Granular biomass floatation: A simple kinetic/stoichiometric explanation

被引：28

作者：

Campos, J. L. ^{[1
]}

Val del Rio, A. ^{[2
]}

Pedrouso, A. ^{[2
]}

Raux, P. ^{[1
]}

Giustinianovich, E. A. ^{[3
]}

Mosquera-Corral, A. ^{[2
]}

机构：

[1] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Avda Padre Hurtado 750, Vina Del Mar, Chile

[2] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, E-15705 Santiago De Compostela, Spain

[3] Univ Concepcion, Chem Engn Dept, Casilla 160-C, Concepcion, Chile

来源：

CHEMICAL ENGINEERING JOURNAL | 2017年 / 311卷

关键词：

Anaerobic; Anammox; Denitrification; Granule; Methane; Nitrogen; SEQUENCING BATCH REACTOR; ANAMMOX PROCESS; WASTE-WATER; SLUDGE FLOTATION; CONTROL STRATEGY; PERFORMANCE; MODEL; DENITRIFICATION; REACTIVATION; STABILITY;

D O I：

10.1016/j.cej.2016.11.075

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Floatation events are commonly observed in anammox, denitrifying and anaerobic granular systems mostly subjected to overloading conditions. Although several operational strategies have been proposed to avoid floatation of granular biomass, until now, there is no consensus about the conditions responsible for this phenomenon. In the present study, a simple explanation based on kinetic and stoichiometric principles defining the aforementioned processes is provided. The operational zones corresponding to evaluated parameters where risk of floatation exists are defined as a function of substrate concentration in the bulk liquid and the radius of the granule. Moreover, the possible control of biomass floatation by changing the operating temperature was analyzed. Defined operational zones and profiles fit data reported in literature for granular biomass floatation events. From the study the most influencing parameter on floatation occurrence has been identified as the substrate concentration in the bulk media. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：63 / 71

页数：9

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