The research objectives were aimed to explore the tendency of life quality improvement for the senior people analyze the community leader’s perspectives towards life quality improvement for the senior people and set up as well as observe developing trends towards elderly quality of life for accommodating to ageing society : Ban Jumrung Community Rayong Province. The samples were nine persons purposively selected from relevant experts and skillful people in the community. Tomas T. Macmillan’s Delphi Technique was applied at the standard error of 0.04. The data were collected three times repeatedly and analyzed by Descriptive statistics. The study results revealed that relevant experts and skillful people in the community accordingly agreed (IR  1.50 และ IOC  0.50). The study results would be applied to design plans to construct training patterns to improve life quality for the senior peoplein Ban Jumrung Community Rayong Province. In addition obtained the training pattern could also be used with other neighboring communities as strategic plans for the near future of national life quality improvement for aging society.

The study of Hydrilla (Hydrilla verticillata) effectiveness in water treatment was investigated using completely randomized designs with 4 Hydrilla densities: 0 (control) 30 50 and 70 plants. Each plot was experimented in round cement tanks added with sandy clay on the bottom. Fifty liters of canal water was then filled in. Along 6 weeks of the experiment each tank was aerated with no water exchanged. Results showed that there were no significant differences in values of temperature pH dissolved oxygen conductivity alkalinity hardness nitrite ammonia phosphate and biochemical oxygen demand in every treatment (p > 0.05). However the experimental plot with 50 hydrilla plants showed the best tendency in eradication of phosphate and improvement of biochemical oxygen demand at 86.00 and 45.73 percent respectively. On the other hand the experimental plot with 70 hydrilla plants showed the best tendency in eradication of ammonia and nitrite at 65.00 and 66.66 percent respectively.

In this study pH physical and microbiological qualities of clear and opaque plastic bottled drinking water produced in Buriram Province Thailand were investigated. Samples of bottled drinking water (N=22) were 8 clear plastic bottles and 14 opaque plastic bottles. Results showed that pH value of all samples were in a range of 6.04 ± 0.03 to 7.61 ± 0.01 in which 7 samples were not acceptable according to the criteria for drinking water in sealed containers declared by the Ministry of Public Health of Thailand. Coliform bacteria in all tested samples were less than 1.8 MPN/100mL and none of E. coli was detected. Therefore consumers of bottled drinking water produced from Buriram province should be aware of health safety because some drinking water products were unacceptable in terms of pH value.

The objectives of this study were to investigate communities confidence in their local leaders the locals awareness and factors affecting peoples participation in the water quality management. Data were collected from interviewing 400 households and analyzed with a Logit model. Results showed that the samples were well aware of water quality problems. The communities confidence in their local leaders was in a middle level and the communities’ participation in common activities was low. Factors that affected communities participation in water quality management were confidence in local leaders membership of the conservation groups education level and awareness of water source problem respectively.

At present a problem found in the soft candy producing process in the food producing department of Company Case Study is time-consuming roller washing process due to an ineffective washing process. A roller is washed one by one from a total of 10 roller (a set) in one machine. As a result the operation rates of other producing processes have been forced to delay. The objective of this research is to resolve the problem found in the process of roller washing by designing a machine for washing a set of roller per time. The research begins from examining design concepts of roller washing machine from patents and the current quantity of water and stream used for washing before conducting design of a new soft candy type roller washer machine. And eventually the efficiency of new roller washer machine is compared with current one. The findings indicate that the newly developed design can reduce washing period from 24.48 minutes/set to 5.56 minutes/set and increase operation time by 18.92 minutes or accounting for 77.28 percent. Meanwhile water quantity used in the process is reduced from 124.82 liters/set to 28.35 liters/set and stream quantity used in the process is also contracted from 0.83 kilogram/hour/set to 0.18 kilogram/hour/set. This reduction can save expenses equal to 28795 baht/year. As the budget for making new roller washer machine is 53000 baht and payback period is only 1.84 year.