alexa Kinetic Modeling of Mixed Culture Process of Anaerobic Co-digestion of Vegetable Wastes with Pistia stratiotes: A Scientific Attempt on Biomethanationy
ISSN: 1948-5948

Journal of Microbial & Biochemical Technology
Open Access

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Research Article

Kinetic Modeling of Mixed Culture Process of Anaerobic Co-digestion of Vegetable Wastes with Pistia stratiotes: A Scientific Attempt on Biomethanationy

Samuel J1, Gujjala Lohit Kumar S2 and Rintu B1*

1Department of Agricultural and Food Engineering, Microbial Biotechnology and Downstream Processing Laboratory, Indian Institute of Technology, Kharagpur-721302, India

2Advanced Technology and Development Centre, Indian Institute of Technology, Kharagpur-721302, India

*Corresponding Author:
Rintu B
Department of Agricultural and Food Engineering
Microbial Biotechnology and Downstream Processing Laboratory
Indian Institute of Technology, Kharagpur-721302, India
Tel: +91-3222-283104
Fax: +91-3222-282244
E-mail: [email protected]

Received date: January 13, 2017; Accepted date: February 09, 2017; Published date: February 16, 2017

Citation: Samuel J, Kumar SGL, Rintu B (2017) Kinetic Modeling of Mixed Culture Process of Anaerobic Co-digestion of Vegetable Wastes with Pistia stratiotes: A Scientific Attempt on Biomethanation. J Microb Biochem Technol 9:036-048. doi:10.4172/1948-5948.1000341

Copyright: © 2017 Samuel J, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

As co-digestion of two wastes together lead to balanced environment for biomethanation an attempt has been made in the present study to co-digest vegetable waste (VW) and Pistia stratiotes (PS) to overcome the acidification problem during mono-digestion of VW. Optimization of important process parameters for anaerobic co-digestion was done based on Central Composite Design (CCD) based Response Surface Methodology (RSM). Thereafter, modeling of the anaerobic digestion was carried out using first order, modified Gompertz and unstructured segregated model to study the process behavior. First order and modified Gompertz models were found to fit with the observed methane profile with R2 of ~0.99. In case of unstructured segregated model important kinetic constants such as Khs, KSS, KVFA were derived from the model and the values were found to be 0.1 d-1, 2.3 g/L and 881.68 mg/L, respectively. Based on these kinetic parameters, simulated cumulative methane production was generated which matched well with the observed methane yield within the error band of ± 20%. This showed that the developed model could represent the overall process behaviour of this novel anaerobic co-digestion using mixed anaerobic culture as an inoculum.

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