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 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

Treatment of organic wastewater by anaerobic biological fluidized bed reactor

1994 ◽  
Vol 29 (12) ◽  
pp. 157-166 ◽  
Author(s):  
Szu-Kung Tseng ◽  
Min-Ray Lin
Keyword(s):  
Wastewater Treatment ◽  
Specific Surface ◽  
Fluidized Bed ◽  
Removal Efficiency ◽  
Temperature Drop ◽  
Biomass Concentration ◽  
Fluidized Bed Reactor ◽  
Anaerobic Reactor ◽  
Digestive Rate ◽  
Organic Wastewater

Anaerobic biological fluidized bed method (AFBBR) for wastewater is already known to have higher specific surface area and biomass concentration than the conventional complete-mixing anaerobic reactor, so the removal efficiency for organic wastewater treatment is higher. Experiments were carried out with three kinds of wastewaternamely synthetic domestic and MSG wastewater. The results show that the AFBBR can exploit its advantages to compensate for the decrease in the digestive rate caused by temperature drop, while still showing the high treatability of organic wastewater. Treating wastewater containing chlorophenol and nitrophenolat below 0.9 kg compound/m3.d, the COD removal efficiency can reach ≥ 90%.

Transient Responses of Wastewater Treatment and Biomass Development in a Methanogenic Fluidized Bed

1991 ◽  
Vol 23 (7-9) ◽  
pp. 1327-1336 ◽  
Author(s):  
Hiroaki Furumai ◽  
Takahiro Kuba ◽  
Tsuyoshi Imai ◽  
Tetsuya Kusuda
Keyword(s):  
Fatty Acids ◽  
Fluidized Bed ◽  
Volatile Fatty Acids ◽  
Biomass Concentration ◽  
Fluidized Bed Reactor ◽  
Anaerobic Treatment ◽  
Synthetic Wastewater ◽  
Transient Responses ◽  
Active Biomass ◽  
Bacterial Groups

The objectives of this study are to develop a model which can express the characteristics of anaerobic treatment in a methanogenic fluidized bed reactor in non-steady states, and evaluate the usefulness of the model in which “active” biomass concentration is used as an index of bacteria concentration instead of traditional ones such as volatile suspended solids. The treatment in the fluidized bed reactor started with biocoated synthetic zeolite as support material. The reactor was supplied with synthetic wastewater, a mixture of volatile fatty acids. An experiment on response was conducted according to changing stepwise the influent concentration. Batch experiments on activity were carried out under several steady state conditions, using a kind of volatile fatty acid as a substrate. Transient responses of water quality are investigated in relation to the growth of bacterial groups which decompose volatile fatty acids. Based on the results, a dynamic model is proposed, in which attached biomass is categorized into “active” biomass and inert organic matter. The transient response of substrate concentrations was clearly expressed by considering the growth of “active” biomass. It was impossible to explain the responses when VSS was regarded as the biomass concentration in the model.

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 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.

CFD study of the hydrodynamics and biofilm growth effect of an anaerobic inverse fluidized bed reactor operating in the laminar regime

2020 ◽  
pp. 104674
Author(s):  
Jorge Ramírez-Muñoz ◽  
Román Guadarrama-Pérez ◽  
Alejandro Alvarado-Lassman ◽  
José J. Valencia-López ◽  
Valaur E. Márquez-Baños
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Growth Effect ◽  
Laminar Regime ◽  
Biofilm Growth ◽  
Inverse Fluidized Bed ◽  
Reactor Operating

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
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