Nitrogen removal from activated sludge process (ASP) treated municipal wastewater by biofilm channeling

Autor:	Chen-Lung Hsu, Huahn‐Tyng Weng, C. F. Ouyang
Rok vydání:	2001
Předmět:	Denitrification Chemistry Water flow General Engineering Biofilm Environmental engineering chemistry.chemical_element biochemical phenomena metabolism and nutrition Nitrogen Anoxic waters Activated sludge Environmental chemistry Nitrification Kjeldahl method
Zdroj:	Journal of the Chinese Institute of Engineers. 24:595-600
ISSN:	2158-7299 0253-3839
DOI:	10.1080/02533839.2001.9670655
Popis:	The pathways and kinetic behaviors of nitrogen compounds have been examined in biofilm channeling for the purification of wastewa‐ter treated by the activated sludge process (ASP) under laminar and turbulent flow conditions. The continuous water flow experiments show that the flow velocity will significantly influence the nitrification and denitrification conversion rates. The optimal total Kjeldahl nitrogen (TKN‐N) and total nitrogen (TN‐N) removal rates can be achieved during the initial turbulent flow condition. Concentrations of TKN‐N and TN‐N variations in the biofilm channel follow zero order kinetics. In our 54‐m biofilm channel, pathways of nitrogen compound conversions demonstrate that trapped suspended solids in the biofilm form an anoxic environment and are hydrolyzed to produce a carbon source, which may be the main reason for the occurrence of denitrification. The nitrification and denitrification processes occur simultaneously in the biofilm channel.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4a7b8939f2062d0a554e4af957c7adf1 https://doi.org/10.1080/02533839.2001.9670655 Zobrazit plný text záznamu