Nowadays increasing water pollution has put significant pressure on water resources. Natural organic matter and organic micro-pollutants have been found in potentially harmful concentrations in numerous water sources. Phthalate plasticizers are also micro-pollutants of concern; Di- (2-Ethylhexyl) phthalate (DEHP) is one of the most frequently observed plasticizers in the environment as well as one of the most persistent. The maximum permissible levels of these compounds in drinking water and wastewater discharged to the environment are set at low concentrations. In this research water samples were collected from the New Bang Kaen Canal in Bangkok Thailand (13°4906.1N 100°3042.4E) which receives wastewater from human activities and contains impurities in the water. Several common treatment technologies currently used to remove inorganic and organic contaminants from natural water supplies address serious environmental problems. Properly selected microfiltration membrane processes are elements of effective systems for water purification. Polymeric membranes are of primary interest for membrane separation techniques because they are both practical and effective. However pretreatment before using a microfiltration membrane is necessary for suspended solids reduction. This research used two types of polymeric membranes namely cellulose acetate membrane (CA) and polyvinylidene difluoride membrane (PVDF) and covers the most applicable requirements regarding pretreatment of the water intake. The performance of polymeric membranes for water treatment was also investigated. The water quality of the New Bang Kaen Canal was assessed in terms of turbidity SS and COD. This research has the potential to contribute to the monitoring of water quality in the New Bang Kaen Canal. Water quality monitoring is a fundamental tool for water resources management. The performance of polymeric microfiltration membranes was effective for water and wastewater purification in terms of solids organic substances and micro-pollutant i.e. DEHP compounds. Nevertheless the further development of polymeric membranes regarding fouling on the membrane surface and within pores needs to be improved to increase membrane performance and ameliorate the limitations of microfiltration polymeric membranes.

The study was aimed to investigate motivating factors of state enterprise community relation personnel work efficiency of a state enterprise community relation personnel and the relationship between motivating factors and work efficiency of a state enterprise community relation personnel. The population used in this study was 96 personnel working in a community relations unit. The statistics used in the data analysis included frequency percentage mean and Rho (ρ) to test the correlation coefficients. The results of the study revealed that most respondents were married males who were over 51 years old with bachelors degree earning 20501 baht income salary. The duration of their work was over 20 years in the professional position levels of 4 to 7. It was found that the personnel’s work efficiency was at a high level. When looking into each aspect it was found that the relationship of work advancement and work policy and administration was moderate while the aspects in terms of income responsibility acceptability security governance job description personal life relationship with the management and work condition were relatively low with the 0.05 statistical significance

The study on document management efficiency of support staff at an academic public institution was aimed to investigate 1) the personal characteristics of the academic support staff 2) the efficiency of document management of academic support staff and 3) to analyze the differences of the staff’s document management efficiency classified by their personal characteristics. The population used in this study was 78 technical support staff of a public educational institute. The questionnaire was applied to collect the data analyzed by the frequency percentage mean and standard deviation. The results revealed that most of the respondents were females who were 30 to 39 years old having been working at the institution for 6 – 10 years. The positions held during the investigation were less than five years. Most respondents had never been trained on document management. When considering each aspect it was found that the document reception and delivery were mostly handled while the document writing and keeping were at a high level. However recycling borrowing and destroying document were found average. The results of the comparison of efficiency differences of the document management of academic support staff classified by the personal characteristics showed that gender age educational level position duration of work in the educational institution were moderate revealing the equivalent level of the document management efficiency. The work position held uncovered moderate level of ง the document management efficiency except for the period of work position held for 11 to 15 years which was considered high. Twice or three times of the attendance on the document management training was considered highly efficient as opposed from those once or never being trained. This affects the efficiency of managing different types of documents.

The objectives of this study is to increase efficiency of steam boiler 2.5 ton per hour which used liquid petroleum gas LPG as fuel. bringing heat recovery inside boiler chimney stack to preheat feed water with technology heat Exchanger Economize. Taking the economizer with its pipe length of 1000 mm and 62 mm diameter for 64 pipe is a cross flow with staggered tube to increase water temperature before entering the boiler pass to deaerator The study is carried out to compare the differences and savings of the feed water temperature steam boiler efficiency and fuel consumption between having the economizer installed and uninstalled. reference to study The result after installed the heat exchanger economizer the feed water is passed into steam boiler deaerator higher temperature from 38.30°C to 67.20°C which leads to increase efficiency of steam boiler from 81.59 % to 85.65 % meaning that the fuel consumption of steam boiler will be reduced 4.97 %

The study aims to study the change leadership that affects the organizational culture and work efficiency of the staffs at the operational level and to study the good governance principles that affect the organizational culture and work efficiency of operational staffs at Commercial Concrete Production Business Unit. The population used in the study is 200 operating staffs at Commercial Concrete Production Business Unit using questionnaires for data collection. The data analysis is conducted using descriptive statistics and inferential statistics. The result indicates that change leadership affects organizational culture of operational staffs with statistical significance at 0.05 level. It can predict the organizational culture of operational staffs at 16.30 percent. Good governance principles affect the organizational culture of operational staffs with statistical significance at the level of 0.05. It can predict the organizational culture of operational staffs at 29.50 percent. Change leadership affects the operation efficiency of operational staffs with statistical significance at the level of 0.05. It can predict the work efficiency of operational staffs at 13.80 percent and good governance principles affect the work efficiency of operational staffs with statistical significance at the level of 0.05. It can predict the work efficiency of operational staffs at 28.70 percent.