Title: Technical and Economic Viability for Low-Cost Graywater Treatments: Comparison Between Worm Humus Filter and Wetland

Abstract:-- To reduce the potable water consumption in single-family homes and to ensure quality water to meet the growing demand for water resources, studied the grey water reuse from the lavatory, shower and washing machine for non-potable use in toilets and floor washing. Therefore, it was sought to analyze the technical and economic viability for the implementation of a low-cost treatment reuse system that aims to serve low-income families. For this purpose, the consumption was collected in a standard single-family residence and estimated in each sanitary appliance analyzed. Aiming to meet the current legislations about the quality water a comparison was made between treatment earthworm humus and wetlands, aiming to obtain the best solution that meet the technical, economic and environmental factors. To analyze the water quality parameters did the quality analyze of gray and treat water to compare the samples and check if the minimums parameters were attended to. The biological filter system presented reductions in the analyzed parameters, but It didn’t reach the minimum established in the current norms. While the Wetland system presented more satisfactory results when compared to the biological filter. The two analyzed systems presented economic viability, being that the biological filter was the most economically feasible.

Title: Analysis of Relation Between Safety Cost and OHS Performance in Building Construction to Improve Safety Performance

Abstract:-- Number of accidents in construction sector in Indonesia is high, including building construction. The high number of accidents indicates that a good system of safety and health management is required. The purpose of this study is knowing the relationship of safety cost and OHS performance in building construction in Jabodetabek with statistical methods. The result shows that safety cost’ components which have the most influence to control OHS’ risks are rotary lamp, life line, and tools license permit. Moreover, safety cost’ components that influence accidents the most are evacuation route, BPJS, safety vest, and worker’s identity cards.