2025-02-212025-02-212022https://repositorio.ifal.edu.br/handle/123456789/873The fruit pulp manufacturing process is a generator of organic waste, containing peels, seeds and bagasse. At the Cooperative of Small Organized Farmers (COOPEAGRO), located in the Municipality of Maragogi-AL, the pulp manufacturing process produces about 25 tons of this waste per month, which can be used to produce organic compounds. In this way, the objective of this work is to develop organic compounds from residues of fruit pulp agroindustry and evaluate them as substrate for the production of lettuce seedlings. The chemical characterization of the residues generated by the agroindustry was carried out for the purpose of sizing possible compost piles, such as the proportion of different residues to be mixed. The residues tested were pineapple, soursop, passion fruit, guava and acerola. To obtain the compounds, a hexagonal compost was used. After 120 days, the results showed that the monitored parameters followed what is indicated in the literature. The compounds were tested for the production of lettuce seedlings, evaluating seedling height, number of leaves, root length and dry mass of root area and root ball stability. The experimental design used was completely randomized, with 4 treatments (T1 = commercial compost; T2 = passion fruit and acerola; T3 = passion fruit and guava; T4 = passion fruit and soursop) and 5 replications. To represent the 16 experimental units, 8 trays of 128 cells were used, divided in half. The treatment of compost with residues of passion fruit and acerola, stood out from the others, presenting a higher average of the aerial part and root system. Chromatography of the passion fruit and acerola compound showed the best results. The technological products generated will be a patent of the organic compounds obtained, an article submitted to the Brazilian Journal of Agroecology and training at different levels.ptResíduos de frutasCompostagemfertilizantesAdubo orgânicoExtensão rural.DissertaçãoAmbiental