Feasibility Study for Mining Waste Materials as Sustainable Compost Raw Material Toward Enhanced Landfill Mining

Abstract

Semarang, the capital of Central Java, had a population of 1,814,100 in 2019. City's Jatibarang landfill waste dump was expected to close in 2021. This dump can be rehabilitated by mining the backfill and utilizing mining materials. Herein, a mining feasibility study was conducted to examine the environmental, technical, and financial aspects to determine the condition of the waste dump zone. The environmental feasibility was evaluated using the integrated risk basic approach (IRBA); the technical feasibility was analyzed by conducting laboratory tests and determining the appropriate technology for processing fine materials; and the net present values (NPV), payback period (PP), and internal rate of return (IRR) were calculated for financial feasibility analysis. The total waste heap in zones 1 and 2 was 2,444,700 m 3 , with a fine material composition of 56% and density of 738.05 kg/m 3 . IRBA analysis results indicated a moderately hazardous dump. Thus, this dump can be rehabilitated via landfill mining. The fine material can be converted to granular organic fertilizer for use in the petrochemical industry. Overall, landfill mining is financially feasible, with a NPV value of IDR 11,126,547,566>0, IRR 33%>9.86%, and PP of seven years<planning year.

Methods for Determining the Water Quality Index in Developing Asian Countries: A Review

“…The industrialization process that developing countries continue to promote in their efforts to move towards becoming developed countries, is also one of the causes of the bad water pollution produced [Puspita et al, 2023;Wahyuningrum et al, 2023]. Industrial activities often have a negative impact on water bodies, especially industrial wastewater which carries many dangerous pollutant contaminants [Fida et al, 2023;Hadiwidodo et al, 2023;Ilyas et al, 2019]. The demand for agricultural productivity, which has the effect of massive agricultural activities on the Asian Continent, also produces chemical waste that is dangerous for the quality of clean water [Parris, 2014;Varol & Tokatlı, 2023;Wang et al, 2023].…”

Economic Assessment of Medium and Large-Scale Landfill Mining Business: Case Study Thailand

“…However, research on LFM in Thailand is limited, and only a few studies are on the subject. One of the methods used to evaluate the feasibility of LFM projects is the net present value (NPV) analysis [10]. The NPV is the sum of the present value of cash inflows and outflows over a defined period using a predetermined discount rate.…”

“…Several studies have utilized NPV analysis to evaluate the economic viability of landfill mining projects. For example, research conducted in Belgium examined the NPV values of different landfills, with some demonstrating economic viability while others had negative NPV values [10]. Similarly, a study in China assessed the NPV of a landfill mining project and found that it could yield positive net benefits, although the NPV was sensitive to factors such as land reuse and financial support [5].…”