The impact of fractionation of hydraulic load on oxidation performances of sand filters

Journal of Water Reuse and Desalination

Gueddari, Moncef¹  Bali, Mahmoud² 

[1] Faculty of Sciences, Department of Geology, University of Tunis El Manar, Tunis, Tunisia;Higher Institute of Water Sciences and Techniques, University of Gabès, Gabès, Tunisia

关键词: fractionation;    hydraulic load;    impact;    infiltration–percolation;    oxidation;    performances;   

DOI  :  10.2166/wrd.2015.066

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

Infiltration–percolation is an extensive treatment technique aimed at eliminating organic matter, oxidizing nitrogen, and removing pathogens. The main purpose of this work is to evaluate the impact of fractionation of hydraulic load on oxidation performances of unsaturated sand filters. Experimental results showed that oxidation of organic matter and ammonium nitrogen has mainly occurred in the upper layers of the filter bed. They also showed that treatment efficiency increased with the increase of the thickness of the filtering mass and the fractionation of applied hydraulic load. The experiments pointed out the influence of the fractionation of daily load on oxidation capacity of the intermittent sand filter. Results showed that increasing the fractionation improves the purification capacity of the treatment process. The simulations showed that biomass growth is very sensitive to the fractionation of hydraulic load, and that the increase of the number of feeding–drainage cycles per day leads to accumulate purifying biomass in the upper layers of unsaturated filters.

【 授权许可】

CC BY-NC-ND