This research aims to transfer biogas digester construction technology and application of biogas in household to teachers and students of Suksasongkhro Tak school. They were instructed and trained about biogas digester construction and application of biogas produced from animal manure on household cooking in order to reduce LPG use. A total number of 330 teachers and students participated in the training. Results from 5-point scale questionnaire for project evaluation showed that the highest rank was location duration and food ( = 4.37 SD = 0.67). The second was knowledge utilization ( = 4.33 SD = 0.66). The third was trainers ( = 4.26 SD = 0.65) and the lowest was knowledge and understanding ( = 4.13 SD = 0.72). Regarding level of average post-training satisfaction the highest was 4.44 for knowledge and understanding while the lowest was 4.16 for question and answer. For success of the project it was found that every biogas digester done by participants could produce biogas used in place of LPG and could reduce monthly expense by about 1400 – 1500 baht. The total construction cost of biogas production system was 58000 baht with a payback period of 4 years. For students there were 3 science projects about biogas; including 1) comparison of biogas produced from food remains and animal manure; 2) comparison of biogas produced from pigs and cows manure; and 3) comparison of biogas produced from dry and fresh pigs manure.

The objective of study was to design and development of spray drying technology for production of salt powder. The process design and build spray dryer that consisted of three parts: an atomizer a drying column and a dry powder collecting unit. The operation of a spray dryer was co-current flow. A drying column had diameter 0.5 m high 1.5 m and heater 15 kW with automatic temperature control PID 220 V AC power. The test used a saline solution. The inlet air temperature had 5 levels: 130 140 150 160 and 170 ?C. The inlet air velocity had 5 levels: 8 8.5 9 9.5 and 10 m/s. The results were a spray dryer be able to saline solution became salt powder with moisture content between 1.0 - 2.5 % (wet basis) which was in the standard of pure consumable salt (TIS 2086-2544) and can be classified at first class that moisture content had no more than 3 %

The aim of this research was to develop a process for making an inoculum from cow dung. Consequently the inoculum together with food waste was employed to produce hydrogen gas. A total of four different inoculums were experimented including 1). Fresh inoculum 2). Autoclaved inoculum 3). Natural dried inoculum and 4). Hot air dried inoculum. The experimental results revealed that the autoclaved inoculum is the most effective in terms of producing a volatile fatty acid in a maximum value of 9.55 g/l. In addition a maximum hydrogen gas of 136.46 ml/g (of sugar) and also having an average pH of 4.85 and the sugar concentration of 0.33 g/l could be obtained. Furthermore it was found that creating an inoculum by using the autoclaved inoculum produces an inoculum powder having a concentration of 20%. This suggests that the autoclaved inoculum is the best in terms of producing the hydrogen gas from using food waste is 35 litre/litre (of food waste).

Nowadays one of major problems of SMEs is improperly planning the production to serve for the true demand of customers. Therefore this research was set the objective to apply forecasting techniques to predict the right demands and feed them together with other constraints as inputs for the LP model in production planning to get maximum profit and also conform to the restriction constraints such as production processes sales volume labor constraints inventory and investment requirements. As a result from this study the Decomposition Technique by Minitab program was the most accurate technique for sales forecasting of Quilt Products of Hmon-Oon Group. The sales forecasting information was then used as input to a mathematical model (LP) targeting maximized profit processing by Solver program in Microsoft Excel 2010. Eventually the business can gain more benefit by using this method from 358830 Baht in one quarter to 504425 Baht or 40.57% increase. Cost of inventory decreases from 17764 Baht to 16670 Baht or 6.16% decrease. Production labor hours in one quarter decreases from 2984.12 hours to 2378.77 hours or 20.29% decrease

The yield of biodiesel from a base catalyzed transesterification in a batch system is generally low due to the reversed reaction. In addition the process tends to generate high amount of waste water in the washing step. In order to overcome the above problems a continuous process was adopted in this study. Solid alum was used to stop the reaction and filtered off from the biodiesel products. The results showed that biodiesel production from palm oil in a 2.8 liter continuous reactor filled with stainless steel wool acted as a static mixer gave biodiesel of 99.6% purity in 10 minutes at the flow rate of 280 milliliter per minutes. KOH was used as the reaction catalyst at a concentration of 0.75% based on ethanol. The molar ratio of ethanol to oil was 9:1. Three hundred and fifty gram of alum could satisfactorily neutralize one liter of biodiesel.