AccScience Publishing / AJWEP / Volume 16 / Issue 3 / DOI: 10.3233/AJW190028
RESEARCH ARTICLE

Biodegradation of Fruit Waste under Optimum Nutrient  Conditions and Different Bacterial Inocula

Gajraj Singh Rajput a1 Sudha Goel1*
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1 Civil Engineering Departmentn Institute of Technology Kharagpur, West Bengal – 721302, India
AJWEP 2019, 16(3), 9–17; https://doi.org/10.3233/AJW190028
Submitted: 1 September 2018 | Revised: 24 May 2019 | Accepted: 24 May 2019 | Published: 19 July 2019
© 2019 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
Abstract

Solid waste is becoming a major problem day-by-day. Fruit waste is a significant organic fraction of  municipal solid waste and has high moisture content and high volatile solids concentration or organic content.  Due to this, it easily degrades in the environment and releases nuisance gases like CH4 , H2 S, CO2, NH3, etc.  A possible method for treating fruit waste is composting. The composting rate depends on the nature of the  biodegradable materials, so the main objective of this paper was to characterize mixed fruit waste and determine  the biodegradable fractions of this waste and the corresponding rate constants. The mixed fruit waste samples  were biodegraded using different inocula such as soil bacteria, cow dung and sludge under aerobic conditions

Five different fruit peels samples were used in this study: Citrus limetta (Mosambi), mango, banana, pineapple,  pomegranate and the same were characterized for various physico-chemical and biological parameters. Batch  biodegradation studies were conducted under aerobic conditions by incubating a mixture of all five types of fruit  peels in equal proportions. In the first biodegradation study of fruit waste with soil bacteria as inocula, 73.12%  removal of TSS and 70.12% removal of VSS were observed in 65 days. In the second batch biodegradation study  of fruit waste with cow dung as inocula, TSS removals of 75.27% and VSS removals of 82.67% were observed  in 65 days. In the third batch biodegradation study of fruit waste with sludge as inocula, TSS removals of 67.78%  and VSS removals of 60.17% were observed. Fruit peels waste was found to degrade rapidly (within 8 to 21 days)  after which very little change in TSS or VSS concentrations were observed

Keywords
Solid waste
C/N ratio
tannin-lignin
bacteria
reaction rate
Conflict of interest
The authors declare they have no competing interests.
References

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Asian Journal of Water, Environment and Pollution, Electronic ISSN: 1875-8568 Print ISSN: 0972-9860, Published by AccScience Publishing