Precipitation of iron-hydroxy-phosphate of added ferric iron from domestic wastewater by an alternating aerobic-anoxic process

被引：40
作者：
Fulazzaky, Mohamad Ali [1 ,2 ]
Salim, Nur Atikah Abdul [1 ]
Abdullah, Noorul Hudai [1 ]
Yusoff, Abdull Rahim Mohd [1 ]
Paul, Etienne [2 ]
机构：
[1] Univ Teknol Malaysia, Inst Environm & Water Resources Management, Water Res Alliance, UTM Skudai 81310, Johor Bahru, Malaysia
[2] Inst Natl Sci Appl Toulouse, Lab Ingn Syst Biolog & Proc, F-31077 Toulouse, France
来源：
CHEMICAL ENGINEERING JOURNAL | 2014年 / 253卷
关键词：
Alternating aerobic anoxic process; Domestic wastewater; Ferric iron; Iron-hydroxy-phosphate; Single-sludge nitrification-denitrification; SIMULTANEOUS CHEMICAL PRECIPITATION; BIOLOGICAL PHOSPHORUS REMOVAL; ACTIVATED-SLUDGE REACTOR; FE(II) OXIDATION; ADSORPTION; NITROGEN; MODEL; ACID; PH;
D O I：
10.1016/j.cej.2014.05.049
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Removal of phosphorus from a municipal wastewater by simultaneous precipitation of ironhydroxy-phosphate (IHP) was investigated. The addition of Fe3+ was performed to supplement biological excess phosphorus removal by a completely mixed alternating aerobic-anoxic (AAA) activated sludge process. The cycles of 3-h anoxic time and 3-h aerobic digestion were set to controlling a single-sludge nitrification-denitrification. In this study, attempt has been made to analyse the effects of initial dissolved Fe/P molar ratio and pH on IHP precipitation. The AAA treatment process to remove soluble reactive and total phosphorus from domestic wastewater had a moderate efficiency. The empirical formula of IHP that differs from different pH ranges was verified. Two types of Fe-4(OH)(9)PO4 and Fe-5(OH)(6)(PO4)(3) precipitate may occur in different conditions of the AAA process. The efficiency of phosphorus removal from domestic wastewater by an AAA process was verified to contribute to a working methodology for the application of technologies in the field of domestic wastewater treatment. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：291 / 297
页数：7
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