Cellulose degradation in municipal solid waste composting with sequential addition of sewage sludge
General Material Designation
[Thesis]
First Statement of Responsibility
M. W. Lau
Subsequent Statement of Responsibility
R. J. McClimans
.PUBLICATION, DISTRIBUTION, ETC
Name of Publisher, Distributor, etc.
State University of New York College of Environmental Science and Forestry
Date of Publication, Distribution, etc.
1992
PHYSICAL DESCRIPTION
Specific Material Designation and Extent of Item
168
DISSERTATION (THESIS) NOTE
Dissertation or thesis details and type of degree
M.S.
Body granting the degree
State University of New York College of Environmental Science and Forestry
Text preceding or following the note
1992
SUMMARY OR ABSTRACT
Text of Note
The increasing cellulose content of solid waste has been identified as an obstacle in municipal solid waste (MSW) composting. Restricted carbon in cellulose delays the decomposition process, and enhances the loss of nitrogen with the production of odor. Compost stocks were established by mixing cafeteria waste and municipal sewage sludge. Sequential addition of sludge, a nitrogen source, in MSW composting was practiced. Compost was generated in a 10-week process. Cellulolytic fungal activity in compost was assessed and major decomposing fungi were identified. Major decomposition activity occurred in the thermophilic temperature range, but extreme temperatures (above 65C) impeded it. Decomposition was also found sensitive to the source and timing of sludge input. Sequential addition of sewage sludge into compost improved cellulose degradation and conserved nitrogen. The drawback in doing this may be the difficulty in meeting compliance with New York State Department of Environmental Conservation regulations for pathogen control in Class I compost. Extreme temperatures (above 65C) were found detrimental to the population of cellulolytic fungi. Some fungi were isolated from the compost: Aspergillus spp., Absidia sp., and Corynascus sepedonium (Emmons) v.Arx from both cellulose and starch media; Aspergillus niger, Mucor sp., and Humicola sp. from the starch medium.