A comparison of anaerobic 2, 4-dichlorophenoxy acetic acid degradation in single-fed and sequencing batch reactor systems

3rd International Conference on Water Resource and Environment

地球科学;生态环境科学

Elefsiniotis, P.^1 ; Wareham, D.G.^2 ; Fongsatitukul, P.^1

Department of Sanitary Engineering, Mahidol University, 420/1 Ratchavithee Road, Ratchathevee, Bangkok

10400, Thailand^1

Department of Civil and Natural Resources Engineering, University of Canterbury, Private Bag 4800, Christchurch, New Zealand^2

关键词: 2 ,4-D degradation;    Acid degradation;    Fed batch reactor;    Hydraulic retention time;    Industrial strength;    Liquid volume;    Sequencing batch reactor systems;    Sequencing batch reactors;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/82/1/012004/pdf
DOI  :  10.1088/1755-1315/82/1/012004

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper compares the practical limits of 2, 4-dichlorophenoxy acetic acid (2,4-D) degradation that can be obtained in two laboratory-scale anaerobic digestion systems; namely, a sequencing batch reactor (SBR) and a single-fed batch reactor (SFBR) system. The comparison involved synthesizing a decade of research conducted by the lead author and drawing summative conclusions about the ability of each system to accommodate industrial-strength concentrations of 2,4-D. In the main, 2 L liquid volume anaerobic SBRs were used with glucose as a supplemental carbon source for both acid-phase and two-phase conditions. Volatile fatty acids however were used as a supplemental carbon source for the methanogenic SBRs. The anaerobic SBRs were operated at an hydraulic retention time of 48 hours, while being subjected to increasing concentrations of 2,4-D. The SBRs were able to degrade between 130 and 180 mg/L of 2,4-D depending upon whether they were operated in the acid-phase or two-phase regime. The methanogenic-only phase did not achieve 2,4-D degradation however this was primarily attributed to difficulties with obtaining a sufficiently long SRT. For the two-phase SFBR system, 3.5 L liquid-volume digesters were used and no difficulty was experienced with degrading 100 % of the 2,4-D concentration applied (300 mg/L).