Simultaneous nitrate and organic matter removal from salmon industry wastewater: The effect of C/N ratio, nitrate concentration and organic load rate on batch and continuous process

2012 ◽  
Vol 101 ◽  
pp. 82-91 ◽  
Author(s):  
C. Huiliñir ◽  
S. Hernández ◽  
E. Aspé ◽  
M. Roeckel
Keyword(s):  
Organic Matter ◽  
Nitrate Concentration ◽  
Continuous Process ◽  
Organic Load ◽  
Organic Matter Removal ◽  
Load Rate ◽  
Industry Wastewater ◽  
Organic Load Rate

Characterization and Comparison of Biomass from Mesophilic and Thermophilic Fixed Bed Anaerobic Digesters

1992 ◽  
Vol 25 (7) ◽  
pp. 203-212 ◽  
Author(s):  
M. Soto ◽  
R. Méndez ◽  
J. M. Lema
Keyword(s):  
Kinetic Parameters ◽  
Fixed Bed ◽  
Organic Load ◽  
Biomass Distribution ◽  
Anaerobic Digesters ◽  
Long Period ◽  
Load Rate ◽  
Attached Biomass ◽  
Different Levels ◽  
Organic Load Rate

Two lab-scale mesophilic (MAF) and thermophilic (TAF) anaerobic filters treating effluents from a mussel cooking factory were operated at their maximum organic load rate (OLR) for a long period of time. The biomass profiles and the distribution of occluded and attached biomass were determined. Biomass distribution in the MAF was more homogeneous along the filter. Most of the biomass in the TAF was attached while both attached and occluded biomass was observed in the MAF. The hydrolytic, acidogenic, acetogenic and methanogenic activities of sludges at different levels were determined. An attempt is made to explain the behaviour of both reactors as a function of these activities and other kinetic parameters.

scholarly journals Removal of nutrients and organic pollutants from domestic wastewater treatment by sponge-based moving bed biofilm reactor

2019 ◽  
Vol 25 (5) ◽  
pp. 652-658
Author(s):  
Huynh Tan Nhut ◽  
Nguyen Tri Quang Hung ◽  
Tran Cong Sac ◽  
Nguyen Huynh Khanh Bang ◽  
Tran Quang Tri ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Treatment Plan ◽  
Domestic Wastewater ◽  
Biofilm Reactor ◽  
Organic Load ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Domestic Wastewater Treatment ◽  
Load Rate ◽  
Organic Load Rate

This study evaluates the efficiency of domestic wastewater treatment via Sponge-Based Moving Bed Biofilm Reactor (S-MBBR). The laboratory-based treatment plan uses polyurethane sponge with a specific surface area was 260 m<sup>2</sup>/m<sup>3</sup> as a carrier. The treatment plan operated under four different organic load rate: OLR1 = 0.4 kg BOD/m<sup>3</sup>.day; OLR2 = 0.6 kg BOD/m<sup>3</sup>.day; OLR3 = 0.8 kg BOD/m<sup>3</sup>.day; and OLR4 = 1.0 kg BOD/m<sup>3</sup>.day. During 80 d of the experiment, the highest treatment efficiency was at the organic load rate of 0.4 kg BOD/m<sup>3</sup>.day, with COD, SS, TN and TP were found to be 85.0 ± 12.9%, 85.7 ± 5.3%, 68.9 ± 1.7%, and 40.3 ± 0.2%, respectively. In which, the influent SS concentration were from 117.3 to 126.0 mg/L, the effluent concentration were in ranged 18.0 to 34.22 mg/L, respectively. The values of influent and effluent COD were 298.8 ± 12.88 and 44.8 ± 3.78 mg/L in turn. The OLR1 influent TN, TP concentrations were respectively 47.9 ± 2.11 and 3.6 ± 0.15 mg/L; the effluent TN, TP concentration were 14.9 ± 0.18 and 2.2 ± 0.06 mg/L, respectively. The study suggests that the effluent is within the allowable limits of National technical regulation on domestic wastewater (Column B1), indicating the applicability of S-MBBR for the domestic wastewater treatment plant.

scholarly journals Impact of Operational Parameters on Bacterial Community in a Full-Scale Municipal Wastewater Treatment Plant

2012 ◽  
Vol 61 (1) ◽  
pp. 41-49 ◽  
Author(s):  
AGNIESZKA CYDZIK-KWIATKOWSKA ◽  
MAGDALENA ZIELIŃSKA ◽  
IRENA WOJNOWSKA-BARYŁA
Keyword(s):  
Wastewater Treatment ◽  
Bacterial Community ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Organic Load ◽  
Municipal Wastewater Treatment ◽  
Load Rate ◽  
Organic Load Rate ◽  
Ammonia Oxidising Bacteria

A bacterial community in activated sludge from a full-scale municipal wastewater treatment plant was monitored throughout the year with the use of FISH, RISA and DGGE techniques. In the investigated range of temperatures (11.9-21.6 degrees C), a rise in temperature resulted in a lower total bacteria richness, while organic load rate changes from 0.09 to 0.21 g COD x g TSS(-1) x d(-1) were positively correlated with the number of bands in RISA patterns. The most diverse pattern (29 different bands) was characteristic for the activated sludge sample collected at the end of January at wastewater temperature of 11.9 degrees C. The ammonia-oxidising bacteria community did not change during the study, and comprised of 4 different bacterial populations with one dominant species closely related to Nitrosospira sp. REGAU (GenBank accession number AY635572.1). The percentage of ammonia-oxidising bacteria in the activated sludge varied from 6.2 to 19.5% and depended on temperature (R = 0.61, p = 0:02) and organic load rate (R = -0.55, p = 0.04).

Combined oxidative and biological treatment of separated streams of tannery wastewater

2004 ◽  
Vol 49 (4) ◽  
pp. 287-292 ◽  
Author(s):  
G. Vidal ◽  
J. Nieto ◽  
H.D. Mansilla ◽  
C. Bornhardt
Keyword(s):  
Organic Matter ◽  
Industrial Wastewater ◽  
Biological Treatment ◽  
Advanced Oxidation Process ◽  
Treated Wastewater ◽  
Organic Load ◽  
Tannery Effluent ◽  
Organic Matter Removal ◽  
Significant Toxicity ◽  
High Concentrations

Leather tanning effluents are a source of severe environmental impacts. In particular, the unhairing stage, belonging to the beamhouse processes, generates an alkaline wastewater with high concentrations of organic matter, sulphides, suspended solids, and salts, which shows significant toxicity. The objective of this work was to evaluate the biodegradation of this industrial wastewater by combined oxidative and biological treatments. An advanced oxidation process (AOP) with Fenton's reagent was used as batch pretreatment. The relationships of H2O2/Fe2+ and H2O2/COD were 9 and 4, respectively, reaching an organic matter removal of about 90%. Subsequently, the oxidised beamhouse effluent was fed to an activated sludge system, at increasing organic load rates (OLR), in the range of 0.4 to 1.6 g COD/Láday. The biological organic matter removal of the pre-treated wastewater ranged between 35% and 60% for COD, and from 60% to 70% for BOD. Therefore, sequential AOP pretreatment and biological aerobic treatment increased the overall COD removal up to 96%, compared to 60% without pretreatment. Bioassays with D. magna and D. pulex showed that this kind of treatment achieves only a partial toxicity removal of the tannery effluent.

scholarly journals Treatment of Iraqi Municipal Wastewater by up-flow Anaerobic Sludge Blanket Reactor UASB

2021 ◽  
Vol 39 (1A) ◽  
pp. 130-136
Author(s):  
Khairi R. Kalash ◽  
Majid A. Dixon ◽  
Hussein IR. Sultan ◽  
Raad A. Ali
Keyword(s):  
Volatile Fatty Acids ◽  
Municipal Wastewater ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Organic Load ◽  
Anaerobic Sludge ◽  
Treated Effluent ◽  
Load Rate ◽  
Anaerobic Sludge Blanket ◽  
Organic Load Rate

In this work, the Upflow Anaerobic Sludge Blanket “UASB” reactor treated effluent wastewater to investigate the process performance on a pilot plant scale. Municipal wastewater at high and medium strength with different organic load rate OLR (0.6-9) kg COD m-3day-1 with the flow of 20 l/h, up-flow velocity 0.4 m/h, hydraulic retention time HRT 9 h at a temperature of (20-30 ºC) was evaluated. The wastewater concentration, including TSS, COD was measured, and the removal efficiencies of chemical oxygen demand (COD) and total suspended solid TSS were calculated and summarized as 45-85% and 70-75%, respectively, depending on organic load rate OLR. Effluent volatile fatty acids VFA was measured, and the results were in the range between 12-90 mg/L depending on OLR with a slight change in pH (8.3-8.4), which means the conversion of COD to methane and increase ammonia concentration.

Storage of biodegradable polymers by an enriched microbial community in a sequencing batch reactor operated at high organic load rate

2005 ◽  
Vol 80 (11) ◽  
pp. 1306-1318 ◽  
Author(s):  
Davide Dionisi ◽  
Mario Beccari ◽  
Simona Di Gregorio ◽  
Mauro Majone ◽  
Marco Petrangeli Papini ◽  
...  
Keyword(s):  
Microbial Community ◽  
Biodegradable Polymers ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Organic Load ◽  
Load Rate ◽  
Organic Load Rate
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