Electrodialytic recovery of light carboxylic acids from industrial aqueous wastes

Abstract

A study has been carried out on the possibility of recovery light carboxylic acids (C1-C6) from an acidic waste stream by means of electrodialysis (ED) technique. The starting solution has very low concentration in organic acids and low specific conductivity. The main object of the study is the identification of the critical aspects for a complete electrodeionization of the water in a scheme of water reuse as process water or boiler feed-water. Concentration and recovery of carboxylic acids from wastewater streams can be a sustainable ''green'' alternative to biological degradation and turn into a valuable alternative, the more the higher the possibility of reusing the concentrated organic acid stream. In this work an ED cell was assembled and experiments were performed with acetic acid solution as model trace chemical in water. A real wastewater stream was also treated and results are discussed in term of current efficiency and energy consumption.

Volatile fatty acids production from sewage organic matter by combined bioflocculation and anaerobic fermentation

“…Especially, ED in combination with high pH offers an interesting potential. VFA that are generated under an alkaline pH are in the anionic form and can be directly extracted from the fermentation broth using ED (Huang et al, 2007;Vertova et al, 2009). Meanwhile, it should also be noted that alkaline pH may affect the VFA composition of the end product and may cause toxicity to the fermenting microorganisms by free ammonia.…”

Chemicals and Allied Products Waste Treatment

“…Vertova et al found elctrodialysis for treating light carboxylic acids from an acidic waste stream. In addition, the authors determine that the use of electrodialysis is a sustainable alternative to biological degradation [106].…”

Chemicals and Allied Products

“…The components considered using UV light source, UV irridation, hydrogen peroxide and ultrasound constituent. Vertova et al (2009) found elctrodialysis for treating light carboxylic acids from an acidic waste stream.…”