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The Effect of Dolomite Liming on Ex-Waste Disposal as a Media for Growing Green Mustard

Temporary waste collection (TPS) is not carried out with proper management, causing environmental damage. Piles of garbage collected at TPS come from disposal of domestic waste. To handle waste, waste handling procedures must be carried out, namely 3P (collection, transportation and disposal). If handling is not carried out, the land where the TPS is located will experience damage to the ecosystem. According to PP. 18/2008 states that waste management mandates that for each type of waste management efforts are made to limit and reduce it, except for disasters. Soil from piles of garbage changes its natural environment. Chemical elements resulting from the decomposition of waste due to being buried for years produce leachate (waste water). Wastewater damages microorganisms in the soil, especially from inorganic waste. Soil chemical properties are determined by the pH level or what is known as soil acidity (pH <7). Soil acidity can be increased by liming the soil. Limestone can increase calcium in the soil so that it can restore soil fertility and normalize soil pH. Dolomite is one of the agricultural limestone which has material from mountain limestone and shells. Dolomite lime is used to increase the pH of acidic soils or soil pH <7. The purpose of this study was to determine the stability of the former TPS with liming and its effect on mustard plants as phytoremediation. The results of observation and testing of used TPS liming treatment by applying variations of soil waste, dolomite lime, and husk charcoal. The treatments were divided into groups P0 (control), P1, P2, P3 (sand without dolomite). The results showed that the soil pH ratio of 1: 2: 1 (P2) reached a stability of 6.8 compared to other treatments. Meanwhile, from observations of green mustard plants, the highest average number of leaves was 16 on the 21st day, while the stem height was about 5.6 cm (P2). The average root length measured on the 21st day was 12.5 cm (P2). The conclusion is that the higher the dolomite mixing ratio, the soil acidity quality of the waste becomes stable, but the effect on mustard plant growth is not optimal.