Lu, Jason T. creator Chongrak Polprasert Chairperson Ahn, Kyu-Hong Examination Committee Tran, Francis T. Examination Committee The Canadian International Development Agency (CIDA) Scholarship Donor text th Bangkok Asian Institute of Technology 1989 continuing eng 82 leaves : ill. Laboratory-scale a nd pilot-scale studies were conducted to evaluate the efficiencies of AGWSP {Attached-Growth Waste Stabilization Pond) and WSP {Waste Stabilization Pond ) in treating phenolic wastewater. Continuous loading as well as one-day shock loading at various levels of influent phenol concentrations were made in the laboratory-scale stud y. Experimental results obtained in t h is research revealed that at steady- state conditions, more than 93 % soluble chemical oxygen demand {SCOD) removal efficiency was achieved at influent phenol concentrations of 100, 200 and 300 mg/L. Moreover, at 400 mg/L and 500 mg/L of influent phenol concentrations 87.8 % and 93.0 % were attained in the AGWSP un its, respectively . On e-day shock loadings at 100 and 300 mg/L of influent phenol concentrations resulted in average SCOD removal efficiencies of 94.8 % and 96.0 %, respectively. The phenol s hock loadings of 100 and 300 mg/L administered to the pilot-scale units for one day resulted in average SCOD reductions of about 95.0% and 96.2%, respectively, during the steady-state conditions. The AGWSP was found to be more resistant to one-day influent phenol shock loading compared to WSP . Albeit, there appeared to be no significant difference in treatment efficiency between the AGWSP and the WSP units when phenol was continuously fed under the experimental conditions employed in this study. Thesis (M.Eng.) - Asian Institute of Technology, 1989 Sewage lagoons Sewage Purification Phenol removal Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B17962 http://203.159.5.9/ait-thesis/detail.php?q=B17962 120399 20260818171756.0