Pretreatment Strategies to Enhance Value Addition of Agro-industrial Wastes

Woiciechowski, Adenise Lorenci; Karp, Susan Grace; Sobral, Keli; Carvalho, Júlio César de; Letti, Luiz Alberto Júnior; Soccol, V. T.; Soccol, Carlos Ricardo

doi:10.1007/978-1-4614-8005-1_2

Cited by 2 publications

(1 citation statement)

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“…Enzymatic hydrolysis is a particularly attractive technique to convert underutilized RBC into the acceptable and marketable forms. Intriguingly, enzymatic hydrolysis offers several advantages, including mild reaction conditions, high product yields, minimal formation of by-products, high safety and low energy cost [ 3 ]. Proteolysis is measured by degree of hydrolysis (DH), which is a key parameter to determine the nutritional and functional properties of protein hydrolysate [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Bioconversion of duck blood cell: process optimization of hydrolytic conditions and peptide hydrolysate characterization

et al. 2018

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BackgroundAs the protein-laden by-product, red blood cells (RBCs) from poultry blood is a potential source of protein used as food and feed ingredient. However, RBC was currently underutilized. Therefore, it is an urgent need to develop feasible and cost-effective methods for converting poultry waste into nutritional and functional products.ResultsTo take full advantage of this poultry waste, peptide hydrolysate was produced by deep controllable bioconversion of RBC, by means of synergistic combination of neutrase and flavourzyme. In this work, the functional properties and antioxidant activity of peptide hydrolysate were also characterized. The degree of hydrolysis (DH) was optimized using response surface methodology, and optimal hydrolysis conditions were found to be: temperature 51 °C, substrate concentration 14% (w/v), initial pH 7.0, and time 7.5 h. The red blood cell hydrolysate (RBCH) obtained not only possessed plentiful small peptides (< 3 kDa, 68.14%), but also was abundant in essential amino acids, accounting for over 50% of total amino acids. In addition to its excellent solubility (> 80%), emulsifying and foaming properties, RBCH also exhibited notable antioxidant activities, such as DPPH (2,2-diphenyl− 1-picrylhydrazyl) radical-scavenging activity (IC50, 4.16 mg/mL), reducing power, metal chelating ability and inhibiting lipid peroxidation.ConclusionsRBCH enriched in small peptides has the potential to be a new food additive with outstanding functional and antioxidant properties, and a process was established for converting poultry waste into peptide hydrolysate using neutrase and flavourzyme.Electronic supplementary materialThe online version of this article (10.1186/s12896-018-0475-5) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Bioconversion of duck blood cell: process optimization of hydrolytic conditions and peptide hydrolysate characterization

et al. 2018

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Microbial Astaxanthin Production from Agro-Industrial Wastes—Raw Materials, Processes, and Quality

et al. 2022

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The antioxidant and food pigment astaxanthin (AX) can be produced by several microorganisms, in auto- or heterotrophic conditions. Regardless of the organism, AX concentrations in culture media are low, typically about 10–40 mg/L. Therefore, large amounts of nutrients and water are necessary to prepare culture media. Using low-cost substrates such as agro-industrial solid and liquid wastes is desirable for cost reduction. This opens up the opportunity of coupling AX production to other existing processes, taking advantage of available residues or co-products in a biorefinery approach. Indeed, the scientific literature shows that many attempts are being made to produce AX from residues. However, this brings challenges regarding raw material variability, process conditions, product titers, and downstream processing. This text overviews nutritional requirements and suitable culture media for producing AX-rich biomass: production and productivity ranges, residue pretreatment, and how the selected microorganism and culture media combinations affect further biomass production and quality. State-of-the-art technology indicates that, while H. pluvialis will remain an important source of AX, X. dendrorhous may be used in novel processes using residues.

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Pretreatment Strategies to Enhance Value Addition of Agro-industrial Wastes

Cited by 2 publications

References 51 publications

Bioconversion of duck blood cell: process optimization of hydrolytic conditions and peptide hydrolysate characterization

Bioconversion of duck blood cell: process optimization of hydrolytic conditions and peptide hydrolysate characterization

Microbial Astaxanthin Production from Agro-Industrial Wastes—Raw Materials, Processes, and Quality

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