syringe pumps into two fluidized bed reactors at influent concentrations of 100 mg/l and 200 mg/l, respectively. Acting as the primary substrate, ethanol was also fed into the reactors at concentrations of 697 and 1388 mg/l. Effluent PCP and chlorinated phenolic compounds were analyzed weekly to evaluate reactor performance. Biodegradation pathways were also identified. 3-chlorophenol (CP) was the predominant MCP and varied simultaneously with 3,5-dichlorophenol (DCP) concentrations. Likewise, 4-CP concentrations varied simultaneously with 3,4-DCP concentrations. A second stage aerobic GAC fluidized bed reactor was added after the anaerobic reactor to completely mineralize the remaining MCP and phenols. Data show no presence of phenol and MCP in the effluent or on the GAC. Overall, the chemical oxygen demand (COD) fed to the system was reduced from 75 g/d in the influent to less than 1.5 g/d in the effluent.

Aromatic Transformation in Fluidized Bed Reactors

2008 ◽  
Vol 73 (8-9) ◽  
pp. 1061-1088
Author(s):  
Sule Rabiu ◽  
Sulaiman Al-Khattaf
Keyword(s):  
Fluidized Bed ◽  
The Other ◽  
Fluidized Bed Reactors ◽  
Y Zeolite ◽  
Y Zeolites ◽  
Toluene Disproportionation ◽  
Xylene Isomerization ◽  
Toluene Methylation ◽  
Toluene Conversion ◽  
Medium Acidity

In this work three important aromatic transformations, namely: toluene disproportionation, toluene methylation and m-xylene isomerization, were investigated in a riser simulator which closely mimics the operation of commercial fluidized bed reactors. The transformations were studied over a ZSM-5 based catalyst with medium acidity of 0.23 mmol/g and a series of Y zeolites of acidities between 0.55 and 0.03 mmol/g. For pure toluene feed, it was observed that conversion over the ZSM-5 based catalyst and the weakly acidic Y zeolite (USY-1) was very low. However, with the highly acidic Y zeolite (H-Y), significant toluene conversion was observed with paring reaction more prominent than disproportionation. On the other hand, when toluene was alkylated with methanol, higher toluene conversions were achieved over both the ZSM-5 based and the weakly acidic USY-1 catalysts as compared to when pure toluene feed was used. In addition, p-xylene/o-xylene (P/O) ratios higher than the equilibrium values were obtained in the reaction product over both catalysts. Finally, for m-xylene isomerization it was found that m-xylene conversion increased initially as the acidity of the catalyst increased up to 0.1 mmol/g beyond which any further increase in acidity resulted in a slight decrease in the m-xylene conversion.

Optimal polymer grade transitions for fluidized bed reactors

2020 ◽  
Vol 88 ◽  
pp. 86-100 ◽  
Author(s):  
Yajun Wang ◽  
Lorenz T. Biegler ◽  
George S. Ostace ◽  
Rita A. Majewski
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactors
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