skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High solids fermentation reactor

Abstract

A fermentation reactor and method for fermentation of materials having greater than about 10% solids. The reactor includes a rotatable shaft along the central axis, the shaft including rods extending outwardly to mix the materials. The reactor and method are useful for anaerobic digestion of municipal solid wastes to produce methane, for production of commodity chemicals from organic materials, and for microbial fermentation processes.

Inventors:
; ; ;
Publication Date:
Research Org.:
United States Of America, Department Of Energy
Sponsoring Org.:
USDOE
OSTI Identifier:
1176652
Patent Number(s):
H001149
Assignee:
United States Of America, Department Of Energy OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION

Citation Formats

Wyman, Charles E., Grohmann, Karel, Himmel, Michael E., and Richard, Christopher J.. High solids fermentation reactor. United States: N. p., 1993. Web.
Wyman, Charles E., Grohmann, Karel, Himmel, Michael E., & Richard, Christopher J.. High solids fermentation reactor. United States.
Wyman, Charles E., Grohmann, Karel, Himmel, Michael E., and Richard, Christopher J.. 1993. "High solids fermentation reactor". United States. doi:. https://www.osti.gov/servlets/purl/1176652.
@article{osti_1176652,
title = {High solids fermentation reactor},
author = {Wyman, Charles E. and Grohmann, Karel and Himmel, Michael E. and Richard, Christopher J.},
abstractNote = {A fermentation reactor and method for fermentation of materials having greater than about 10% solids. The reactor includes a rotatable shaft along the central axis, the shaft including rods extending outwardly to mix the materials. The reactor and method are useful for anaerobic digestion of municipal solid wastes to produce methane, for production of commodity chemicals from organic materials, and for microbial fermentation processes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1993,
month = 3
}

Patent:

Save / Share:
  • A fermentation reactor and method for fermentation of materials having greater than about 10% solids. The reactor includes a rotatable shaft along the central axis, the shaft including rods extending outwardly to mix the materials. The reactor and method are useful for anaerobic digestion of municipal solid wastes to produce methane, for production of commodity chemicals from organic materials, and for microbial fermentation processes.
  • A coupled high solids fermentation and attached-growth anaerobic filtration process to produce methane from cellulosic residues was developed and successfully operated for 18 months using wheat straw as the substrate. The process was conducted in eight 600 ml packed reactors and two anaerobic filters connected in series allowing semi-continuous feeding of straw at a solids concentration of 34%. The major functions of the packed reactors were the hydrolysis of the solid substrate and the production of organic acids. The volatile fatty acid COD, composed mostly by acetic, propionic, and butyric acids, was produced at a slower rate than soluble CODmore » in the packed reactors. Specific methane production rates as high as 2.1 liter CH/sub 4/ per day per liter reactor volume and a volatile fatty acid COD removal efficiency of 98% were obtained. Total methane production per unit weight of substrate input was 104.3 ml CH/sub 4/ per gram of straw input with 40 days substrate solids retention time and 76.3 ml CH/sub 4//g straw with 18 days solids retention time. Results of a direct input study, without the liquid reservoir, suggested that the methanogenic bacteria in the anaerobic filters could sustain methane production during transient loading, although the suddenly increased substrate could not be completely utilized on the first pass. A mathematical model of solid substrate degradation in the packed reactor was developed.« less
  • Cited by 1
  • A solar powered kiln is provided, that is of relatively simple design and which efficiently uses solar energy. The kiln or solids reactor includes a stationary chamber with a rearward end which receives solid material to be reacted and a forward end through which reacted material is disposed of, and a screw conveyor extending along the bottom of the chamber for slowly advancing the material between the chamber ends. Concentrated solar energy is directed to an aperture at the forward end of the chamber to heat the solid material moving along the bottom of the chamber. The solar energy canmore » be reflected from a mirror facing at an upward incline, through the aperture and against a heat-absorbing material near the top of the chamber, which moves towards the rear of the chamber to distribute heat throughout the chamber. Pumps at the forward and rearward ends of the chamber pump heated sweep gas through the length of the chamber, while minimizing the flow of gas through an open aperture through which concentrated sunlight is received.« less
  • An extruder for feeding finely divided solids is described. And, in combination therewith, means for using gas in various ways to repulverize the finely divided solids. It lends itself to a procedure for continuously charging finely divided solids with water into a high pressure reactor. The high pressure is inherently contained, and the solids are repulverized for use in a reaction.