Coagulation is a process of destabilizing colloidal charges with a substance called coagulant. This research studies the coagulation of synthetic sludge water samples using commercial Al2SO4 (alum) coagulant. Coagulation was carried out using the jar test method and magnetic stirrer with variations in speed of 20, 30, 40, 50 rpm and time of 8, 10, 12, 14 minutes. Water quality parameters observ…
Sago waste is a biomaterial produced from the sago-making industry. This material is generally discharged into rivers that are located around the sago-making industry so that it can cause environmental problems and silting of the river. The purpose of this study was to utilize sago waste as an adsorbent in improving the qualityof peat water. In this research, the sago waste that has …
In this research synthesis of hydroxyapatite (HAp) was carried out using Geloina coaxans shells as calcium precursors and (NH4)2HPO4 as phosphate sources through variations eggshell membrane mass (MCT) assisted of microwaves. Hydroxyapatite (HAp) is can be used in the medical, adsorbent and catalyst fields. Analysis of X-Ray Fluorescence (XRF) shows that the main chemical composition in the Gel…
Hydroxyapatite (HAp) is a stable composition of calcium phosphate and is an inorganic material in human hard tissues such as bones and teeth. Hydroxyapatite synthesis from lokan (Geloina coaxans) shells using egg shell biotemplate has been successfully carried out. Lokan powder (Geolina coaxans) calcined 1000 oC for 12 hours to obtain CaO which was analyzed using X-Ray Fluorescence (XRF). XRF a…
A comparative study of magnetic susceptibility of seawater on West and East coast of central Sumatra using the Quincke method has been done. The amount of sea water was collected for 500 ml of location. The number of sample location are 24 points from three West coast locations of Sumatra and one from East coast Sumatera. The method used for sampling is a distance function with a range of 300…
Supply Chain Management practices, competitive advantage, and company performance are needed by development of in industry or company at this time. A study aimed to assess the influence of Supply Chain Management (SCM) on performance competitive advantage of companies and the effect of competitive advantage on company performance. A study also to determine the influence of mediation on competit…
The purpose of this study was to determine the effect of recruitment and job placement on performance through job satisfaction as an intervening variable at PT. Tri Bakti Sarimas Factory Section District. Kuantan Singingi. The study was conducted at PT. Tri Bakti Sarimas (TBS) located in PKS 1 Bukit payung, Pantai Village, district. Kuantan Mudik, Kuantan Singingi Regency. With the number …
This research is motivated since FKIP Riau University held competitions such as the Olympics, making Pekanbaru 1 High School students motivated to continue to try to participate in the debate competition activities held by FKIP Riau University through its Olympic Event and even student activities are fully supported by the school. This research was conducted at SMA Negeri 1 Pekanbaru. A series …
Performance is the result or results achieved during a certain period in the implementation of the tasks compared to, such as work standards, targets or targets or criteria that have been agreed upon in advance and agreed upon. The purpose of this study was to study leadership style and work motivation on the performance of Riau University Hospital. This type of research is quantitative de…
This study aims to examine the influence of leadership on employee work performance through supervision and organizational culture as an intervening variable in the office of agriculture and fisheries Indragiri Hulu district. The population in this study were employees of agriculture and fisheries Indragiri Hulu district is 157 people. Primary data were collected by questionnaire as an instrume…
This research aims to analyze the influence of students’ understanding of diversity on their learning outcomes at Pancasila and civic education (PPKn) study program of Universitas Riau. The research questions are formulated as follows: how is the students’ understanding of diversity at PPKn study program of Universitas Riau; and how is the student's learning outcomes in Pancasila education …
The analysis of aquifer potential has been done in the Rumbai Pesisir District of Pekanbaru City by using the Schlumberger configuration geoelectric method. Data was taken from four villages in Rumbai Pesisir Subdistrict, in Lembah Damai, Limbungan, Limbungan Baru and Meranti Pandak. The result obtained using progress software showed that each location has aquifer with different layer and thick…
This research is motivated by the problem of security and comfort that is disturbed in the Riau University campus environment which is caused by people who commit acts that violate the law and could be detrimental to others in the campus area. The formulation of the problem in this study is how is the perception of Riau university students about the role of security guards at the Riau Universit…
This research was conducted in Februari 2017 at PT. Bangkinang Latex Company of Tangkerang Tengah Pekanbaru. The aim of this study was to analysis the negative effects such as air pollution from the waste of the latex factory to the community around the factory and to identify the influenced factors, such as: More over, the collecting data technique in this study was observation and interview.…
This research was purposed to find out the effect of leadership, motivation, and training on employee performance at Dinas Perdagangan Usaha Mikro Kecil in Kampar District. The population in this study included all employess in the Dinas Perdagangan Usaha Mikro Kecil in Kampar District, wich numbered 48 employee. Primery data were collected by questionnary as an instrument to prove the results…
This research is motivated by a problem that arises when observations made by researchers, namely the demonstration of the University of Riau students on the implementation of the task of the general election commission. Students who are referred to as intellectuals who are considered critical of the political conditions in Indonesia, of course have a deep perception or view of the implementati…
Mapping of the level of pollution of Siak river has been carried out before and after the filtration system with 2 times of filtering based on physical parameters using the experimental method. This research was conducted by measuring the conductivity value, pH, and calculating the TDS value. The sampel used were water taken at 30 points above the surface of the Siak River in area A with coordi…
South Korea and North Korea split into two countries on 25 June 1950, split into two sovereign States as a result of World War II which was later justified through the Cold War. South Korea underwent a security dilemma as North Korea began developing its nuclear program. South Korea is at a dilemma. On the one hand this country needs to increase its military physical strength and strengthen mil…
This study aims to analyze the influence of variable Gross Domestic Regional Product (GDRP), population, and local taxes to District Own Source Revenue in Siak using time series data of the year 2005-2018. The method used in this research is descriptive and quantitative methods. The analysis model that used is multiple linear regression analysis with the techniques of Ordinary Least Square (OL…
This study aims to determine the net income and gross income obtained in the wet sago business in Kuala Kampar District, Pelalawan Regency and to analyze the feasibility of wet sago business in the Kuala Kampar District, Pelalawan Regency. The research method used in this study is a descriptive method in which data that has been taken and collected from research objects which are then compiled…