TY - JOUR

T1 - Clarification of olive mill and winery wastewater by means of clay-polymer nanocomposites

AU - Rytwo, Giora

AU - Lavi, Roy

AU - Rytwo, Yuval

AU - Monchase, Hila

AU - Dultz, Stefan

AU - König, Tom N.

N1 - Funding information: This study was performed with the aid of the JCA Charitable Foundation and was partially supported by the CIP-ECOInnovation MISSTOW project. We also thank Mrs. Camille Vainstein for professional English editing of the manuscript.

PY - 2013

Y1 - 2013

N2 - Highly polluted effluents from olive mills and wineries, among others, are unsuitable for discharge into standard sewage-treatment plants due to the large amounts of organic and suspended matter. Efficiency of all management practices for such effluents depends on an effective pretreatment that lowers the amount of suspended solids. Such pretreatments are usually based on three separate stages, taking a total of 2 to 6. h: coagulation-neutralizing the colloids, flocculation-aggregating the colloids into larger particles, and separation via filtration or decanting. Previous studies have presented the concept of coagoflocculation based on the use of clay-polymer nanocomposites. This process adds a higher density clay particle to the flocs, accelerating the process to between 15 and 60. min. This study examined suitable nanocomposites based on different clays and polymers. The charge of the compounds increased proportionally to the polymer-to-clay ratio. X-ray diffraction (XRD) measurements indicated that in sepiolite-based nanocomposites there is no change in the structure of the mineral, whereas in smectite-based nanocomposites, the polymer intercalates between the clay layers and increases the spacing depending on the polymer-to-clay ratio. Efficiency of the coagoflocculation process was studied with a dispersion analyzer. Sequential addition of olive mill or winery effluents with a boosting dose of nanocomposites may yield a very efficient and rapid clarification pretreatment.

AB - Highly polluted effluents from olive mills and wineries, among others, are unsuitable for discharge into standard sewage-treatment plants due to the large amounts of organic and suspended matter. Efficiency of all management practices for such effluents depends on an effective pretreatment that lowers the amount of suspended solids. Such pretreatments are usually based on three separate stages, taking a total of 2 to 6. h: coagulation-neutralizing the colloids, flocculation-aggregating the colloids into larger particles, and separation via filtration or decanting. Previous studies have presented the concept of coagoflocculation based on the use of clay-polymer nanocomposites. This process adds a higher density clay particle to the flocs, accelerating the process to between 15 and 60. min. This study examined suitable nanocomposites based on different clays and polymers. The charge of the compounds increased proportionally to the polymer-to-clay ratio. X-ray diffraction (XRD) measurements indicated that in sepiolite-based nanocomposites there is no change in the structure of the mineral, whereas in smectite-based nanocomposites, the polymer intercalates between the clay layers and increases the spacing depending on the polymer-to-clay ratio. Efficiency of the coagoflocculation process was studied with a dispersion analyzer. Sequential addition of olive mill or winery effluents with a boosting dose of nanocomposites may yield a very efficient and rapid clarification pretreatment.

KW - Clarification

KW - Coaguflocculation

KW - Nanocomposites

KW - Olive mill wastewater

KW - Pre-treatment

KW - Winery wastewater

UR - http://www.scopus.com/inward/record.url?scp=84869862207&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2012.10.031

DO - 10.1016/j.scitotenv.2012.10.031

M3 - Article

C2 - 23178773

AN - SCOPUS:84869862207

VL - 442

SP - 134

EP - 142

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -