Performance of an anaerobic baffled reactor (ABR) as a hydrolysis-acidogenesis unit in treating landfill leachate mixed with municipal sewage

2000 ◽  
Vol 42 (12) ◽  
pp. 115-121 ◽  
Author(s):  
B. Wang ◽  
Y. Shen
Keyword(s):  
Landfill Leachate ◽  
Loading Rate ◽  
Granular Sludge ◽  
Operational Performance ◽  
Municipal Sewage ◽  
Organic Loading Rate ◽  
Stable Operation ◽  
Organic Loading ◽  
Anaerobic Baffled Reactor ◽  
Biological Treatability

A study on the performance of an Anaerobic Baffled Reactor(ABR) as a hydrolysis-acidogenesis unit in treating the mixed wastewater of landfill leachate and municipal sewage in different volumetric ratios was carried out. The results showed that ABR substantially improved the biological treatability of the mixed wastewater by increasing its BOD5/COD ratio to 0.4–0.6 from the initial values of 0.15–0.3. The formation of bar-shaped granular sludge of 0.5–5 mm both in diameter and length with an SVI of 7.5–14.2 ml/g was observed in all compartments of the ABR when the organic loading rate reached 4.71 kgCOD/m3 · d. The effects of the ratios of NH4+-N/COD and COD/TP in mixed wastewater on the operational performance were also studied, from which it was found that a reasonable NH4+-N/COD ratio should be lower than 0.02, and the phosphorus supplement was needed when the volumetric ratio was higher than 4:6 for stable operation of ABR.

TOC based control of anaerobic reactor treating wastewater from a fruit juice packaging factory

2011 ◽  
Vol 6 (2) ◽  
Author(s):  
Jan-Willem Warmenhoven ◽  
Henri Spanjers
Keyword(s):  
Control Strategy ◽  
Fruit Juice ◽  
Loading Rate ◽  
Control Variable ◽  
Poor Performance ◽  
Granular Sludge ◽  
Organic Loading Rate ◽  
Stable Operation ◽  
Organic Loading ◽  
Large Fluctuations

This paper describes the application of TOC as a control variable for a full-scale expanded granular sludge bed (EGSB) reactor treating wastewater from a fruit juice packaging factory. The carbohydrate-rich wastewater shows high variations in both flow and concentration. Treatment efficiency was too low before the implementation of the TOC based control, while the design loading rate could not be achieved. The poor performance was associated with large fluctuations of the wastewater load in combination with several other factors, including: too small an equalisation tank, insufficient mixing in the equalisation tank and too course a control scheme (based on flow only), which failed to deliver a smooth enough organic loading to the EGSB reactor to secure stable performance. A control strategy based on inline wastewater TOC was developed and implemented in order to cope with the large fluctuations of the wastewater load. This paper describes the TOC based control strategy and the treatment performance obtained after its implementation. Combining TOC based control with better operation of the equalisation tank is shown to have improved the performance of the EGSB reactor. Even with a relatively small equalisation tank in combination with a fluctuating load the control strategy enables stable operation of the reactor. Among other improvements COD removal has increased from 50% to 82% despite a load increase from 1700 to 2100 kgCOD/d, equivalent to an organic loading rate of 11.3 to 14 kg/m3d.

Treatment of Low-Strength Wastewater Using an Anaerobic Baffled Reactor at Low Temperature

2013 ◽  
Vol 325-326 ◽  
pp. 822-826
Author(s):  
Zong Lian She ◽  
Xiao Hui Fu ◽  
Jian Wu ◽  
En Shi ◽  
Lai Li Zhao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Loading Rate ◽  
Oxygen Demand ◽  
Granular Sludge ◽  
Organic Loading Rate ◽  
Scanning Electron Micrographs ◽  
Organic Loading ◽  
Microbial Composition ◽  
Anaerobic Baffled Reactor ◽  
Low Strength

Treatment of low-strength wastewater of chemical oxygen demand (COD) around 500-1500 mg/L was studied in a 100 L capacity laboratory scale anaerobic baffled reactor (four compartments) at low temperature (17 oC-25 oC). The reactor was operated at influent COD concentrations of 1500, 1000 and 500 mg/L and hydraulic retention times (HRTs) of 24, 12 and 8 h, with the average COD removals changing from 94% to 83%. Compartment-wise studies of various parameters revealed that if the organic loading rate (OLR) was larger, the initial compartment played significant role in the removal of organics. The examinations of scanning electron micrographs (SEM) indicated that the microbial composition of granular sludge were obviously different in four compartments.

scholarly journals Effect of organic loading rate on the performance of modified anaerobic baffled reactor treating landfill leachate containing heavy metals

2021 ◽  
Author(s):  
Imran Ahmad ◽  
Norhayati Abdullah ◽  
Shreeshivadasan Chelliapan ◽  
Santhana Krishnan ◽  
Iwamoto Koji ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Landfill Leachate ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Anaerobic Baffled Reactor

scholarly journals The feasibility of trace element supplementation for stable operation of wheat stillage-fed biogas tank reactors

2011 ◽  
Vol 64 (2) ◽  
pp. 320-325 ◽  
Author(s):  
J. Gustavsson ◽  
B. H. Svensson ◽  
A. Karlsson
Keyword(s):  
Trace Element ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Biogas Production ◽  
Organic Loading Rate ◽  
Stable Operation ◽  
Organic Loading ◽  
Process Stability ◽  
Volatile Solids ◽  
High Sulfate

The aim of this study was to investigate the effect of trace element supplementation on operation of wheat stillage-fed biogas tank reactors. The stillage used was a residue from bio-ethanol production, containing high levels of sulfate. In biogas production, high sulfate content has been associated with poor process stability in terms of low methane production and accumulation of process intermediates. However, the results of the present study show that this problem can be overcome by trace element supplementations. Four lab-scale wheat stillage-fed biogas tank reactors were operated for 345 days at a hydraulic retention time of 20 days (37 °C). It was concluded that daily supplementation with Co (0.5 mg L−1), Ni (0.2 mg L−1) and Fe (0.5 g L−1) were required for maintaining process stability at the organic loading rate of 4.0 g volatile solids L−1 day−1.

Aerobic granular sludge in an SBR-system treating wastewater rich in particulate matter

2004 ◽  
Vol 49 (11-12) ◽  
pp. 41-46 ◽  
Author(s):  
N. Schwarzenbeck ◽  
R. Erley ◽  
P.A. Wilderer
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Primary Particle ◽  
Loading Rate ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Particle Uptake ◽  
Tracer Experiments

Aerobic granular sludge was successfully cultivated in a lab-scale SBR-system treating malting wastewater with a high content of particulate organic matter (0.9 gTSS/L). At an organic loading rate (CODtotal) of 3.4 kg/(m3·d) an average removal efficiency of 50% in CODtotal and 80% in CODdissolved was achieved. Fractionation of the COD by means of particle size showed that particles with a diameter less than 25–50 μm could be removed at 80% efficiency, whereas particles bigger than 50 μm were only removed at 40% efficiency. Tracer experiments revealed a dense sessile protozoa population covering the granules. The protozoa appeared to be responsible for primary particle uptake from the wastewater.

Impact of Hydraulic Retention Time at Constant Organic Loading Rate in a Two-Stage Expanded Granular Sludge Bed Reactor

2014 ◽  
Vol 31 (6) ◽  
pp. 317-323 ◽  
Author(s):  
Mahyar Ghorbanian ◽  
Robert M. Lupitskyy ◽  
Jagannadh V. Satyavolu ◽  
R. Eric Berson
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Granular Sludge ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Two Stage

Effect of organic loading rate (OLR) on the performance of modified anaerobic baffled reactor (MABR) supported by slanted baffles

2017 ◽  
Vol 79 ◽  
pp. 56-63 ◽  
Author(s):  
Maizatul Asnie Mohd Aris ◽  
Shreeshivadasan Chelliapan ◽  
Mohd Fadhil Md Din ◽  
Aznah Nor Anuar ◽  
Rafidah Shahperi ◽  
...  
Keyword(s):  
Loading Rate ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Anaerobic Baffled Reactor

Continuous Fermentative Hydrogen Production from Brown Sugar Using EGSB Reactor

2010 ◽  
Vol 113-116 ◽  
pp. 1132-1137 ◽  
Author(s):  
Yong Feng Li ◽  
Yong Ming Hui ◽  
Xin Yao ◽  
Lu Wang ◽  
Qian Wen Song ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Granular Sludge ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Hydrogen Production Rate ◽  
Brown Sugar ◽  
Fermentative Hydrogen Production ◽  
Fermentative Hydrogen

In this experiment, brown sugar was chosen as the substrate of continuous operation. A lab-scale expanded granular sludge blanket (EGSB) reactor was employed. Stable ethanol-type fermentation was formed by controlling the organic loading rate (OLR). The results showed a maximum hydrogen production rate of 5.73L / L reactor•d was achieved, under the condition that the hydraulic retention time (HRT) = 2h, OLR = 97.2kg COD/m3 reactor•d. The average hydrogen content in the biogas during the 73-day operation was 41.27%.

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