Greenhouse gas mitigation potential from starch industries in Thailand | |
| Author | Patreeya Katsin |
| Call Number | AIT Thesis no.EV-10-12 |
| Subject(s) | Greenhouse gas mitigation--Thailand Starch--Thailand |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Abstract | Wastewater from agro-industries treated in anaerobic ponds emits high GHG. Tapioca starch industry is one of major agro-industries that a ton of starch production generates 10 – 20 m³ of wastewater with high organic material. There are varieties of the treatment process starting from anaerobic pond to high rate anaerobic treatment process. Thus, one of problems is methane emitting to atmosphere. However, methane produced in anaerobic digestion can replace energy. Thus, wastewater generation and treatment process are important data for estimation GHGs reduction potential from tapioca starch factories and cost saving from GHGs utilization. This study was carried out at tapioca starch industry selected. The study was started by questionnaire survey and collection basic data of the factories from primary and secondary data and site survey. The major data were production capacity, energy consumption, wastewater generation, waste generation and wastewater treatment. Lab-scale CSTR was set to estimate methane producing capacity (B0). Finally, the data are used to estimate baseline and project emission followed by 2006 IPCC Guidelines for National Greenhouse Gas Inventories Chapter 6 volume 5 and cost saving from biogas utilization. Presently, there are both aerobic and anaerobic processes in tapioca starch factories. From lab-scale CSTR experiment, the COD influent and effluent are 10,660 and 3,410 mg/l respectively. The yield of total biogas from CSTR was 3.67 L was operated for 7-day-retendtion time. The range of biogas yield per day was 0.047 – 0.92 L containing the methane content of 42.0 – 62.8 %. From the two scenarios of each wastewater treatment, replacement of heavy fuel oil with recovered biogas as a fuel for the boiler gave higher emission reductions than electricity replacement. The GHG reduction from fuel oil replacement scenario of UASB and ABR are 270,924.5 and 266,071.3 tCO₂ per year respectively while GHG reductions from electricity replacement scenario of UASB and ABR are 235,631.5 and 230,276.1 tCO₂ per year respectively. Cost saving of biogas generation from project comes directly from heavy fuel oil replacement. Today, cost of heavy fuel oil is 30 baht per liter. The biogas production from project can replace about 17 million of heavy fuel oil. Thus, factory can reduce cost of heavy fuel oil about 510 million Baht per year. |
| Year | 2010 |
| 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) | Annachhatre, Ajit P.; |
| Examination Committee(s) | Nguyen, Thi Kim Oanh ;Shipin, Oleg V.; |
| Scholarship Donor(s) | National Science and Technology Development Agency (NSTDA),Thailand; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2010 |