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