Abstract. Micro-Hydro electrical power systems are very useful for remote area electrification which does not had supply from the national grid. On the contrary, this area has river streams with high potential for micro-hydro power generation. As such, the UTHM ECO-Hydro Team embarked on a project for erecting a micro-hydro power plant with collaboration with National Education Research Center (NERC), Johor National Park Corporation in Endau Rompin. The existing power generation in this area at present is by using diesel generator gives negative impact on finance and environment in the long run. It supplies power to several including library, offices, open laboratory, chalets and dorms.. At the moment, the micro-hydro system complements the diesel generator, thus becoming a hybrid power generation system.

Adsorption system proved to be an effective method widely used in the treatment of wastewater in many studies. Despite that, most studies on the adsorption in wastewater treatment, focused more on the removal of organic and inorganic substances. The potential of cockle shell (CS) and zeolite (ZEO) as an absorbent has been investigated to obtain the optimum mixing ratio in removing two working parameters such as ammonia nitrogen (NH3-N) and COD. Both CS and ZEO we mixed together in different ratio. The absorption batch study includes the preparation of 5g composite adsorbent, 200 mL of raw leachate sample at pH 8.64, with a shaking speed of 200 rpm for 300 minutes at room temperature. The result shows, the optimum ratio obtained for composite mixture absorbent is (3.5:0.5) and the concentration achieved for the ratio was 415 mg/L NH3-N and 440 mg/L COD. The optimum contact time and absorbent size expressed the result at 300 minute and 1.18 mm with the percentage optimum removal value is 42.46% NH3-N and 90.21% COD; and 50% NH3-N and 85.14% COD, respectively during the experiment.

Adsorption treatment process is one of the techniques that has been employed to treat discharge or effluent from domestic wastewater (DWW), raw water and also landfill leachate. The potential of waste paper sludge (WPS) and activated carbon (AC) as an absorbent has been investigated to obtain the optimum mixing ratio in removing two working parameters such as ammonia nitrogen (NH3-N) and COD. Both WPS and AC were mixed together in different ratio. The absorption batch study is regarding the preparation of 5g composite adsorbent, 200 mL of raw leachate sample at pH 8.64, with a rotational agitation speed of 200 rpm for 300 minutes at room temperature. The result shows, the optimum ratio obtained for composite mixture absorbent is (1:3) and the concentration capacity achieved for the ratio was 870 mg/L and 496 mg/L for NH3-N and COD, respectively. The Langmuir and Freundlich isotherm studies for NH3-N and COD presented the adsorption mechanism that occurs on the composite adsorbent is physical and chemical reaction by obtaining the R2 in both model (< 1) respectively during the experiment.