Anaerobic Treatment of a Petrochemical Wastewater from a Terephthalic Acid Plant

1992 ◽  
Vol 25 (7) ◽  
pp. 223-235 ◽  
Author(s):  
H. Macarie ◽  
A. Noyola ◽  
J. P. Guyot
Keyword(s):  
Activated Sludge ◽  
Terephthalic Acid ◽  
Treatment Plant ◽  
Tubular Reactor ◽  
Anaerobic Treatment ◽  
Cod Removal ◽  
Acid Plant ◽  
Aerobic Process ◽  
Fixed Film ◽  
Film Reactor

Anaerobic treatment of terephthalic acid plant wastewater was tested using two UASB reactors (T and U) and a downflow tubular fixed film reactor. UASB T was inoculated with sludge sampled from an anaerobic stabilization pond receiving waste activated sludge from a petrochemical industry treatment plant. UASB U and the fixed film reactor were inoculated with anaerobically adapted activated sludge from a municipal plant. Raw effluent had to be settled and neutralized before reactor feeding. Sedimentation resulted in 70% TSS and 37% COD removal. UASB digesters presented comparable treatment efficiencies with rather low COD removals: the best results were 46.4% for UASB T at 2.6 kg COD/m3.d and a hydraulic retention time (θ) of 2.7 days and 43.9% for UASB U at 2.2 kg COD/m3.d and θ of 3.2 days. The performance of the tubular reactor was much higher, 74.5% COD removal at 1.89 kg/m3.d and θ of 3.4 days. The better efficiencies of this last digester are explained mainly by a higher VSS content and a better resistance to toxicity caused by the aromatics present in the wastewater. A primary settling-anaerobic-aerobic process is proposed as an alternative to the conventional aerobic process for treating terephthalic wastewater, but disposal of solids from primary sedimentation and cost of neutralization have to be considered before application.

Pond Treatment of Rettery Wastewaters

1987 ◽  
Vol 19 (12) ◽  
pp. 79-83
Author(s):  
K. Bartoszewski ◽  
A. Bilyk
Keyword(s):  
Activated Sludge ◽  
Treatment Process ◽  
New Technology ◽  
Treatment Plant ◽  
Anaerobic Treatment ◽  
Cod Removal ◽  
Experimental Results ◽  
Aerobic Conditions ◽  
Aerobic Stabilization ◽  
In Series

Rettery wastewaters were treated in anaerobic and aerobic ponds. Anaerobic treatment yielded efficiencies of BOD5 and COD removal as low as 20%. The treatment process conducted under aerobic conditions in aerated and stabilizing ponds arranged in series took from 18 to 20 days and gave efficiencies of BOD5 and COD removal amounting to 90%. The experimental results were interpreted by virtue of the Eckenfelder equation. Excess activated sludge was subjected to aerobic stabilization in a separate tank. A new technology was suggested for the existing obsolete industrial treatment plant.

scholarly journals Treatment of terephthalic acid plant wastewater with an anaerobic fixed film reactor

1990 ◽  
Vol 11 (3) ◽  
pp. 239-248 ◽  
Author(s):  
A. Noyola ◽  
H. Macarie ◽  
J. P. Guyot
Keyword(s):  
Terephthalic Acid ◽  
Acid Plant ◽  
Fixed Film ◽  
Film Reactor

Anaerobic treatment of a municipal landfill leachate

1997 ◽  
Vol 43 (10) ◽  
pp. 937-944 ◽  
Author(s):  
Jean-Claude Frigon ◽  
Jean-Guy Bisaillon ◽  
Gilles Paquette ◽  
Réjean Beaudet
Keyword(s):  
Landfill Leachate ◽  
Growth Parameters ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Cod Removal ◽  
Organic Loading Rate ◽  
Oil And Grease ◽  
Municipal Landfill ◽  
Fixed Film ◽  
Film Reactor

Leachate from a municipal landfill site was treated in a laboratory using fixed-film cultures under anaerobic conditions. Serum-bottle cultures were used for optimization of the growth parameters. The reduction of the chemical oxygen demand (COD) of the leachate was faster at 29 °C compared with lower temperatures. Gradual acclimation of the microbial population to temperatures as low as 4 °C considerably increased the rate of COD removal at these temperatures. Addition of supplements to the leachate was not needed and it was not necessary to adjust the pH (5.9) for optimal COD reduction. Continuously fed reactors were also used to treat the leachate. The maximum organic loading rate of the reactor at 22 °C to obtain 85% COD removal was 2.1 kg COD∙m−3∙day−1, which corresponded to an hydraulic retention time of 1.5 days. After treatment under these conditions, the toxicity (Microtox method) of the leachate was completely eliminated and the required quality standards were met for iron, oil and grease, and phenols. The fermentative microorganisms in the biofilm of the reactor were evaluated to 4.6 × 107cells∙cm−2and identified as Streptococcus gallinarum, Clostridium glycolicum, Clostridium bifermentans or sadallii, Citrobacter amalonaticus, Bacteroides capillosus, and Eubacterium sp.Key words: anaerobic treatment, landfill, leachate, growth parameters, fixed-film reactor, microbiology.

Anaerobic Treatment of Polyethylene Terephthalate (PET) Wastewater from Lab to Full Scale

1999 ◽  
Vol 40 (8) ◽  
pp. 229-236 ◽  
Author(s):  
F. Fdz-Polanco ◽  
M. D. Hidalgo ◽  
M. Fdz-Polanco ◽  
P. A. García Encina
Keyword(s):  
Polyethylene Terephthalate ◽  
Loading Rate ◽  
Treatment Plant ◽  
Textile Wastewater ◽  
Anaerobic Treatment ◽  
Cod Removal ◽  
Organic Loading Rate ◽  
Foam Formation ◽  
Organic Loading ◽  
Start Up

In the last decade Polyethylene Terephthalate (PET) production is growing. The wastewater of the “Catalana de Polimers” factory in Barcelona (Spain) has two main streams of similar flow rate, esterification (COD=30,000 mg/l) and textile (COD=4000 mg/l). In order to assess the anaerobic treatment viability, discontinuous and continuous experiments were carried out. Discontinuous biodegradability tests indicated that anaerobic biodegradability was 90 and 75% for esterification and textile wastewater. The textile stream revealed some tendency to foam formation and inhibitory effects. Nutrients, micronutrients and alkali limitations and dosage were determined. A continuous lab-scale UASB reactor was able to treat a mixture of 50% (v) esterification/textile wastewater with stable behaviour at organic loading rate larger than 12 g COD/l.d (0.3 g COD/g VSS.d) with COD removal efficiency greater than 90%. The start-up period was very short and the recuperation after overloading accidents was quite fast, in spite of the wash-out of solids. From the laboratory information an industrial treatment plant was designed and built, during the start-up period COD removal efficiencies larger than 90% and organic loading rate of 0.6 kg COD/kg VSS.d (5 kg COD/m3.d) have been reached.

Phosphate requirement for anaerobic fixed film treatment of landfill leachate

1988 ◽  
Vol 15 (3) ◽  
pp. 334-347 ◽  
Author(s):  
Dhandapani Thirumurthi ◽  
Glenn Robert Groskopf
Keyword(s):  
Anaerobic Treatment ◽  
Organic Phosphate ◽  
Phase Iii ◽  
Laboratory Model ◽  
P Value ◽  
Leachate Treatment ◽  
Condensed Phosphate ◽  
A Value ◽  
Fixed Film ◽  
Film Reactor

Three laboratory model anaerobic fixed film reactors, AFFR-A, B, and C, fed by a pretreated leachate, were monitored at 35 ± 5 °C for 10 months to estimate the effects of different concentrations and the forms of phosphate (ortho, organic, or condensed) on performances at 1.2–1.8 g COD/(d∙L) of reactor volume. Ortho phosphate (Na3PO4) supplement was added to the feed of AFFR-A, organic phosphate (sodium glycerophosphate: C3H7Na2O6P∙5H2O) to AFFR-B, and condensed phosphate (Na4P2O7) to AFFR-C at a feed COD/P value of about 6100 for 23 weeks (Phase I). When no PO4 deficiency was observed, the value was increased to 7700 in reactors A and B, but the PO4 supplement was terminated for reactor C, resulting in a value of 64 300 (Phase II). The average COD of C effluent was 599 mg/L as compared to 451 and 442 mg/L for reactors A and B, respectively, suggesting that a COD/P of 64 300 was too high. During Phase III, the COD/P ratios were changed in reactors A, B, and C, respectively, to 10 200, 15 200, and 34 300. The results indicate that the "optimal" ratio of COD/P lies perhaps between 15 000 and 34 300. Anaerobes did not prefer any one form of PO4 over the other two. Key words: anaerobic treatment, phosphate requirement, ortho phosphate, condensed phosphate, organic phosphate, leachate treatment, fixed film reactor.

Treatment of Surplus Activated Sludge from the Emscher Mouth Treatment Plant, F.R.G.

1984 ◽  
Vol 16 (12) ◽  
pp. 357-363
Author(s):  
H J Dönges ◽  
K H Kalbskopf
Keyword(s):  
Heat Treatment ◽  
Activated Sludge ◽  
Pilot Plant ◽  
Treatment Plant ◽  
Anaerobic Treatment

At the IAWPRC Workshop in Vienna in 1971, a report was aiven on pilot plant tests carried out in respect of heat treatment and subsequent dewatering of activated surplus sludge, as well as on the anaerobic treatment of the filtrate liquor yielded, for the planned Emscher Mouth Treatment Plant. After more than five years of onerational experience the results achieved with this plant are now renorted.

Full-scale evaluation of an integrated fixed-film activated sludge (IFAS) process for enhanced nitrogen removal

1996 ◽  
Vol 33 (12) ◽  
pp. 155-162 ◽  
Author(s):  
Clifford W. Randall ◽  
Dipankar Sen
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Plug Flow ◽  
Treatment Plant ◽  
Nitrification Rate ◽  
A Value ◽  
Fixed Film ◽  
Control Section ◽  
The Media ◽  
Retrofit Design

One of the two trains of the 37,000 m3/d Annapolis, Maryland step aeration activated sludge treatment plant was modified for single-sludge anoxic-aerobic operation, and then fixed-film media were integrated into the aerobic zone to enhance nitrification. Rope-like Ringlace media was selected for integration, and 30,000 meters were installed in a volume of 475 m3 for a pilot demonstration. The purpose of the integrated fixed-film media was to upgrade the short hydraulic retention time (HRT) basin (6 hrs nominal) for efficient, year-round nitrogen removal without construction to increase basin volume. An engineering study had concluded that upgrading the facility for year round complete nitrification, without nitrogen removal, would cost US$24 million. The modified train was operated for 12 months, six in the plug-flow MLE configuration, and six in a step-feed configuration. The integrated Ringlace media increased the nitrification rate per unit volume to 225% of that observed in the control section, attaining a value of 1.75 kg/d NH3-N per linear meter at 15°C. The media also increased denitrification in the aerobic media section to the extent that between 30 and 88% of the nitrates formed in the section were denitrified within it, permitting a potential 25% or more reduction in the volume of the anoxic zone. An IFAS retrofit design was developed which incorporated step-feed operation, and reduced the projected construction cost to US$9.2 million.

Anaerobic treatment of beet waste in a stationary fixed-film reactor

1986 ◽  
Vol 17 (3) ◽  
pp. 175-187 ◽  
Author(s):  
M.F. Hamoda ◽  
K.J. Kennedy
Keyword(s):  
Anaerobic Treatment ◽  
Fixed Film ◽  
Film Reactor

scholarly journals Efficiency studies of modified IFAS-OSA system upgraded by an anoxic sludge holding tank

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mansour Fazelipour ◽  
Afshin Takdastan ◽  
Seyed Mehdi Borghei ◽  
Neda Kiasat ◽  
Marcin Glodniok ◽  
...  
Keyword(s):  
Control System ◽  
Activated Sludge ◽  
Removal Efficiency ◽  
Biomass Yield ◽  
New Technology ◽  
Cod Removal ◽  
Yield Coefficient ◽  
Excess Sludge ◽  
Fixed Film ◽  
P Removal

AbstractAn upgraded integrated fixed-film activated sludge-oxic settling anoxic (IFAS-OSA) system is a new technology for reducing nutrients and excess sludge. The results showed that the average TN removal efficiency of the IFAS-OSA system was gradually increased up to 7.5%, while the PO4–3-P removal efficiency increased up-to 27%, compared with that of the IFAS system. The COD removal efficiency of the IFAS-OSA system was slightly increased up-to 5.4% and TSS removal efficiency increased up to 10.5% compared with the control system. Biomass yield coefficient (Yobs) in the IFAS and IFAS-OSA systems were 0.44 and 0.24 (gr MLSS/ gr COD). Hence, sludge production decreased by 45%. The average SVI was decreased by 48% in IFAS-OSA system compared with IFAS. This study demonstrated the better performance of the IFAS-OSA system compared to that of the IFAS system.

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