| Author | Rames Seejuhn |
| Call Number | AIT Thesis no. EV-02-23 |
| Subject(s) | Cassava industry--Waste disposal
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-02-23 |
| Abstract | This study was conducted at the tapioca-manufacturing factory, which produces two kinds (42% and 55%) of high fructose syrup from tapioca roots used as raw materials. The factory was separated into starch milk plant and syrup plant. This study focused only on starch milk plant. The syrup plant produces starch milk at the average rate of 524 ton roots/d while the water consumption was 3,860 m3 /d. Water consumption in this factory used 16%, 75%, 4% and 5% in washing, extraction, separator units and floor, tool cleaning, respectively. Wastewater was generated 3,416 m3 /d which had high concentration of COD (15,000-28,000 mg/L) and SS (5,300-9,900 mg/L). Solid waste was generated 5%, 1 %, 86% and 8% of sieved peel, washed peel, pulp and sand, clay, respectively. Eco-Mapping was adopted to identify the environmental problems within this factory. There were water and wastewater, solid waste, noise and dust problems. After conducting waste audit, the cleaner production were identified and recommended. Cleaner production technology was suggested to improve the efficiency of process and safety of the workers in the factory. At present the factory faced the problem that sedimentation welt did not work properly. This study showed improvement of the pretreatment in the factory. There were two proposed options; (1) to segregate fruit water by installation sedimentation tank for settling organic contents (protein and fiber) and reduce loading pollutants before discharged to biogas pond and (2) modify the grit chamber prior to WWTP for reducing pollutants (inorganic loading). The latter option could utilise the treated water as the recycle water in washing process. From the modification alternative, daily water supply could be potentially reduced about 315 cubic meters and it was estimated that the reclaim water of 91.5 m3 /d should be adopted for floor cleaning. |
| Year | 2002 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-02-23 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Visvanathan, C. |
| Examination Committee(s) | Chongrak Polprasert ;Muttamara, Samom ;Thammarat Koottatep |
| Scholarship Donor(s) | H.M.(Queen) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2002 |