Treatment of 1,4-Dioxane in Groundwater Using Advanced Oxidation Processes: UV/H2O2, O3/H2O2, and UV/TiO2
使用高级氧化工艺处理地下水中的1,4-二恶烷:UV/H2O2、O3/H2O2和UV/TiO2
This slide presentation outlines a project where, in 2004, the Regional Municipality of Waterloo (RMOW) shut down its Greenbrook Water Treatment Plant when 1,4-dioxane was found in well supply up to
285 ppb. Associated Engineering was hired to conduct a
Treatability Study that included a
Literature Review,
Bench-Scale Study, and
a Pilot-Scale Study. Objectives of the Pilot-Scale Tests included:
demonstrate 1,4-dioxane destruction with 3 advanced oxidation processes (AOPs) and
their suitability at Greenbrook:
UV / H2O2;
O3 / H2O2;
UV / TiO2;
O3 dosing control (O3 / H2O2 only);
monitor bromate formation, if any; confirm improvement with upstream
filtration;
examine level of Fe / Mn removal
through AOP; and,
determine H2O2 residual for future
quenching considerations. Raw water quality considerations and pilot process train are outlined along with the pilot study summary that includes: filtration process
confirmed Fe/Mn removal;
minimal improvement for downstream AOP;
1,4-Dioxane removal and byproduct
formation; and,
all AOPs tested were able to meet low target
dioxane levels (< 10 µg/L) without forming
high levels of bromate.