Nitrogen and phosphorus removal in an anaerobic (UASB)-aerobic (ABF) sewage treatment system

Autor:	Hang-Bae Jun, Hyun-Sook Lim, Dong-Jie Tian, Jin Chung
Rok vydání:	2015
Předmět:	Denitrification Waste management Alum Phosphorus chemistry.chemical_element Ocean Engineering Pulp and paper industry Pollution Nitrogen chemistry.chemical_compound chemistry Biofilter Sewage treatment Aeration Effluent Water Science and Technology
Zdroj:	Desalination and Water Treatment. 53:2856-2865
ISSN:	1944-3986 1944-3994
DOI:	10.1080/19443994.2014.993209
Popis:	Anaerobic sewage treatment process using upflow anaerobic sludge blanket (UASB) coupled with aerated biofilter (ABF) was tested for the removal of nitrogen and phosphorus by recycling the final effluent and by adding alum to the influent. TCOD Removal efficiency was about 60% in UASB without recycling of the ABF effluent, while it increased to 90% at recycling ratio of 3. Complete denitrification had occurred in the UASB, and removal efficiencies of both total nitrogen (TN) and -N were also improved to 74 and 96%, respectively, by recycling the nitrified ABF effluent. Total phosphorus (TP) removal was not improved by recycling of the ABF effluent. TP and soluble phosphorus were effectively removed in UASB by adding alum to the influent. 90% removal of TP was possible with alum dose at Al/P mole ratio of 2.6. In the final effluent, concentrations of TCOD, TN, and TP were below 14.0, 7.0, and 0.27 mg/L, respectively, in the UASB-ABF sewage treatment system at recycling ratio of 3 with alum.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fbb4b8efa73d86c0505c7f4161a0769a https://doi.org/10.1080/19443994.2014.993209 Zobrazit plný text záznamu