| Author | Rachanee Lindratsirikul |
| Call Number | AIT Thesis no. EV-88-19 |
| Subject(s) | Water-hyacinth
|
| Note | A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Pilot scale composting of water hyacinth with forced aeration was
undertaken with two sets of experiments: three piles for each set. Each
compost pile was made from chopped water hyacinth and cesspool slurry.
They were experimented upon by the difference of aeration rates and
inoculum seeding sizes. The aeration rates were varied at 0.30, 0.54 and
1.54 m
3/day/kg of volatile solids (VS). The inoculum seeding size of
0.015% was used with and without aeration and 0.03% with aeration. The
chemical and physical parameters were observed throughout the composting
period. Fecal coliform was used as the hygiene indicator.
In piles with variation of forced aeration rates, the minimum rate
3 of 0.3m /day/kg of VS gave the greatest reduction in the organic carbon
and the C/N ratio. The peak temperature of 59.8°C was observed in the
same pile. In the other piles with the variation of size of inoculum
seeding, better results in reduction of organic carbon and C/N ratio were
observed in the non-aerated pile. A maximum temperature of 56. 1°C was
obtained in the same pile. Temperatures beyond 50°C were attained at the
pile center for 4 days in aerated piles with seeding and 8 days in the
non-aerated pile .
In both the experiments, more than 85% of the fecal coliform were
destroyed. For a C/N ratio of 28, the optimum aeration for highest
decomposition rate required is 0.3m3/d/kg of VS . An inoculum seeding of
0. 015% in a pile of C/N ratio 23: 1 without aeration was found to give
better results than those with aeration. |
| Year | 1988 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Samorn Muttamara |
| Examination Committee(s) | Chongrak Polprasert ;Ahn, Kyu-Hong |
| Scholarship Donor(s) | Japanese Government |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1988 |