Uso da Vermicompostagem como alternativa de tratamento do lodo de ETA

Abstract

Sludge generated from water treatment can be efficiently managed through vermicomposting. This work aimed to reuse sludge from the Water Treatment Plant to produce vermicompost from organic waste and apply it to plant cultivation. The methodology consisted of assembling an aerobic vermicompost bin, using 70% dry foliage, 20% organic matter, 5% sludge and 5% earthworms. After the process, the final compost was tested in two sowing groups, organized in triplicate: Group 1 received the vermicompost mixed with an inert compost, while Group 2 used only the inert compost to plant coriander seeds. The experiment was monitored for 31 days, evaluating the temperature, humidity of the compost and physical characteristics of the plants (stem and leaves). The results showed that 100% of the coriander seeds in Group 1 germinated and developed, while in Group 2 only 33.3% germinated, with the rest not showing development. Therefore, it is inferred that sowings with vermicompost were more efficient, demonstrating that its presence improved soil conditions, favoring both germination and plant growth.