Anaerobic treatment of real textile wastewater with a fluidized bed reactor

2003 ◽  
Vol 37 (8) ◽  
pp. 1868-1878 ◽  
Author(s):  
S Şen ◽  
G.N Demirer
Keyword(s):  
Fluidized Bed ◽  
Textile Wastewater ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment

Anaerobic treatment and biogas recovery for sago wastewater management using a fluidized bed reactor

2001 ◽  
Vol 44 (6) ◽  
pp. 141-147 ◽  
Author(s):  
R. Saravanane ◽  
D. V.S. Murthy ◽  
K. Krishnaiah
Keyword(s):  
Fluidized Bed ◽  
Large Scale ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Solid Content ◽  
Treated Wastewater ◽  
Maximum Efficiency ◽  
Cow Dung ◽  
Wastewater Management ◽  
High Concentration

Starch manufacturing industrial units, such as sago mills, both at medium and large scale, suffer from inadequate treatment and disposal problems due to high concentration of suspended solid content present in the effluent. In order to investigate the viability of treatment of sago effluent, a laboratory scale study was conducted. The treatment of sago effluent was studied in a continuous flow anaerobic fluidized bed reactor. The start-up of the reactor was carried out using a mixture of digested supernatant sewage sludge and cow dung slurry in different proportions. The effect of operating variables such as COD of the effluent, bed expansion, minimum fluidization velocity on efficiency of treatment and recovery of biogas was investigated. The treated wastewater was analysed for recycling and reuse to ensure an alternative for sustainable water resourse management. The maximum efficiency of treatment was found to be 82% and the nitrogen enriched digested sludge was recommended for agricultural use.

Anaerobic treatment of low concentration waste water in an inverse fluidized bed reactor

2000 ◽  
Vol 41 (4-5) ◽  
pp. 245-251 ◽  
Author(s):  
P. Castilla ◽  
M. Meraz ◽  
O. Monroy ◽  
A. Noyola
Keyword(s):  
Fluidized Bed ◽  
Removal Efficiency ◽  
Suspended Solids ◽  
Municipal Wastewater ◽  
Specific Activity ◽  
Biomass Concentration ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Low Concentration ◽  
Inverse Fluidized Bed

Low concentration synthetic and municipal wastewaters were treated at HRT as short as 3 and 0.6 h respectively in an anaerobic inverse fluidized bed. Both bioreactors showed gas hold up due to the liquid downflow pattern of the prototype. The bioreactor operated at 3 h had a removal efficiency of 83%, specific activity of 4.5 kg CODremoved/kg IVS (d and the gas hold up varied from 23 to 55%. The reactor treating municipal wastewater had a removal efficiency of 44% when operating at 0.6 h, the specific activity was 4.2 kg CODremoved/kg IVS (d and no biogas was detected apparently because an important fraction was dissolved in the liquid phase. The biomass concentration was 13.8 and 1.1 kg IVS/m3 for synthetic and municipal wastewater and the SEM microphotographs showed a bacterial diversity for the first run and only cocci cells for the second run. The system does not remove suspended solids, so a polishing postreatment to improve water quality has to be implemented.

Anaerobic treatment of pinkwater in a fluidized bed reactor containing GAC

2002 ◽  
Vol 92 (1) ◽  
pp. 77-88 ◽  
Author(s):  
Stephen W Maloney ◽  
Neal R Adrian ◽  
Robert F Hickey ◽  
Robert L Heine
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment

Potential for anaerobic treatment of wastewater from pet bottle washing in a fluidized bed reactor

2019 ◽  
Vol 31 ◽  
pp. 100817
Author(s):  
Letícia Martini Braz ◽  
Ana Beatriz Soares Aguiar ◽  
Renata Piacentini Rodriguez ◽  
Giselle Patrícia Sancinetti
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment

Anaerobic treatment of sulfate-containing municipal wastewater with a fluidized bed reactor at 20 °C

2016 ◽  
Vol 73 (10) ◽  
pp. 2446-2452 ◽  
Author(s):  
B. Düppenbecker ◽  
P. Cornel
Keyword(s):  
Fluidized Bed ◽  
Removal Efficiency ◽  
Municipal Wastewater ◽  
Oxygen Demand ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Cod Removal ◽  
Sulfate Reducing ◽  
Mass Flows ◽  
Reducing Bacteria

This study focuses on the anaerobic treatment of sulfate-containing municipal wastewater at 20 °C with a fluidized bed reactor. Mean influent chemical oxygen demand (COD) and sulfate concentrations were 481 and 96 mg/l. The response of the COD removal efficiency to increasing organic loading rates (OLR) was investigated. Average total COD removal was 61% at OLR between 2.7 and 13.7 kg COD/(m³·d) and did not distinctly depend on the OLR. To assess the removal efficiency in more detail the COD in- and output mass flows were balanced. The results showed that only 11–12% of the input COD was recovered as gaseous methane. About 12–13% of the input COD remained in the effluent as dissolved methane. Furthermore, a distinct amount of 12–19% of the input COD remained in the reactor as settled sludge and was not further biologically degraded. Due to the reduction by sulfate-reducing bacteria, 13–14% of the input COD was degraded. Further adverse impacts of the influent sulfate on the anaerobic treatment process are discussed as well.

APLIKASI PROSES BIOLOGI ANAEROBIK PADA PENGOLAHAN AIR LIMBAH ORGANIK BERKONSENTRASI GARAM TINGGI “STUDI KASUS INDUSTRI UME BOSHI”

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Ikbal Mahmud
Keyword(s):  
Fluidized Bed ◽  
Removal Efficiency ◽  
Loading Rate ◽  
Salt Content ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Evolved Gas ◽  
Toc Removal ◽  
Anaerobic Fluidized Bed Reactor ◽  
Organic Carbon Loading

Anaerobic treatment of wastewater with high organic and salt content but low pH (TOC, 14 g/l; salt, 150 g/l; pH,2.7) generated during an “ume boshi” manufacturing process was investigated. Five-fold-diluted “ume boshi” effluent was treated by a draw-and-fill method at a volumetric TOC (total organic carbon) loading rate of 3.0  g/l/d with a TOC removal efficiency of 75%. Five-fold-diluted “ome boshi” effluent was also treated in an anaerobic fluidized-bed reactor (AFBR) at a maximum volumetric TOC loading rate of 3.0 g/l/d, which gave almost the same results as the draw-and-fill method. However, ten-fold-diluted “ome boshi” effluent could be treated in the AFBR at a maximum volumetric TOC loading rate of 11 g/l/d with a TOC removal efficiency of 85%. The methane content in the evolved gas was high, being 70%. The red pigment in the “ome boshi” effluent was completely decolorized by the anaerobic treatment.  Key words :, Anaerobic fluidized-bed reactor, “Ume boshi”Co2+ and Ni2+ ions, decolorization

A New Method of Sulphur Denitrification for Sewage Treatment by a Fluidized Bed Reactor

1986 ◽  
Vol 18 (7-8) ◽  
pp. 355-362 ◽  
Author(s):  
Saburo Matsui ◽  
Ryoko Yamamoto
Keyword(s):  
Fluidized Bed ◽  
Rate Constant ◽  
Sewage Treatment ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Nitrite Reduction ◽  
Consecutive Reactions ◽  
Relationship Of ◽  
Thiosulphate Oxidation ◽  
Reduced Forms

Anaerobic treatment of sewage has a problem of denitrification, because that organic carbon and hydrogen are recoverd mainly in the form of methane and not used for denitrification. Other electron donors must be introduced. Promising donors are reduced forms of sulphur. In this study, thiosulphate and elemental sulphur were used in fluidized bed reactor systems. Denitrification by oxidation of sulphur was unstable due to poor solubility of sulphur into sewage. Thiosulphate denitrification was very stable. Stoichiometric relationship of the denitrification and thiosulphate oxidation for the reactor was obtained. The denitrification process was described by the first order consecutive reactions. The rate constant of nitrate to nitrite reduction, kl varied between 2.05×10−2 and 1.09×10−1 (1/gVSS/l*min.). The rate constant of nitrite to nitrogen reduction, k2 varied between 1.41×10−1 and 9.08×10−1 (l/gVSS/l*min.).

Mathematical modelling for supporting scale-up of an anaerobic wastewater treatment in a fluidized bed reactor

1996 ◽  
Vol 34 (5-6) ◽  
pp. 501-508 ◽  
Author(s):  
Alexander Schwarz ◽  
Bahram Yahyavi ◽  
Marek Mösche ◽  
Claus Burkhardt ◽  
Hans-Joachim Jördening ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Fluidized Bed ◽  
Scale Up ◽  
Material Balance ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Biological Degradation ◽  
Charge Balance ◽  
Ph Gradients ◽  
Ph Values

The paper deals with a mathematical model for anaerobic treatment of waste water from sugar industry which has been developed for supporting the scale-up of a fluidized bed reactor. The dynamic model is based on material balance equations for substrates and products in gas and liquid phase. The effects taken into account are the biological degradation steps including chemical equilibria and mass transport between gas and liquid phase as well as convection and dispersion. Axial gradients of pH-values are calculated from a charge balance. Simulation results show reasonable agreement with measured gradients of substrates and pH in a 10 m3 fluidized bed reactor. For a new 500 m3 fluidized bed reactor simulations are performed to study the effects of increased hydrostatic pressure and increased ratio of feed to recirculation rate on the pH-values at the bottom of the reactor. The results indicate that for high COD-loading rates stationary pH-gradients may have significant influence upon the outcome of the process.

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