Influence of relaxation modes on membrane fouling in submerged membrane bioreactor for domestic wastewater treatment

被引：53
作者：
Habib, Rasikh [1 ]
Asif, Muhammad Bilal [1 ,2 ]
Iftekhar, Sidra [1 ,3 ]
Khan, Zahiruddin [4 ]
Gurung, Khum [3 ]
Srivastava, Varsha [3 ]
Sillanpaa, Mika [3 ,5 ]
机构：
[1] Univ Engn & Technol, Dept Environm Engn, Taxila 47050, Pakistan
[2] Univ Wollongong UOW, Sch Civil Min & Environm Engn, Strateg Water Infrastruct Lab, Wollongong, NSW 2522, Australia
[3] Lappeenranta Univ Technol, Sch Engn Sci, Lab Green Chem, Sammonkatu 12, FI-50130 Mikkeli, Finland
[4] Govt Punjab, Punjab Saaf Pani Co, Lahore 54000, Pakistan
[5] Florida Int Univ, Dept Civil & Environm Engn, Miami, FL 33174 USA
来源：
CHEMOSPHERE | 2017年 / 181卷
关键词：
Fouling resistances; Membrane fouling rate; Relaxation modes; Soluble microbial products; Submerged membrane bioreactor; NUTRIENT REMOVAL; MBR; OPERATION; PERFORMANCE; REVERSIBILITY; SUBSTANCES; PARAMETERS; QUALITY; SURFACE; CAKE;
D O I：
10.1016/j.chemosphere.2017.04.048
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Relaxation and backwashing have become an integral part of membrane bioreactor (MBR) operations for fouling control. This study was carried out on real municipal wastewater to evaluate the influence of different operational strategies on membrane fouling at equivalent water yield. Four relaxation modes (MBR10+0, MBR10+1, MBR10.+1.5 and MBR10+2) were tested to analyze membrane fouling behavior. For the optimization of relaxation modes, fouling rate in terms of trans-membrane pressure, hydraulic resistances and characteristics of fouling fractions were analyzed. It has been observed that cake layer resistance was minimum in MBR10-1.5 but pore blockage resistance was increased in all relaxation modes. Moreover, high instantaneous flux contributed significantly to fouling rate at the initial stage of MBR operations. Relaxation modes were also efficient in removing irreversible fouling to some extent. Under all relaxation modes, COD removal efficiency ranged from 92 to 96.5%. Ammonium and TP removal were on the lower side due to the short solids and hydraulic retention time. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：19 / 25
页数：7
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