scholarly journals Biological treatment of petroleum contaminated soils by soil slurry-sequencing batch reactors (SS-SBRs)

2008 ◽  
Author(s):  
B. Torabifar ◽  
A. Torabian ◽  
A. A. Azimi ◽  
M. Vossoughi
Keyword(s):  
Contaminated Soils ◽  
Biological Treatment ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Soil Slurry

Biological treatment of a soil contaminated with diesel fuel using periodically operated slurry and solid phase reactors

1997 ◽  
Vol 35 (1) ◽  
pp. 185-192 ◽  
Author(s):  
D. P. Cassidy ◽  
R. L. Irvine
Keyword(s):  
Diesel Fuel ◽  
Biological Treatment ◽  
Solid Phase ◽  
Batch Reactors ◽  
Silty Clay ◽  
Sequencing Batch Reactors ◽  
Clay Loam ◽  
Soil Slurry ◽  
Silty Clay Loam ◽  
Hydraulic Residence Time

A silty clay loam contaminated with diesel fuel was treated in the laboratory using periodically operated slurry and solid phase bioreactors. Soil Slurry-Sequencing Batch Reactors (SS-SBRs) were operated with a 40% solids concentrations (w/v) to determine the effect of hydraulic residence time and volumetric replacement strategy on performance. Solid Phase-Sequencing Batch Reactors (SP-SBRs) were operated with the same silty clay loam artificially contaminated with diesel fuel. Different periodic aeration strategies were investigated in the SP-SBRs in an attempt to minimize volatile losses without sacrificing overall removal efficiency. Results showed that a day 10 HRT in the SS-SBRs was optimal for the soil tested. The rate and extent of diesel fuel removal was increased by providing a higher concentration of diesel fuel at the beginning of the SBR cycle, indicating that removal rates are not zero-order. The findings also showed that a properly operated periodic venting strategy produced high overall removal efficiencies with considerably less volatilization than continuous aeration.

Substrate Removal Mechanism for Sequencing Batch Reactors

1986 ◽  
Vol 18 (6) ◽  
pp. 21-33 ◽  
Author(s):  
D. Orhon ◽  
Y. Cimşit ◽  
O. Tünay
Keyword(s):  
Biological Treatment ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Removal Mechanism ◽  
Factors Affecting ◽  
Substrate Removal ◽  
Reactor Types ◽  
The Many

All factors affecting substrate removal in sequencing batch reactor types of biological treatment systems should be fully explored to benefit from the many flexibilities of operation they offer. In this paper, a growth limited model is proposed for this purpose and verified by experimental observations. Interpretation of the results enabled a broader description of the process. It also indicated a number of interesting issues requiring further exploration.

Explosive biodegradation in soil slurry batch reactors amended with exogenous microorganisms

2001 ◽  
Vol 43 (3) ◽  
pp. 291-298 ◽  
Author(s):  
C. F. Shen ◽  
J. A. Hawari ◽  
L. Paquet ◽  
G. Ampleman ◽  
S. Thiboutot ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Anaerobic Sludge ◽  
Batch Reactors ◽  
Municipal Sludge ◽  
Anaerobic Conditions ◽  
Soil Slurry ◽  
Dry Soil ◽  
Biodegradation In Soil

The present study explores the feasibility of biotreatment of 2,4,6-trinitrotoluene (TNT) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX)-contaminated soils in slurry batch reactors. Radiorespirometric assays showed that anaerobic sludge was able to mineralize 59% RDX to CO2 although significant mineralization of TNT was not observed in all cases. TNT and RDX at concentrations higher than 50 and 100 mg/L respectively were inhibitory to methanogenesis (used as a bioindicator), however, methanogenesis recovered after TNT was transformed into less toxic triaminotoluene. Bioslurry batch reactors containing 40% of contaminated soil (2000 mg RDX and 1000 mg TNT/kg dry soil) were operated under various conditions. Both TNT and RDX were persistent to soil indigenous microbes. Degradation of both TNT and RDX was enhanced by the municipal sludge amendment, although degradation of RDX was only achieved under anaerobic conditions.

Biological Treatment of Waste Waters Containing Chlorophenols in Sequencing Batch Reactors

1990 ◽  
pp. 1121-1122
Author(s):  
J. Kaufmann ◽  
H. Krebs ◽  
O. Debus ◽  
P. Wilderer ◽  
M. Rubio
Keyword(s):  
Biological Treatment ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Waste Waters

Combined chemical biological treatment of bleached eucalypt kraft pulp mill effluent

2007 ◽  
Vol 55 (6) ◽  
pp. 143-150 ◽  
Author(s):  
D.B. Ruas ◽  
A.H. Mounteer ◽  
A.C. Lopes ◽  
B.L. Gomes ◽  
F.D. Brandão ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Kraft Pulp ◽  
Pulp Mill ◽  
Equivalent Dose ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Bleached Kraft Pulp ◽  
Before And After ◽  
Ozone Pretreatment ◽  
Recalcitrant Organic Matter

Effectiveness of ozonation before and after biological treatment for removal of recalcitrant organic matter in bleached kraft pulp effluents was compared. Two industrial ECF bleached eucalypt kraft pulp effluents (E1 and E2) were pretreated with 100 mg O3/L. Raw and pretreated effluents were treated biologically in bench-scale sequencing batch reactors, under constant conditions. Following biological treatment, effluents were post-treated with 100 and 200 mg O3/L. Effluent pretreatment increased effluent biodegradability by 10% in E1 and 24% in E2. Combined O3-biological treated led to small but significant increases in COD, BOD and lignin removal over biological treatment alone, but pretreatment had no significant effect on effluent colour and carbohydrate removal. Ozone pretreatment did not affect biological activity during treatment of effluent E1 but resulted in a 38% lower specific oxygen uptake rate in effluent E2. At an equivalent dose of 100 mg/L, pre-ozonation produced better quality effluent than post-ozonation, especially with regard to COD and colour. Likewise, when an equivalent dose of 200 mg/L was applied, splitting the dose equally between pre- and post-treatments was more efficient than applying the entire dose in the post-treatment. The potential for combined chemical–biological treatment to improve effluent quality has been confirmed in this study.

Sign in / Sign up

Export Citation Format

Share Document