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Production of polyhydroxyalkanoates using dairy processing waste - A review.

Abhishek Dutt Tripathi¹, Veena Paul¹, Aparna Agarwal²

¹Department of Dairy Science and Food Technology, Institute of Agricultural Sciences, Banaras Hindu University, Uttar Pradesh, India.

Bioresource Technology

|January 28, 2021

Summary

This review explores polyhydroxyalkanoates (PHAs), eco-friendly bioplastics for food packaging. Strategies to reduce PHA production costs and enhance their properties are discussed for commercial viability.

Keywords:

Biodegradable polymers Eco-friend Food industry Inexpensive substrate Polyhydroxyalkanoates

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Area of Science:

Biotechnology
Polymer Science
Environmental Science

Background:

Bio-plastics offer eco-friendly alternatives with desirable properties for food and pharmaceutical industries.
Microbial polyhydroxyalkanoates (PHAs) are promising bio-plastics but face high production costs.
Current applications include food packaging due to excellent barrier properties.

Purpose of the Study:

To comprehensively review the production, recovery, purification, characterization, and applications of PHAs.
To explore strategies for cost-effective PHA production, including using dairy waste and metabolic engineering.
To highlight novel PHA nanocomposite synthesis and their commercial potential.

Main Methods:

Review of existing literature on PHA production and applications.
Analysis of strategies for optimizing PHA yield and reducing costs.
Examination of biosynthetic mechanisms and metabolic engineering approaches.
Discussion of biodegradability testing and nanocomposite development.

Main Results:

PHAs exhibit suitable physicochemical and mechanical properties for various applications.
Cost reduction strategies involve strain screening, inexpensive raw materials, and optimized processing.
Dairy processing waste presents a viable substrate for efficient PHA production.
Novel nanocomposite synthesis offers enhanced material properties.

Conclusions:

PHAs are versatile and sustainable bio-plastics with significant industrial potential.
Optimizing production processes and utilizing waste streams are key to economic feasibility.
Advancements in nanocomposite technology open new avenues for PHA commercialization.