Treatment of Spent Broth from an Antibiotic Manufacturing Unit Using Anaerobic Fixed Film Fixed Bed Reactor

2003 ◽  
Vol 38 (9) ◽  
pp. 1971-1979 ◽  
Author(s):  
Shanta Satyanarayan ◽  
Rita S. Dhodapkar ◽  
R. D. Vyas ◽  
S. N. Kaul
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Fixed Film

Sulfate Reduction in Acidogenic Phase Anaerobic Digestion

1988 ◽  
Vol 20 (11-12) ◽  
pp. 345-351 ◽  
Author(s):  
M. A. M. Reis ◽  
L. M. D. Gonçalves ◽  
M. J. T. Carrondo
Keyword(s):  
Anaerobic Digestion ◽  
Sulfate Reduction ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Continuous Stirred Tank Reactor ◽  
Acetic Acid Production ◽  
Sulfate Removal ◽  
Fermentative Bacteria ◽  
Fixed Film ◽  
Acidogenic Phase

The acidogenic phase of a two-stage anaerobic digestion process using distillery molasses slops effluent with high sulfate concentrations (4.2-5.1 g/l) was investigated. Removal of sulfate was studied at pH 5.8, 6.2, 6.6 and in two different reactors: continuous stirred tank reactor and an upflow fixed film fixed bed reactor. Batch experiments were carried out to obtain the maximum specific growth rates of sulfate reducing bacteria (SRB) at the above mentioned pH values. The biological sulfate removal increased with pH and so did the acetic acid production from the fermentative bacteria and SRB. For the same pH and hydraulic retention time the sulfate reduction was more efficient in the fixed film reactor than in the CSTR. The soluble sulfides from the sulfate reduction presented at the acidogenic reactor effluent were precipitated before the methanogenic phase to avoid biogas contamination and methanogenic bacteria inhibition; under such conditions, sulfide concentrations in the biogas thus produced were very low and high methane volumetric rates of production were achieved.

Anaerobic Treatment of a Black Liquor Evaporator Condensate from a Kraft Mill in Three Types of Fixed-Film Reactors

1983 ◽  
Vol 15 (8-9) ◽  
pp. 247-259 ◽  
Author(s):  
J Norrman
Keyword(s):  
Fluidized Bed ◽  
Methane Production ◽  
Black Liquor ◽  
Fixed Bed ◽  
Anaerobic Treatment ◽  
Fixed Bed Reactor ◽  
Expanded Bed ◽  
Cod Reduction ◽  
Fixed Film ◽  
Kraft Mill

A black liquor evaporator condensate from a kraft mill was anaerobically treated in a fixed bed reactor (= an anaerobic filter), an expanded bed and a fluidized bed. The condensate treated in the fixed bed reactor and the expanded bed had an average COD concentration of 1.4 kg/m3. Before treatment in the fluidized bed the condensate was diluted to 0.42 kg/m3. Efficient purification (80 % COD-reduction or better) was obtained at volumetric loads up to 2 kg COD/m3·d in the fixed bed reactor, 10 kg COD/m3·d in the expanded bed and 13 kg COD/m3·d in the fluidized bed. The specific methane production was 0.10-0.30 m3/kg COD added in the fixed bed reactor, 0.07-0.15 m3/kg COD added in the expanded bed and 0.07-0.20 m3/kg COD added in the fluidized bed.

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