Rahmat Fadhil

Effectiveness of Floating Micro-Bead Bio-Filter for Ornamental Fish in a Re-Circulating Aquaculture System

Bio-filtration has been widely used in re-circulating aquaculture system to remove waste and to convert toxic ammonia and nitrite into safe end products ornamental fish and other aquatic organisms. However, the study of micro-bead usage as the filter medium has not yet been broadened and thoroughly developed. Therefore, the aim of this study is to construct a biological filter made from polyethylene micro-bead as the filter medium and to analyze its effectiveness in removing waste as well as in converting the toxic organic matter into stable substances. The bio-filter was constructed under a rotational molding process. The tubes, hoses, and piping were made from polyvinyl chloride (PVC) while the fasteners were made from stainless steel and other non-corrosive materials. The effectiveness of this bio-filter was measured by using biochemical oxygen demand (BOD) and total suspended solids (TSS) analysis. Results indicated that this bio-filter is efficient enough to remove suspended solids and BOD. Therefore, this floating micro-bead bio-filter can be used in aquaculture systems.

Model Strategi Pengembangan Sumber Daya Manusia Agroindustri Kopi Gayo dalam Menghadapi Masyarakat Ekonomi ASEAN

. The purpose of this study is to formulate the model of strategy for human resource development (HRD) Gayo coffee agro-industry in the ASEAN Economic Community (AEC) with the approach of soft system methodology (SSM). This research resulted in a conceptual modeling of human resource development strategy for stakeholders agro-industry by increasing productivity in the welfare and sustainability Gayo coffee agro-industry. Human resource development strategy for Gayo coffee agro-industry is a strategic action to deliver the competence and quality of agro-industry actors with high competitiveness, especially in the face of global competition and rivalry in the AEC region through various of HRD capacity building program. The HRD investment is an intellectual investment that has significance for the regional development and improves the welfare of the community in the area of agro-industrial production Gayo coffee.