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GISCOD: General Integrated Solid Waste Co-Digestion model

På svenska

Author

  • Usama Zaher
  • Rongping Li
  • Ulf Jeppsson
  • Jean-Philippe Steyer
  • Shulin Chen

Summary, in English

This paper views waste as a resource and anaerobic digestion (AD) as an established biological process for waste treatment, methane production and energy generation. A powerful simulation tool was developed for the optimization and the assessment of co-digestion of any combination of solid waste streams. Optimization was aimed to determine the optimal ratio between different waste streams and hydraulic retention time by changing the digester feed rates to maximize the biogas production rate. Different model nodes based on the ADM1 were integrated and implemented on the Matlab-Simulink (R) simulation platform. Transformer model nodes were developed to generate detailed input for ADM1, estimating the particulate waste fractions of carbohydrates, proteins, lipids and inerts. Hydrolysis nodes were modeled separately for each waste stream. The fluxes from the hydrolysis nodes were combined and generated a detailed input vector to the ADM1. The integrated model was applied to a co-digestion case study of diluted dairy manure and kitchen wastes. The integrated model demonstrated reliable results in terms of calibration and optimization of this case study. The hydrolysis kinetics were calibrated for each waste fraction, and led to accurate simulation results of the process and prediction of the biogas production. The optimization simulated 200,000 days of virtual experimental time in 8 h and determined the feedstock ratio and retention time to set the digester operation for maximum biogas production rate. Published by Elsevier Ltd.

Publishing year

2009

Language

English

Pages

2717-2727

Publication/Series

Water Research

Volume

43

Issue

10

Document type

Journal article

Publisher

Elsevier

Topic

  • Other Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • Co-digestion
  • Hydrolysis
  • Integrated modeling
  • Transformer model
  • Solid waste
  • ADM1

Status

Published

ISBN/ISSN/Other

  • ISSN: 1879-2448