Pilot plant study on ozonation and biological activated carbon process for drinking water treatment

Article type: Research Article

Authors: KONG, Ling-yu | ZHANG, Xiao-jian | WANG, Zhan-sheng

Affiliations: Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China

Note: [] Corresponding author. E-mail: [email protected]

Abstract: A study on advanced drinking water treatment was conducted in a pilot scale plant taking water from conventional treatment process. Ozonation-biological activated carbon process (O_3-BAC) and granular activated carbon process (GAC) were evaluated based on the following parameters: COD_{Mn}, UV_{254}, total organic carbon (TOC), assimilable organic carbon (AOC) and biodegradable dissolved organic carbon (BDOC). In this test, the average removal rates of COD_{Mn}, UV_{254} and TOC in O_3-BAC were 18.2%, 9.0% and 10.2% higher on (AOC) than in GAC, respectively. Ozonation increased 19.3–57.6 μg Acetate-C/L in AOC-P17, 45.6–130.6μg Acetate-C/L in AOC-NOX and 0.1–0.5 mg/L in BDOC with ozone doses of 2–8 mg/L. The optimum ozone dose for maximum AOC formation was 3 mgO_3/L. BAC filtration was effective process to improve biostability.

Keywords: ozonation, biological activated carbon, COD[TeX:] _{Mn}, UV[TeX:] _{254}, TOC, AOC, BDOC, biostability

Journal: Journal of Environmental Sciences, vol. 18, no. 2, pp. 232-235, 2006