Comparison of anaerobic acrylic acid biotransformation in single- and two-stage pH-stat completely stirred tank reactor systems

Date

2000-01-01

Author

Demirer, Göksel Niyazi
Speece, RE

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

256
views

0
downloads

Performance of single- and two-stage pH-stat completely stirred tank reactor (CSTR) systems for anaerobic acrylic acid biotransformation was investigated and compared. In the experiments, acetate was added with acrylic acid. Acetate concentration in both single- and two-stage reactors was continuously maintained at a nonlimiting concentration of 2000 +/- 200 mg/L. using a computer-controlled pH-stat system to allow observation of the effect of acrylate biotransformation on the more sensitive methanogenic step. For this purpose, conventional (one-stage) and two-stage pi-I-stat CSTR systems with the same acrylic acid loading strategy were operated under the same conditions, and their performances were compared. The food-to-microorganism ratio in the first stage of the two-stage system was maintained at approximately two times that of the one-stage system. Furthermore. relatively high acrylate concentrations and dilution rates were achieved in the first stage of the two-stage system. Results revealed that the two-stage pH-stat CSTR system provided better effluent quality and more stable operation with the toxic effects of acrylic acid and its intermediate products than the single-stage system.

Subject Keywords

Water Science and Technology, Environmental Chemistry, General Medicine

URI

https://hdl.handle.net/11511/57361

Journal

WATER ENVIRONMENT RESEARCH

DOI

https://doi.org/10.2175/106143000x137149

Collections

Department of Environmental Engineering, Article

Suggestions

OpenMETU
Core

Anaerobic-Fed and Sequencing-Batch Treatment of Sugar-Beet Processing Wastes: A Comparative Study Alkaya, Emrah; Demirer, Göksel Niyazi (Wiley, 2011-03-01) The aim of this study was to compare a batch-fed continuously mixed anaerobic reactor (FCMR) with an anaerobic sequencing batch reactor (ASBR), in terms of waste stabilization and methane production treating sugar-beet processing wastewater and beet-pulp simultaneously. A reactor was operated as FCMR, which then was operated as an ASBR by changing operational conditions after the steady-state was reached. Although the hydraulic retention time value of the ASBR configuration was lower (8 days) than that of t...
Comparison of TOC concentrations by persulphate UV and high temperature catalytic oxidation techniques in the Marmara and Black Seas Tuğrul, Süleyman (Elsevier BV, 1993-01-01) Total organic carbon (TOC) concentrations were determined in the Marmara Sea and both oxic and anoxic waters of the Black Sea, using the Shimadzu high-temperature catalytic oxidation technique and the Technicon persulphate-UV oxidation method. The TOC values in the deep waters of the Marmara Sea ranged between 60 and 73 μ MC by the Shimadzu technique and from 40 to 50 μMC by the Technicon method. The TOC values obtained by both methods in the deep anoxic waters of the Black Sea varied between 105 and 130 μM...
Modeling of catalytic ozonation process in a three-phase reactor Erol, Funda; Oezbelge, Tuelay A.; Oezbelge, H. Oender (Informa UK Limited, 2009-01-01) In this research, the main objective was to determine the flow characteristics of a three-phase reactor in order to use this knowledge in the modeling of catalytic ozonation of aqueous dye solutions. Therefore, the stimulus-response method was used in the tracer experiments; thus, the degree of liquid mixing in the reactor was estimated by means of residence time distribution, Peclet number and axial dispersion coefficient in the presence and the absence of the catalyst. Experimental data were obtained by p...
A comparison of physical properties of synthetic sludge with activated sludge Sanin, Faika Dilek (Wiley, 1999-03-01) Conducting physical and chemical tests with activated sludge is difficult because of its constantly changing properties. To overcome this difficulty a synthetic sludge that physically and chemically resembles activated sludge was created. In this study, the physical properties of synthetic sludge were examined and compared to those of activated sludge, including particle size, filterability by specific resistance to filtration and capillary suction time, conditioning with two polyelectrolytes, flee strength...
Modification of a Conventional Anaerobic Digester for Improving the Effluent and Sludge Characteristics Uludag-Demirer, S.; Demirer, Göksel Niyazi; Othman, M. (Wiley, 2009-12-01) The aim of this study was to enrich the composition of anaerobic digester sludge in terms of nitrogen and phosphorus by struvite (MgNH4PO4) formation. Waste activated sludge was anaerobically digested in batch reactors under the conditions that the minimum stoichiometric requirement for struvite formation was satisfied in all reactors. For this purpose, different amounts of magnesium (Mg2+) and phosphate (PO43-) ions were added initially to the batch reactors. The results showed the effects of adding Mg2+ a...

Citation Formats

G. N. Demirer and R. Speece, “Comparison of anaerobic acrylic acid biotransformation in single- and two-stage pH-stat completely stirred tank reactor systems,” WATER ENVIRONMENT RESEARCH, pp. 84–89, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57361.