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- W2192908870 abstract "During the last decade, groundwater contamination became an important challenge to overcome. Thedomestic wastewater disposal in soil is pointed out as an important nitrate contamination source in manyareas in North America. Also, many states and provinces are revising their regulation to introduce adischarge requirement of total nitrogen (NT), often set at less than 10 mg/L. Considering theseenvironmental requirements, the need of denitrification systems is growing rapidly. Presently, fewsystems on the market can reach a total nitrogen reduction of over 65%, which corresponds to aneffluent concentration between 15 to 20 mg NT/L (based on 50 mg NT/L septic tank effluent). Most ofthese systems include an integrated primary treatment and/or a secondary treatment stage. This paperpresents the results obtained in the development of a denitrification unit installed between a conventionalseptic tank and an EcofloâPeat-based Biofilter. The design chosen is based on a tank including ananoxic section with short residence time and a nitrifying section using a new synthetic and organic filteringmedium designed to support high hydraulic rates. This system demonstrated a nitrification percentageover 95% and a denitrification percentage varying between 65 to 90% which globally corresponds to65% NT removal. The scale of the bench test might explain the lower percentage in total nitrogenremoval than theoretically expected (70%). A full scale system is actually operating to verify thishypothesis. The effluent of the denitrification unit easily meets the secondary treatment standards. Withthe addition of a peat biofiltration system the effluent reached a tertiary treatment standards (< 5 mg/L ofCBOD5, < 5 mg/L of TSS and < 100 CFU/100 mL)." @default.
- W2192908870 created "2016-06-24" @default.
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- W2192908870 date "2013-11-14" @default.
- W2192908870 modified "2023-09-24" @default.
- W2192908870 title "A DENITRIFICATION PROCESS BASED ON A NEW FILTERING MEDIA FOR ONSITE WASTEWATER TREATMENT" @default.
- W2192908870 doi "https://doi.org/10.13031/2013.6032" @default.
- W2192908870 hasPublicationYear "2013" @default.
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