Valorization of fruit and vegetable waste for biofertilizer and biogas
Abstract
The ubiquity of irrational disposal practices for fruit and vegetable waste (FVW) poses prohibitive environmental and economic liability. Anaerobic digestion of fruit and vegetable residues into biofertilizer is a potential solution to reduce environmental pollution and improve soil nutrition. High carbon and low nitrogen content is the main challenge in the bioprocessing of FVWs. In such cases, FVWs is co‐digested with another eco‐waste, the slaughterhouse wastewater (SWW). The issues of abattoir waste disposal are a serious threat to the societal health and hygiene. Interestingly, SWW is a house of mixed microorganisms which release enzymes for anaerobic digestion. In our present study, a two‐stage digestion process, that is, anaerobic digestion followed aerobic digestion using Trichoderma reesei is carried out under optimized conditions for enhanced biofertilizer formation. Each stage was completed in 15 days, total digestion time being 1 month. Biogas generated during the anaerobic process is 16 L/kg for fruit wastes (FWs) and 13.2 L/kg for vegetable wastes (VWs). Significant decrease in lignin up to 64% in case of FWs and 70% in case of VWs helped in cellulose degradation. The FVWs are finally reduced to a potential value‐added biofertilizer with 10–11 C: N ratio. Practical Applications: Stringent wastes like fruit and vegetable waste (FVW) as well as the slaughterhouse waste were considered for bioremediation and value‐added application. A simple, rapid, unique, and easy to scale‐up technique was envisaged for conversion of FVWs into potential biofertilizer through two‐stage co‐digestion. The studies conducted will be useful for FVW management at household as well as industrial level.
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The process generated 29.2 L/kg of biogas from anaerobic digestion of fruit and vegetable waste and biofertilizer of C:N ratio of 10:11.
“The process generated 29.2 L/kg of biogas from the anaerobic digestion of fruit and vegetable waste and biofertilizer of C:N ratio of 10:11 [125].”
From Food Waste Biorefinery: Pathway towards Circular Bioeconomy (2021) · cites this paper as [125]
The sequential digestion of the two-stage anaerobic process followed by the aerobic process of fruit and vegetable waste mixed with slaughterhouse waste significantly enhanced biofertilizer formations.
“The sequential digestion of the two-stage anaerobic process followed by the aerobic process of fruit and vegetable waste mixed with slaughterhouse waste significantly enhanced biofertilizer formations [125].”
From Food Waste Biorefinery: Pathway towards Circular Bioeconomy (2021) · cites this paper as [125]
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Food Waste Biorefinery: Pathway towards Circular Bioeconomy
Tsegaye, B., Jaiswal, S., & Jaiswal, A. K. (2021) · Foods · doi:10.3390/foods10061174 · Cited by 191 · see citing works
- Authors
- Chakravarty, I., & Mandavgane, S. A.
- Affiliations
- Visvesvaraya National Institute of Technology (IN)
- Corresponding author
- Mandavgane, Sachin A.
- Venue
- Journal of Food Process Engineering
- Publisher
- Wiley
- Published
- 2020-09-06
- Volume
- 44
- Issue
- 2
- ISSN
- 0145-8876 (ISSN-L)
- 1745-4530
- OpenAlex
- W3083044159
- Cited by
- 41
- References
- 32
- Citations by year
- 2026: 6 · 2025: 9 · 2024: 7 · 2023: 9 · 2022: 9 · 2021: 1
- FWCI
- 2.52
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Food Process Engineering (publishedVersion)
- Topics
- Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Composting and Vermicomposting Techniques
- Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
- Keywords
- fruit and vegetable waste, biofertilizers, biogas, anaerobic digestion, slaughterhouse wastewater, co-digestion, Trichoderma reesei, aerobic digestion, lignin degradation, cellulose degradation, C/N ratio, waste valorization
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