TY - JOUR
T1 - Enhanced sludge properties and distribution study of sludge components in electrically-enhanced membrane bioreactor
AU - Giwa, Adewale
AU - Ahmed, Iftikhar
AU - Hasan, Shadi Wajih
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/8/5
Y1 - 2015/8/5
N2 - This study investigated the impact of electric field on the physicochemical and biological characteristics of sludge wasted from an electrically-enhanced membrane bioreactor treating medium-strength raw wastewater. This method offers a chemical-free electrokinetic technique to enhance sludge properties and remove heavy metals. For example, sludge volume index (SVI), time-to-filter (TTF), mean sludge particle diameter (PSD), viscosity, and oxidation-reduction potential (ORP) of 21.7mL/g, 7min, 40.2μm, 3.22mPas, and-4.9mV were reported, respectively. Also, X-ray fluorescence (XRF) and X-ray diffraction (XRD) analyses provided mechanisms for heavy metal removal so as to establish relevant pathways for nutrient recovery. Furthermore, variations in dissolved oxygen (DO), conductivity, viscosity, ORP, total suspended solids (MLSS), and volatile suspended solids (MLVSS) were interrelated to evaluate the quality of wasted sludge. A pathway study on the transport and chemical distribution of nutrients and metals in sludge showed great potential for metal removal and nutrient recovery.
AB - This study investigated the impact of electric field on the physicochemical and biological characteristics of sludge wasted from an electrically-enhanced membrane bioreactor treating medium-strength raw wastewater. This method offers a chemical-free electrokinetic technique to enhance sludge properties and remove heavy metals. For example, sludge volume index (SVI), time-to-filter (TTF), mean sludge particle diameter (PSD), viscosity, and oxidation-reduction potential (ORP) of 21.7mL/g, 7min, 40.2μm, 3.22mPas, and-4.9mV were reported, respectively. Also, X-ray fluorescence (XRF) and X-ray diffraction (XRD) analyses provided mechanisms for heavy metal removal so as to establish relevant pathways for nutrient recovery. Furthermore, variations in dissolved oxygen (DO), conductivity, viscosity, ORP, total suspended solids (MLSS), and volatile suspended solids (MLVSS) were interrelated to evaluate the quality of wasted sludge. A pathway study on the transport and chemical distribution of nutrients and metals in sludge showed great potential for metal removal and nutrient recovery.
KW - Chemical distribution
KW - Electrokinetics
KW - Membrane bioreactor
KW - Nutrient recovery
KW - Sludge management
UR - http://www.scopus.com/inward/record.url?scp=84930636723&partnerID=8YFLogxK
U2 - 10.1016/j.jenvman.2015.05.035
DO - 10.1016/j.jenvman.2015.05.035
M3 - Article
C2 - 26048394
AN - SCOPUS:84930636723
SN - 0301-4797
VL - 159
SP - 78
EP - 85
JO - Journal of Environmental Management
JF - Journal of Environmental Management
ER -
