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Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Electrochemically and Bioelectrochemically Induced Ammonium Recovery

Published on: January 22, 2015

Recovery Techniques Enabling Circular Chemistry from Wastewater.

Vahideh Elhami¹, Evelyn C Antunes^1,2, Hardy Temmink^2,3

¹Sustainable Process Technology Group, Process and Catalysis Cluster, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands.

Molecules (Basel, Switzerland)

|February 25, 2022

Summary

Effective recovery of dilute chemicals from waste is crucial for sustainable production. This review explores methods for recovering carboxylic acids and polymers from wastewater, enabling valuable chemical production.

Keywords:

extracellular polymeric substances long-chain dicarboxylic acids medium-chain carboxylic acids separation technology unsaturated fatty acids volatile fatty acids

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Area of Science:

Biotechnology and biochemical engineering
Environmental science and engineering
Chemical process engineering

Background:

Growing environmental concerns necessitate waste valorization and reduced landfilling.
Microbial conversion of waste offers a route to producing valuable chemicals.
Dilute product concentrations in waste streams pose significant recovery challenges.

Purpose of the Study:

To review and highlight effective strategies for recovering biologically produced carboxylic acids and polymers from waste streams.
To discuss separation techniques applicable to various carboxylic acid types and polymeric substances.
To assess the potential of these recovery methods for advancing wastewater valorization.

Main Methods:

Literature review focusing on separation and recovery techniques for carboxylic acids and polymers.
Analysis of methods including liquid-liquid extraction, adsorption, and membrane separations for carboxylic acids.
Examination of thermal treatment for unsaturated short-chain acids (USCA) production and extracellular polymeric substances (EPS) fractionation.

Main Results:

Established recovery techniques like liquid-liquid extraction, adsorption, and membrane separations are effective for carboxylic acids.
Thermal treatment of polyhydroxyalkanoates (PHA) offers a pathway to unsaturated short-chain acids (USCA).
Fractionation strategies for extracellular polymeric substances (EPS) enable valorization of polysaccharides and proteins.

Conclusions:

Effective separation strategies are vital for the economic viability of waste-derived chemical production.
The reviewed techniques show significant potential for enhancing wastewater valorization chains.
Further development in recovery technologies can unlock greater value from waste streams.