The objective of this research was to study the treatment of Phosphate from wastewater by filter material with shells. Various parameters include pH temperature turbidity DO nitride ammonium and phosphate were investigated and compared before and after filler wastewater. The results show that the quality of wastewater after treatment enhancing with adding filter material with shells. The optimum ratio treatment of phosphate is resulting in maximum values was around 0.05 mg/liter (50% compare with wastewater before treatment) with formula no. 3 that not have time to filler. Moreover the results demonstrated the treatment of Phosphate from wastewater by filter material with shells can be improvement the value of turbidity nitride ammonia and DO for wastewater.

This research work was to study the effect of surface treatment of natural fiber and the effects of type and content of natural fiber on the development of acoustic material from natural rubber foam /natural fiber composites. The surface treatment used for this research work was sodium hydroxide (NaOH) treatment. NaOH Concentrations and treatment times were varied from 0 to 15 %wt. and 0 to 30 min respectively. Natural fibers used for this work were bagasse fiber (BF) and oil palm fiber (OPF). The suitable condition for surface treatment was estimated by fiber length and diameter (L/D) ratio and morphology of natural fiber. The result suggested that L/D ratios tended to increase when NaOH concentrations and/or treatment times increased except for NaOH concentration of 15 %wt. L/D ratios of OPF after surface treatment were changed more than those of BF. The suitable conditions of NaOH treatment for BF and OPF were NaOH concentration of 10 %wt. and surface treatment times of 30 and 10 min respectively. The effects of fiber type and content on sound absorption properties of natural rubber foam /natural fiber composites were investigated by cell characteristics sound absorption coefficient DMA analysis and bulk density. Both treated BF and OPF with suitable treatment condition were varied from content of 0.0 to 10.0 %wt. The result showed that the cell size of composites tended to decrease with addition of natural fiber whereas number of foam cell per unit volume increased. After adding natural fiber more than 2.5 %wt. cell size of composite foam and number of foam cell per unit volume tended to change the inverse direction. Natural fiber in composites enhanced the sound absorption efficiency. Sound absorption coefficient of composites adding BF was more than that of composite adding OPF. The addition of natural fiber enhanced the elasticity of composites and that increased sound absorption efficiency. NaOH treatment led to creation of strong interfacial bonding between natural fiber and natural rubber and enhanced the sound absorption efficiency. Density of NR composite foam increased with increasing natural fiber content.

The study was aimed to investigate the production of banana fiber that was suitable for decorating handicraft basketry examine its effectiveness develop decorative handicraft materials for basketry from fibrous layer on the trunk of the banana tree and promote the obtained knowledge in the community of Plasticseeroong Baanmor Promburi District Singburi Province. The research result could be summarized that the most appropriate production process of dry fibrous layer on the trunk of the banana tree mixed with fibrous layer of paper mulberry was done through mechanical process. After bleaching the mixed fibrous layer was stirred by Hollander beater with the proportion of wet fibrous layer and water at 1:40; 10% of dry of paper mulberry was boiled for three hours in sodium hydroxide at 100 degree Celsius then bleached with 1.5% of hydrogen peroxide with 4% of the dry fibrous layer weight at 90 to 95 degree Celsius for two hours. The mixture of wet fibrous layer on the trunk of the banana tree with wet fibrous layer of paper mulberry was 70:30 which was considered appropriate for decorating handicraft basketry. Concerning the examination of mechanical properties of banana tree fibrous layer according to the standard of TAPPI T it was found that the folding endurance of paper value was 144 (N. m/g); the tensile strength value was 32.16 (N. m/g); the tear resistance value was 26.56 (mN.m2/g); and the bursting strength value was at 1.94 (KPa.m2/g). The fibrous layer obtained from on the trunk of the banana tree was fabricated into decorative basketry materials for example flowers palm leave hats flower key chains bags and paraffin coated flowers for bamboo boxed. The attendants’ satisfaction on the training of the production of decorative handicraft materials of basketry from fibrous layer on the trunk of the banana tree to 30 members of the community of Plasticseeroong Baanmor Promburi District Singburi Province concerning the training service speakers training procedures facilities and training benefits was at high level (90.67%) and at average level (9.33%).

The objective of this research is to improve for material procurement decision support making process by using Lean Concept. The research methodology studied purchasing procurement and whole of production in local country of case study by making Value Streaming Mapping (VSM) calculated of production standard time set buffer time kept inventory and suitable supplier’s capacity. Finally used all data for design and develop computer program into support analyze and follow up delivery goods system to customer. Result of research found this new development program could increase delivery goods to customer efficiency by response with material preparation can improved average On Time Delivery rate at 94.55% and increased productivity from 966 to 1125 pcs/day; therefore case study had well increased local purchasing procurement efficiency reduced purchasing cost to 2.27 million Baht/month reduce Fuel cost at 46225.08 Baht/year on average and reduce greenhouse gas at 4.117 TonCo2e per year on average. They can support highly competitive and rapidly changing of electrical and electronics industrial to sustainable in the further.

This study aims to development of production process of hard metal by tungsten carbide powder with the particle sized of 0.1 - 0.35 µm. This carbide powder were made of recycling cemented carbide tool scraps so it is mixed with Ta = 2.82 % Mo = 0.45 % Nb = 1.22 % Ti = 4.56 % Zr = 0.37 % The shape of the carbide powder are roughly round due to ball milling for 300 hours. It was mixing cobalt 10 % and Paraffin wax 2 % which is found the work piece that running through the process of sintering with a temperature of 1400 °c and 1430 °c have the hardness of 1368.5 and 1346.3 HV respectively. In one hour of holding time process the work piece with 1430 °c of the sintering causes less wear. After the test of turning operation it can be concluded that the tungsten carbide cutting tool provides the equivalent quality as a standard cutting tool.