Application of the central composite design and response surface methodology for the treatment of Kermanshah landfill leachate by a sequencing batch reactor

作者：Mousavi Seyyed Alireza^*; Almasi Ali; Kamari Zohreh; Abdali Farzaneh; Yosefi Zhaleh

来源：Desalination and Water Treatment, 2015, 56(3): 622-628.

DOI：10.1080/19443994.2014.938302

• Landfill leachate
• Kermanshah
• Aerobic treatment
• SBR reactor
• CCD

The objective of this paper is to investigate the COD removal efficiency of the Kermanshah landfill leachate by applying the aerobic sequencing batch reactor (ASBR). The ASBR was operated to investigate the COD removal efficiency at the various hydraulic retention time (HRT) and COD concentrations. In order to study the effects of COD concentration and HRT based on response surface methodology at three-level, two-variable central composite design of experiments were used. The results showed that the leachate could be effectively treated with 90% of COD removal at the lowest COD concentration (16,000mg/L) in influent. The removal efficiency decreased gradually down to 30.9% when COD increased to 48,000mg/L. The system has strong tolerance to organic shock loading in this experiment. The five suggested models based on the mentioned variables were applied to predict the response values. The value of the HRT, as important variables, showed that efficiency of reactor decreased from 70 to 50%, when the HRT decreased from 6 to 2d. This study contributed to a better understanding of the function of HRT and COD concentration in the system.

• 出版日期2015-10-16