| Author | Tran Triet |
| Call Number | AIT RSPR no.NR-93-03 |
| Subject(s) | Water--Pollution--Toxicology
|
| Note | A research study submitted as a partial fulfilment for the requirement of the degree of Master of Science, School of Environment, Resource and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Research studies project report ; no. NR-93-03 |
| Abstract | Tapioca is one of the most important root crops of the world.
The production of starch from tapioca releases large amounts of
waste water. Although there have been many researches on the
environmental impacts of high levels of BOD and COD of waste water
from tapioca starch industry, the toxicological effects of this
type of waste water has not yet been carefully studied.
This research is designed to study the toxicological effects
of waste water from tapioca starch industry by using two toxicity
tests: Duckweed and Microtox.
In this study, toxicity of the incoming water and two types of
waste water from a tapioca starch factory were determined. Samples
of waste water before treatment showed high toxicity levels when
test ed by both Microtox and Duckweed. Samples of waste water after
treatment appeared to be nontoxic as test ed by Microtox , but they
still revealed a toxicological effect when tested by Duckweed test.
Incoming water samples, which were used as a reference, s howed no
toxic effect at all.
There is a close relation between level s of toxicity and total
cyanide contents of the samples. Toxicity of these samples
decreased significantly within seven days.
As investigated by the research, toxicity of waste water from
tapioca starch industry has a strongly harmful effect on aquatic
organisms and vegetations of the surrounding environment of starch mills. |
| Year | 1993 |
| Corresponding Series Added Entry | Asian Institute of Technology. Research studies project report ; no. NR-93-03 |
| Type | Research Study Project Report (RSPR) |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Development and Sustainability (DDS) |
| Academic Program/FoS | Natural Resources Management (NRM) |
| Chairperson(s) | Bengtsson, Bengt-Erik; |
| Examination Committee(s) | Reutergardh, Lars Baetz;Yakupitiyage, Amararatne; |
| Scholarship Donor(s) | Swedish International Development Agency; |
| Degree | Research Studies Project Report (M.Sc.) - Asian Institute of Technology, 1993 |