ANALYSIS OF USE OF WATER TREATMENT SLUDGE, MINING WASTE AND VERMICOMPOSTAGE BIOFERTILIZER FOR THE RECOVERY OF DEGRADED AREA BY MINING

Abstract

The present work evaluated the integrated use of mining waste (RM), sludge from water treatment (Lodo ETA), compost and leachate from the vermicomposting process to recover degraded area by basalt mining. Eight treatments were adopted, composed by the mixture of materials after chemical analysis, which constituted 8 blocks, totaling 64 experimental units, experimentally designed with the following configuration: (A) RM + ETA sludge (1,8% MO), (B) RM+ Compound (1,8% MO), (C) RM + leachate (1,8% MO), (D) RM + Lodo ETA + Compost + leachate (1,8% MO), (E) RM + Lodo ETA (3,2% MO), (F) RM + Compost (3,2% MO), (G) RM + Slurry (3,2% MO), (H) RM + Lodo ETA + Compost + leachate (3,2% MO). After assembling the blocks, 20 black oat seeds were planted in each experimental unit and monitored for 45 days for preliminary verification of plant growth and germination percentage of each treatment in order to replicate the experiment, with the most satisfactory results, so that in the future soil fertility is verified in each of the proposed treatments based on the analysis of dry matter and nutrient content in leaf and root tissue.