Development and application of a simulation model for the thermophilic oxic process for treating swine waste

Kyoungho Jeon, Kazunori Nakano, Osamu Nishimura

Research output: Contribution to journalArticle

Abstract

The thermophilic oxic process (TOP) is a composting process that enables simultaneous complete decomposition and evaporation of organic waste under high temperature conditions supported by well-balanced calorific value control. To develop the simulation model for TOP, three-dimensional relationships among decomposition rate constant, temperature (20-70 °C) and moisture content (30-70%) were determined for swine waste and cooking oil based on the oxygen consumption rate during a thermophilic oxic decomposition reaction. The decomposition rate of swine waste and cooking oil under various moisture contents was described by the Arrhenius equation. The optimal temperature and moisture content were 60 °C and 60% for swine waste and 60 °C and 50% for cooking oil, respectively. The simulation model for TOP was constructed on the basis of the carbon, heat, and moisture balance. The validation of the simulation model was examined by comparing the measured temperature in the TOP reactor to that estimated by the simulation. The simulation model was proven by comparing experimental and calculated values. The relationship between the injection calorific value and the process mechanism of TOP was interpreted by the simulation model. On the basis of their relationship during TOP, the appropriate process conditions were discussed.

Original languageEnglish
Pages (from-to)348-356
Number of pages9
JournalWater Research
Volume45
Issue number1
DOIs
Publication statusPublished - 2011 Jan

Keywords

  • Arrhenius equation
  • Cooking oil
  • Decomposition rate constant
  • Simulation model
  • Swine waste
  • Thermophilic oxic process

ASJC Scopus subject areas

  • Ecological Modelling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

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