Abstract Cyanide is one of the toxic materials in environment and included as a hazardous waste. One agro-industrial wastewater containing cyanide from tapioca industry. Various methods, including constructed wetlands, can reduce compounds wastewater. Some plants used wetlands technology include Pistia stratiotes C. zizanioides , L. This study aimed to analyse effect L media height on reduction...

This research was conducted with the aim of knowing Effect using silica sand before and after physical activation on acceleration a 4-stroke gasoline motorcycle engine. by testing 0 – 80 km/hour 40 variations in composition tapioca pellet mixture (1%, 2%, 3%) temperature (150?C, 200?). C, 250?C). The pellets used this study were 10 mm diameter thickness 3 mm, which had been activated for 60 min...