JIAXuchao,ZOULei,FANXuehong,et al.Optimization of Process Parameters and Selection of Filter Media for High-speed Filter[J].China Water & Wastewater,2026,42(9):9-17.
Optimization of Process Parameters and Selection of Filter Media for High-speed Filter
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第9期
Page:
9-17
Column:
Date of publication:
2026-05-01
- Keywords:
- high-speed filtration; pilot test; filtration rate; backwashing parameter; filtration cycle; filter media
- Abstract:
- To address the challenges such as land scarcity and a lack of technical guidance on the high-speed filtration process in the upgrading and reconstruction of a large-scale wastewater treatment plant in Wuhan, a pilot-scale test was conducted based on the plant. The study systematically evaluated the impacts of different filtration rates, backwashing parameters (intensity and duration of air washing, water washing and air-water mixed washing), and filtration cycles.It also compared the removal performance of three types of filter media (porcelain sand, quartz sand and a new type of micro-crystalline ceramic), and proposed the optimal operating parameters and filter media type for high-speed filter. The results showed that the optimal design filtration rate for filter columns 1# to 3# was uniformly 13 m/h. Their optimal air washing intensity was 12 L/(m2·s), 12 L/(m2·s), and 10 L/(m2·s) respectively, with a consistent optimal air washing duration of 3 min; the optimal water washing intensity was 12 L/(m2·s), 10 L/(m2·s),and 8 L/(m2·s) respectively, with a uniform optimal water washing duration of 8 min; and the optimal filtration cycles were 48 h, 48 h, and 12 h respectively. Notably, filter column 2# was equipped with an air-water mixed washing stage, for which the optimal mixed washing intensity and duration were 10 L/(m2·s) for air washing combined with 2 L/(m2·s) for water washing and 2 min, respectively.Under the above-mentioned optimal operating parameters, the average turbidity removal rates of filter columns 1# to 3# reached 86.95%, 90.66% and 91.61% respectively, while the COD removal rates were 46.08%, 38.97% and 23.08%, respectively. When focusing on the turbidity index, quartz sand filter media was determined to be the most suitable option after a comprehensive consideration of removal efficiency, backwashing water consumption and equipment energy consumption.
Last Update:
2026-05-01