Esters production via carboxylates from anaerobic paper mill wastewater treatment

被引：16

作者：

Cabrera-Rodriguez, Carlos I. ^{[1
]}

Moreno-Gonzalez, Monica ^{[1
]}

de Weerd, Florence A. ^{[1
]}

Viswanathan, Vidhvath ^{[1
]}

van der Wielen, Luuk A. M. ^{[1
]}

Straathof, Adrie J. J. ^{[1
]}

机构：

[1] Delft Univ Technol, Dept Biotechnol, Van der Maasweg 9, NL-2629 HZ Delft, Netherlands

来源：

BIORESOURCE TECHNOLOGY | 2017年 / 237卷

关键词：

Anaerobic wastewater treatment; Paper mill; CO2-expanded methanol; Methyl carboxylates; Volatile fatty acids; VOLATILE FATTY-ACIDS; MIXED CULTURE FERMENTATION; CHAIN ELONGATION; PH CONTROL; CONVERSION; RECOVERY; ESTERIFICATION; BIOCHEMICALS; VALORIZATION; EXTRACTION;

D O I：

10.1016/j.biortech.2017.02.030

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This paper describes a new option for integrated recovery and esterification of carboxylates produced by anaerobic digestion at a pH above the pKa. The carboxylates (acetate, propionate, butyrate, valerate and lactate) are recovered using a strong anion exchange resin in the bicarbonate form, and the resin is regenerated using a CO2-expanded alcohol technique, which allows for low chemicals consumption and direct esterification. Paper mill wastewater was used to study the effect of pH and the presence of other inorganic anions and cations on the adsorption and desorption with CO2-expanded methanol. Calcium, which is present in paper mill wastewater, can cause precipitation problems, especially at high pH. Esters yields ranged from 1.08 +/- 0.04 mol methyl acetate/mol of acetatein to 0.57 +/- 0.02 mol methyl valerate/mol of valeratein. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：186 / 192

页数：7

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