Effects of Organic Loading Rates on Treatment Performance in a Polyvinylidene Media Based Fixed-Film Bioreactor

2009 ◽  
Vol 14 (4) ◽  
pp. 238-242
Author(s):  
Zubair Ahmed ◽  
Sang-Eun Oh ◽  
In S. Kim
Keyword(s):  
Organic Loading ◽  
Loading Rates ◽  
Treatment Performance ◽  
Fixed Film ◽  
Fixed Film Bioreactor

The anaerobic treatment of low strength wastewaters in UASB and EGSB reactors

1997 ◽  
Vol 36 (6-7) ◽  
pp. 375-382 ◽  
Author(s):  
Mario T. Kato ◽  
Jim A. Field ◽  
Gatze Lettinga
Keyword(s):  
Detrimental Effect ◽  
Granular Sludge ◽  
Anaerobic Treatment ◽  
Organic Loading ◽  
Methanogenic Activity ◽  
Loading Rates ◽  
Treatment Performance ◽  
The Media ◽  
Low Strength ◽  
Uasb Reactors

The application of the UASB and EGSB reactors for the treatment of low strength wastewaters was investigated. The effect of dissolved oxygen on the methanogenic activity of granular sludges, the low substrate levels inside reactors and lower temperatures on the treatment performance were evaluated. The results showed that methanogens located in granular sludge have a high tolerance to oxygen. The concentration to cause 50% inhibition to methanogenic activity was between 7% and 41% oxygen in the head space of flasks, corresponding to 0.05 mg/l and 6 mg/l of DO prevailing in the media, respectively. The feasibility of UASB and EGSB reactors at 30°C was demonstrated. In UASB reactors, COD removal efficiencies exceeded 95% at organic loading rates up to 6.8 g COD/l.d and influent COD concentrations ranging from 422 to 722 mg/l, during the treatment of ethanol substrate. In EGSB reactors, efficiencies were above 80% at OLRs up to 12 g COD/l.d with COD as low as 100 to 200 mg/l. The studies confirmed that in practice DO does not constitute any detrimental effect on the reactor treatment performance. Lowering the temperature down to 15°C in EGSB reactors also showed that the potentials of anaerobic technology can be further explored in the treatment of dilute wastewaters.

scholarly journals Influence of design parameters on the treatment performance of VF wetlands – a simulation study

2019 ◽  
Vol 80 (2) ◽  
pp. 265-273
Author(s):  
Bernhard Pucher ◽  
Guenter Langergraber
Keyword(s):  
Filter Material ◽  
Treatment Wetlands ◽  
Design Parameters ◽  
Vertical Flow ◽  
Organic Loading ◽  
Treatment Efficiency ◽  
Main Approach ◽  
Loading Rates ◽  
Treatment Performance ◽  
Different Temperatures

Abstract The main approach for designing vertical flow (VF) treatment wetlands is based on areal requirements ranging from 2 to 4 m2 per person equivalent (PE). Other design parameters are the granularity of the filter material, filter depth, hydraulic and organic loading rates, loading intervals, amount of single doses as well as the number of openings in the distribution pipes. The influence of these parameters is investigated by running simulations using the HYDRUS Wetland Module for three VF wetlands with different granularity of the filter material (0.06–4 mm, 1–4 mm, and 4–8 mm, respectively). For each VF wetland, simulations are carried out at different temperatures for different organic loading rates, loading intervals and number of distribution points. Using coarser filter material results in reduced removal of pollutants and higher effluent concentrations if VF wetlands are operated under the same conditions. However, the treatment efficiency can be increased by applying more loadings and/or a higher density of the distribution network. For finer filter material, longer loading intervals are suggested to guarantee sufficient aeration of the VF filter between successive loadings.

Anaerobic filter and DSFF reactors in anaerobic treatment of tuna processing wastewater

1994 ◽  
Vol 30 (12) ◽  
pp. 425-432 ◽  
Author(s):  
M. C. Veiga ◽  
R. Méndez ◽  
J. M. Lema
Keyword(s):  
Anaerobic Treatment ◽  
Cod Removal ◽  
Organic Loading ◽  
Processing Industry ◽  
Loading Rates ◽  
Anaerobic Filter ◽  
Anaerobic Reactors ◽  
Start Up ◽  
Fixed Film ◽  
Removal Efficiencies

An anaerobic filter (AF) and a downflow stationary fixed film (DSFF) reactor were used for the treatment of a tuna processing wastewater. Start-up of the anaerobic reactors was improved using lactose as co-substrate. The AF removed up to 75% of the influent COD concentrations at organic loading rates (OLR) of 11-13 kg COD m−3 d−1, whereas the DSFF reactor removed 70% at 3 kg COD m−3 d−1. Based on these results it appears that anaerobic treatment systems are applicable to tuna processing industry wastewaters and that the AF shows a much better performance, allowing higher organic loadings and COD removal efficiencies than the DSFF reactor.

Influence of organic loading rates on treatment performance of membrane bioreactor treating tannery wastewater

2021 ◽  
pp. 101810
Author(s):  
Thi-Dieu-Hien Vo ◽  
Xuan-Thanh Bui ◽  
Bao-Trong Dang ◽  
Thanh-Tin Nguyen ◽  
Van-Truc Nguyen ◽  
...  
Keyword(s):  
Membrane Bioreactor ◽  
Tannery Wastewater ◽  
Organic Loading ◽  
Loading Rates ◽  
Treatment Performance

Influence of organic loading and aeration rates on performance of a lab-scale upflow aerated submerged fixed-film bioreactor

2011 ◽  
Vol 89 (3) ◽  
pp. 193-197 ◽  
Author(s):  
Ali Baradar Khoshfetrat ◽  
Hossein Nikakhtari ◽  
Mohammad Sadeghifar ◽  
Mohammad Shaker Khatibi
Keyword(s):  
Organic Loading ◽  
Fixed Film ◽  
Fixed Film Bioreactor

EFFECTS OF ORGANIC LOADING RATE ON PALM OIL MILL EFFLUENT TREATMENT IN AN UP-FLOW ANAEROBIC SLUDGE FIXED FILM BIOREACTOR

2006 ◽  
Vol 5 (3) ◽  
pp. 337-350 ◽  
Author(s):  
Abdul Rahman Mohamed ◽  
Ali Akbar Zinatizadeh Lorestani ◽  
Mat Don Mashitah ◽  
Ahmad Zuhairi Abdullah ◽  
Mohamed Hasnain Isa
Keyword(s):  
Palm Oil ◽  
Loading Rate ◽  
Effluent Treatment ◽  
Palm Oil Mill Effluent ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
Organic Loading ◽  
Fixed Film ◽  
Palm Oil Mill ◽  
Fixed Film Bioreactor

Microbial technology for management of phenol bearing dyestuff wastewater

1996 ◽  
Vol 33 (8) ◽  
pp. 47-51 ◽  
Author(s):  
Pradnya Kanekar ◽  
Seema Sarnaik ◽  
Anita Kelkar
Keyword(s):  
Loading Rate ◽  
Methyl Violet ◽  
Oxygen Demand ◽  
Loading Rates ◽  
Novel Approach ◽  
Fixed Film ◽  
Microbial Film ◽  
Fixed Film Bioreactor ◽  
Concrete Tank ◽  
Dyestuff Wastewater

Environmental pollution caused by dyestuff industry wastewater is two-fold since it contains toxic chemicals like phenol, aniline etc. and also imparts the colour of the dye manufactured. For management of dyestuff wastewater, microbial technology becomes a novel approach since microorganisms have the characteristic ability to break down aromatic compounds and decolourize the dyes. Microbial treatment of a dyestuff wastewater containing phenol and methyl violet was studied at the site of a dye factory near Pune in a fixed film bioreactor. The bioreactor consisted of a rectangular cement concrete tank of dimensions 9.5 m length × 7.3 m breadth × 1.5 m height and brick pieces of size 10 cm × 8 cm × 6.5 cm used as supporting media for formation of microbial film. A mixed culture of Pseudomonas alcaligenes (phenol degrader) and Pseudomonas mendocina (decolourizing methyl violet) grown in the dyestuff wastewater was spread on brick media. After formation of a microbial film on brick media, the dyestuff wastewater was recycled in form of a shower through the brick bed for 24, 48 and 72h. The influent loading rate was 1.44 m3/m2 brick bed area per day. The phenol and Chemical Oxygen Demand (COD) loading rates were on average 0.9 kg phenol/m2/day and 5.67 kg COD/m2/day respectively. The performance of the microbial degradation evaluated for a period of 68 days showed 97.5%, 63%, 54.4% and 51% removal in phenol, methyl violet (MV) content, COD and Total Organic Carbon (TOC) respectively in 24 hours of recycling and marginally enhanced in 48 and 72 hours. The microbial technology was thus effective in removal of phenol and the dye from dyestuff wastewater.

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