Cleaner production in the vegetable oil refining industry :the case of Ho Chi Minh city, Vietnam | |
| Author | Huynh Van Nam |
| Call Number | AIT Thesis no.ET-03-15 |
| Subject(s) | Vegetable oil industry--Vietnam--Ho Chi Minh Petroleum refineries--Vietnam--Ho Chi Minh |
| Note | A thesis submitted in paitial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Edible oil industry is an important industry in Vietnam and local refineries about 90% of the local market. These industries mostly deal with refining since domestic raw materials are not adequate and most of the crude edible oil is imported. A study was carried out in two vegetable oil mills in HoChiMinh city to evaluate the cleaner production potential. This was done by carrying out a survey and audit in the factories. The mills surveyed in this industry have adverse environmental impact in the form of wastewater. However, no wastewater treatment plants have been installed so far in these mills. The mills discharge much of wastewater, about 8.5 - 15 1113/ton. Major contribution to the wastewater stream was vacuum water (from steam jet ejector-condensers, which provides vacuum conditions for bleaching and deodorization), around 50 - 60 %. However, this source can be avoided by improving the performance of cooling towers or by treating the vacuum water. However, they do not have any problem in solid waste since most of them are processed into byproduct or sold. They generate a combined solid waste of around 52 kg/ton of refined oil. The oil refineries mostly consume energy in the thermal form, about 60 to 70% of the total. It is mostly used for heating edible oil and vacuum generation. A total of five options were identified, which were studied in detail, and 5 housekeeping options. These developed options if implemented will help to reduce water consumption by 837 m3/day, electricity consumption by 97 kWh/hr, and fuel consumption by 43 kg/hr (in one factory). They require a total investment of 332.4 to 652.5 million VND and save 390 million VND a year. Additionally, cost of investment in WWTP is reduced by 3.8 billion VND. Additionally, there were several other opportunities noted during the audit but due to onsite constraint and incomplete data, further studies are needed to assess their potential. |
| Year | 2003 |
| 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 | Energy Technology (ET) |
| Chairperson(s) | Kumar, Sivanappan |
| Examination Committee(s) | Chettiyappan Visvanathan;Mohanty, Brahmanand |
| Scholarship Donor(s) | Government of France |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2003 |