Membrane Water Treatment for Drinking Water Production from an Industrial Effluent Used in the Manufacturing of Food Additives

An integrated membrane process for treatment of effluents from food additive manufacturing was designed and evaluated on a laboratory scale. The principal focus was water recovery with the possibility of its reuse as potable water. The industrial effluent presented high content of dyes and salts. It...

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Bibliographic Details
Published in:Membranes (Basel) 2022-07, Vol.12 (8), p.742
Main Authors: Hernández, Karina, Muro, Claudia, Monroy, Oscar, Diaz-Blancas, Vianney, Alvarado, Yolanda, Diaz, María del Carmen
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Canada
Chemical oxygen demand
Color
Continuous flow
Dominance
Drinking water
dye removal
Effluent treatment
Effluents
Evaluation
Flow rates
Flow velocity
Food additives
food effluents
Fouling
Industrial effluents
Industrial wastes
Industrial wastewater
Ion exchange
Manufacturing
Membrane processes
Membrane resistance
membrane treatment
Membranes
potable water
Purification
Quality standards
Reclaimed water
Resins
Reverse osmosis
Rupture
Rupturing
saline effluents
Salts
Sedimentation & deposition
Sewage
Wastewater treatment
Water pollution
Water quality standards
water recovery
Water reuse
Water treatment
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Summary:An integrated membrane process for treatment of effluents from food additive manufacturing was designed and evaluated on a laboratory scale. The principal focus was water recovery with the possibility of its reuse as potable water. The industrial effluent presented high content of dyes and salts. It was red in color and presented brine characteristics. The whole effluent was fed into the integrated process in continuous flow. The steps of the process are as follows: sedimentation (S), adsorption by activated carbon (AC), ion exchange using resins (IEXR), and reverse osmosis (RO) (S–AC–IEXR–RO). The effect of previous operations was evaluated by stress-rupture curves in packaged columns of AC and IEXR, membrane flux, and fouling dominance in RO. Fouling was evaluated by way of the Silt Density Index and membrane resistance examination during effluent treatment. The integrated membrane process provided reclaimed water with sufficiently high standards of quality for reuse as potable water. AC showed a high efficiency for color elimination, reaching its rupture point at 20 h and after 5L of effluent treatment. IEXR showed capacity for salt removal, providing 2.2–2.5 L of effluent treatment, reaching its rupture point at 11–15 h. As a result of these previous operations and operating conditions, the fouling of the RO membrane was alleviated, displaying high flux of water: 20–18 L/h/m2 and maintaining reversible fouling dominance at a feed flow rate of 0.5–0.7 L/h. The characteristics of the reclaimed water showed drinking water standards
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes12080742