This study aims to determine and analyze the combination of aeration systems with Multiple Tray Aerator and Filtration with Rapid Sand Filter in reducing iron (Fe) content in water. The source of water used is shallow well water that is still used by the community. The research design used in this study was One-Group Pretest-Posttest Design. The study located in Pangkep Regency, South Sulawesi Province, and then for the second location in Manado City, North Sulawesi Province. The number of samples with the type of experimental research was 10 with the Purposive Random Sampling technique. The instruments used in this research are Multiple Tray Aerator and Rapid Sand Filter. The results showed that the percentage of reduction using a combination of aeration and filtration systems when averaged for the two study sites, a rate of 58.50 percent obtained. The increase in iron (Fe) content, one of which is influenced by the climate at the research location, will directly increase the water temperature sources in this study, namely surface wells, which will dissolve more iron (Fe) levels. Another factor that affects iron (Fe) levels is the difference in research locations, namely on islands and coasts. This can be seen in the differences in the results of iron (Fe) levels obtained at the two research locations. Those who wish to conduct further study should pay attention to the tool's type and ability and design a more accurate model to minimize energy and cost and a more concrete form.

Seiring dengan pesatnya laju pertumbuhan penduduk dunia berbanding terbalik akan ketersedianya bahan bakar fosil, mendorong ilmuan untuk mencari sumber energi alternatif seperti bioetanol. Penelitian ini bertujuan untuk mengetahui proses pembuatan dan hasil pemurnian bioetanol kulit nanas menggunakan alat distilasi sederhana model kolom refluks. Penelitian ini menggunakan metode eksperimental dengan mempelajari perbandingan massa ragi dan waktu fermentasi terhadap kadar etanol yang dihasilkan. Fermentasi dilakukan menggunakan ragi saccharomyces cerevisiae dengan massa 10, 15, dan 20 gr, dan lama waktu fermentasi 4, 8, 12, dan 16 hari. Setelah didapatkan etanol kemudian diuji kadar dan sifat fisik dari bioetanol yang dihasilkan. Dari hasil penelitian yang didapatkan kadar etanol tertinggi sebesar 44 % dengan massa optimum ragi 15 gr dan waktu fermentasi selama empat hari. Perolehan optimal alat distilasi ini yaitu pada suhu 90°C dengan waktu distilasi selama 40 menit menghasilkan 72 ml distilat. Analisa fisik etanol menunjukan kualitas sesuai dengan SNI.

Groundwater quality in each region is not always the same, this influenced by climate factors, lithology, time, human activities. The purpose of the research that conducted was to see the relationship among the depth of groundwater wells in two different study locations on the concentration of iron (Fe) and Chloride (Cl) levels in each sample. This research located in Mattiro Baji Village, Pangkep Regency, South Sulawesi and Sindulang Satu Urban Village, Manado City, North Sulawesi. The research sample amounted to 18 in the form of bottles of groundwater well samples which evenly taken at the study site. TDS Meter is used to quantity iron (Fe) concentration, and Chlorine Meter is chloride (Cl) levels in samples with mg/L. The outcomes of the study showed that there was no noteworthy relationship between the depth of groundwater wells and the levels of concentration of iron (Fe) and Chloride (Cl). Conditions that are still not contaminated by changes caused by the environment, industrial waste and seawater intrusion.

This research aims to examine the influence of pressure, opportunity, rationalization, capability and integrity toward asset misappropriation through fraud star approach in governmental institution. This research used random sampling method and quantitative research design. Primary data is gathered from government employees through questionnaire, whether ministry or non-ministry with 100 respondents. Descriptive statistics, multiple regression model and classical assumption are used to analyze the data. The result of this research showed that rationalization and capability have positive and significant influence on asset misappropriation. Meanwhile, pressure, opportunity and integrity have no influence on asset misappropriation.

The comfort of a workspace for some people is a thing which is not negotiable. It is believed to raise the motivation of people who work in it. A room which is too hot or too cold may cause people working in it unable to concentrate in a manner that their work performance will not be optimal or will cause some of their work delayed and eventually lead to the depression of the workers themselves. From an economic standpoint, this analysis is important because the greater the capacity of the air conditioning system, the greater the power consumption. The purpose of this study is to determine the amount of heat, which is caused by external and internal factors, that arise in the Engineering building at Engineering Academy of Soroako, and to determine the proper capacity of air conditioners which should be installed in the building. To determine the amount of air conditioning capacity needed in the building, an analysis of the cooling load that occurs in the building is necessary. Geographical position, direction of the wall, and building materials are very influential in the absorption of heat from the outside, while the activities of the occupants, lighting loads, and loads of other electrical equipment affects the amount of heat that arise. CLTD / CLF / SCL methods are used in the calculation, and the data required is measured at the peak of the dry season, which occurs in October. Our analysis and calculations obtained that, according to its function, the number of lamps needed in the building are 26 type PL lamps with a power of 23 watts per lamp. The conduction heat gains and maximum daily infiltration occurred at 2pm with a value of 7.51 kW and 1.98 kW, respectively, while the internal heat gains and maximum daily radiation occurred at 3pm with a value of 1.94 kW and 15.41 kW, respectively. It is concluded that the total maximum daily heat gains that arises is 26.50 kW so the capacity of the air conditioner needed is 6.61 kW or rounded to 8.9 PK.