Analisis Pengaruh Perubahan Arus Dan Tegangan Plasma Terhadap Degradasi Parameter Limbah Cair Kelapa Sawit

Plasma technology is formed by discharge current in the air which produce ionized gas that positive and negative charged. It has a smaller potential energy than kinetic energy among the ion particles. Kinetic energy of ions which large enough will emerge measured plasma flow. This plasma flows proved the capability of degrading liquid waste oil palm indicated by oxidation in the liquid waste that increase after degraded and reduced the value of the electrical conductivity in the liquid waste after degraded. Base on the correlation between the effects of changes in the plasma flows toward Oxidation Reduction Potential (ORP) and EC (Electrical Conductivity) is greater than 90 %

Padang Halal Tourism: Studi Kasus Terhadap City Branding Pada Pusat Perdagangan Kota Padang

Since West Sumatra established itself as the world's best halal tourist destination at the World Halal Tourism Award 2016, Padang City is automatically synonymous with the city of "Halal Tourism". The victory in the category of Worlds Best Halal Culinary Destination and World's Best Halal Destination motivated the Padang City Government and all stakeholders to build awareness that the time for tourism in the City of Padang was to rise up and be aligned with other regions in Indonesia. But the fundamental problem faced in the development of Padang City tourism is the non-specificity of the Padang City city branding with the cities and regencies in West Sumatra. Case studies reveal, that the pattern and concept of city branding halal tourism has not been created yet, there is no guarantee that Padang City holds the main principles and conditions for halal tourism even though the population is predominantly Muslim. Important factors for Muslim tourists may also be partly accommodated, such as halal labels, worship facilities and halal services. Padang must be more consistent in the selection of city branding and conducting socialization and promotion on an ongoing basis

Kinerja Soil Stabilizer Polymer Termoset Terhadap Sifat Fisik dan Sifat Mekanis Tanah Pasir sebagai Material Jalan

Soil stabilizer polymer hasil campuran lateks polyester tak jenuh Yukalac 157 BQTN-EX dengan lateks pekat karet alam (LPKA),  disebut soil stabilizer termoset (SSTS). Campuran ini homogen pada perbandingan 90/10 dan stabil hingga hari ke 28 penyimpanan, dapat digunakan sebagai perekat tanah pasir untuk meningkatkan sifat kekuatannya. Melalui berinteraksi gugus polar pada polester dengan partikel tanah pasir diprediksi dapat membentuk komposit yang memiliki sifat mekanis yang tangguh sebagai material jalan. Hasil uji mekanis komposit tanah yang distabilkan dengan SSTS  meningkat hingga penambahan SSTS 35%. Kuat tekan meningkat hingga penambahan  SSTS 25% dan menurun pada penambahan  lebih tinggi . Daya serap air menurun dengan peningkatan jumlah SSTS. Hasil uji termal terdapat pergeseran puncak dari  polyester, SSTS dan komposit campuran SSTS dengan tanah pasir

Analisis Pengaruh Perubahan Arus dan Tegangan Plasma Terhadap Degradasi Parameter Limbah Cair Kelapa Sawit

Plasma technology is formed by discharge current in the air which produce ionized gas that positive and negative charged. It has a smaller potential energy than kinetic energy among the ion particles. Kinetic energy of ions which large enough will emerge measured plasma flow. This plasma flows proved the capability of degrading liquid waste oil palm indicated by oxidation in the liquid waste that increase after degraded and reduced the value of the electrical conductivity in the liquid waste after degraded. Base on the correlation between the effects of changes in the plasma flows toward Oxidation Reduction Potential (ORP) and EC (Electrical Conductivity) is greater than 90 %

Pemanfaatan Bahan Limbah Pembangkit Listrik Tenaga Uap Pada Campuran Beton K-225

Fly Ash is a waste material from coal burning at thermal power plant. Power Plant Sijantang produces ± 600 tons per day and it is an environmental problem in the area. In this study, the waste fly ash substituted into concrete K-225 or fc'=19.04 MPa amounted to 0%, 5%, 10%, 15%, 20%, 25% and 30%. Results optimum compressive strength at 5% substitution. After that the additive is added Sikamen NN 0.3%, 1.3% and 2.3%.The addition of 2.3% additive produces compressive strength of 298.59 kg / cm2 very much required at 225 kg / cm2. On the addition of additive 0.3% age 28 day compressive strength of 279.19 kg / cm2, the larger the required amount of 225 kg / cm2. Without the addition of additive, compressive strength of 218.35 kg / cm2, less than the required amount of 225 kg / cm2. So for concrete K-225, mix with the substitution of 5% and 0.3% addition of additives can be used as a standardmixture

Kestabilan Model Epidemi Seir dengan Matriks Hurwitz

In this paper, it will be studied local stability of equilibrium points of  a SEIR epidemic model with infectious force in latent, infected and immune period. From the model it will be found investigated the existence and its stability of points its equilibrium by Hurwitz matrices. The local stability of equilibrium points is depending on the value of the basic reproduction number  If   the disease free equilibrium is local asymptotically stable

Pemanfaatan Bahan Limbah Pembangkit Listrik Tenaga Uap Pada Campuran Beton K-225

Fly Ash is a waste material from coal burning at thermal power plant. Power Plant Sijantang produces ± 600 tons per day and it is an environmental problem in the area. In this study, the waste fly ash substituted into concrete K-225 or fc’=19.04 MPa amounted to 0%, 5%, 10%, 15%, 20%, 25% and 30%. Results optimum compressive strength at 5% substitution. After that the additive is added Sikamen NN 0.3%, 1.3% and 2.3%.The addition of 2.3% additive produces compressive strength of 298.59 kg / cm2 very much required at 225 kg / cm2. On the addition of additive 0.3% age 28 day compressive strength of 279.19 kg / cm2, the larger the required amount of 225 kg / cm2. Without the addition of additive, compressive strength of 218.35 kg / cm2, less than the required amount of 225 kg / cm2. So for concrete K-225, mix with the substitution of 5% and 0.3% addition of additives can be used as a standardmixture

Kinerja Soil Stabilizer Polymer Termoset Terhadap Sifat Fisik dan Sifat Mekanis Tanah Pasir Sebagai Material Jalan

Soil stabilizer polymer hasil campuran lateks polyester tak jenuh Yukalac 157 BQTN-EX dengan lateks pekat karet alam (LPKA),  disebut soil stabilizer termoset (SSTS). Campuran ini homogen pada perbandingan 90/10 dan stabil hingga hari ke 28 penyimpanan,dapat digunakan sebagai perekat tanah pasir untuk meningkatkan sifat kekuatannya. Melalui berinteraksi gugus polar pada polester dengan partikel tanah pasir diprediksi dapat membentuk komposit yang memiliki sifat mekanis yang tangguh sebagai material jalan. Hasil uji mekanis komposit tanah yang distabilkan dengan SSTS  meningkat hingga penambahan SSTS 35%. Kuat tekan meningkat hingga penambahan  SSTS 25% dan menurun pada penambahan  lebih tinggi . Daya serap air menurun dengan peningkatan jumlah SSTS. Hasil uji termal terdapat pergeseran puncak dari  polyester, SSTS dan komposit campuran SSTS dengan tanah pasir