globalchange  > 气候变化事实与影响
DOI: 10.1016/j.watres.2019.01.048
Scopus记录号: 2-s2.0-85062073407
论文题名:
Plant-wide model-based analysis of iron dosage strategies for chemical phosphorus removal in wastewater treatment systems
作者: Kazadi Mbamba C.; Lindblom E.; Flores-Alsina X.; Tait S.; Anderson S.; Saagi R.; Batstone D.J.; Gernaey K.V.; Jeppsson U.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 155
起始页码: 12
结束页码: 25
语种: 英语
英文关键词: Chemical precipitation ; Iron ; Membrane bioreactors ; Phosphorus removal ; Plant-wide model ; Wastewater treatment
英文摘要: Stringent phosphorus discharge standards (i.e. 0.15–0.3 g P.m −3 ) in the Baltic area will compel wastewater treatment practice to augment enhanced biological phosphorus removal (EBPR) with chemical precipitation using metal salts. This study examines control of iron chemical dosing for phosphorus removal under dynamic loading conditions to optimize operational aspects of a membrane biological reactor (MBR) pilot plant. An upgraded version of the Benchmark Simulation Model No. 2 (BSM2) with an improved physico-chemical framework (PCF) is used to develop a plant-wide model for the pilot plant. The PCF consists of an equilibrium approach describing ion speciation and pairing, kinetic minerals precipitation (such as hydrous ferric oxides (HFO) and FePO 4 ) as well as adsorption and co-precipitation. Model performance is assessed against data sets from the pilot plant, evaluating the capability to describe water and sludge lines across the treatment process under steady-state operation. Simulated phosphorus differed as little as 5–10% (relative) from measured phosphorus, indicating that the model was representative of reality. The study also shows that environmental factors such as pH, as well operating conditions such as Fe/P molar ratios (1, 1.5 and 2), influence the concentration of dissolved phosphate in the effluent. The time constant of simultaneous precipitation in the calibrated model, due to a step change decrease/increase in FeSO 4 dosage, was found to be roughly 5 days, indicating a slow dynamic response due to a multi-step process involving dissolution, oxidation, precipitation, aging, adsorption and co-precipitation. The persistence effect of accumulated iron-precipitates (HFO particulates) in the activated sludge seemed important for phosphorus removal, and therefore solids retention time plays a crucial role according to the model. The aerobic tank was deemed to be the most suitable dosing location for FeSO 4 addition, due to high dissolved oxygen levels and good mixing conditions. Finally, dynamic model-based analyses show the benefits of using automatic control when dosing chemicals. © 2019 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121925
Appears in Collections:气候变化事实与影响

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作者单位: RISE Research Institutes of Sweden, Energy and Circular Economy, Urban Water Management, Lund, SE-223 63, Sweden; Division of Industrial Electrical Engineering and Automation, Department of Biomedical Engineering, Lund University, Box 118, Lund, SE-221 00, Sweden; Stockholm Vatten Och Avfall, Stockholm, SE-106 36, Sweden; Process and Systems Engineering Center (PROSYS), Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, Kgs. LyngbyDK-2800, Denmark; Centre for Agricultural Engineering, University of Southern Queensland, Toowoomba, Queensland 4350, Australia; Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia

Recommended Citation:
Kazadi Mbamba C.,Lindblom E.,Flores-Alsina X.,et al. Plant-wide model-based analysis of iron dosage strategies for chemical phosphorus removal in wastewater treatment systems[J]. Water Research,2019-01-01,155
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