Organic Waste Recycling

156 Organic waste recycling: technology and management

Table 4.3 Non-methanogenic bacteria

Bacterium Substrate Product

1. Cellulose-splitting
   Acetivibrio cellulolyticus
   Bacteroides fibrisolvens
   B. succinogenes
   Clostridium cellulovorans
   Cl. dissolvens
   Cl. omelianskii
   Cl. papyrosolvens
   Cl. populeti
   Cl. thermocellum
   Neocallimastix frontalis
   Ruminococcus flavefaciens

Cellulose Smaller compounds of low

molecular weight, e.g.

formate, acetate, succinate,

lactate, H 2 , CO 2 , ethanol

2. Semi-cellulose-splitting
   Bacteroides fibrisolvens
   B. ruminicola

Semi-cellulose Xylose, arabinose, galactose,

mannose, formate, butyrate,

lactate, H 2 , CO 2 , propionate,

acetate, succinate

3. Starch-splitting
   Bacterium butylicum
   Bacteroides spp.
   Clostridium acetobutylicum
   Lactobacillus spp.

Starch Acetobutanol, butyrate,

acetate, H 2 , glucose, maltose,

oligosaccharides

4. Protein-splitting
   Bacteroides amylophilus
   B. ruminicola
   Clostridium spp.

Protein Amino acids, organic acids,

NH 3 , H 2 S

5. Fat-splitting
   Alcaligenes spp.
   Bacillus spp.
   Micrococcus spp.
   Pseudomonas spp.
   Streptomyces spp.

Fat and oil Long-chain fatty acids

6. Acetogenic
   Species of the
   Enterbacteriaceae and
   Bacillaceace families

e.g. alcohol,

butyric acid,

aromatic acids,

long-chain fatty

acids

Acetate, H 2 , CO 2

Sources: United Nations (1984); Smith et al. (1988); ESCAP (1975)