The partially defatted chia flour (PDCF) is a byproduct obtained from the extraction of chia seed oil (Salvia hispanica L.). Proximal composition and also of fatty acids were carried out to evaluate the nutritional potential of FCPD. High concentrations of proteins (27.50%) and carbohydrates (44.13%) were found, and water absorption capacity equal to 10.53 g.g-1. The values of omega-3 (n-3, 8.0%) and omega-6 (n-6, 3.1%) were found elevated, which makes PDCF a source of these fatty acids. Furthermore, the n-6:n-3 ratio was found to be 1:2.6, a value better than that of the appropriate range (2-5:1) to the needs of the human body. The characteristics presented make FCPD a product of high nutritional value and advantageous use in the formulation of food products.

Soybean hull is an agro-industrial residue produced abundantly both in Brazil and worldwide. It is generated during the dehulling of the grains for oil production. This work aimed to develop materials using low-cost, abundant, and biodegradable raw materials, as soybean hull, corn starch, polyvinyl alcohol (PVA), and glycerol. Five formulations of thermoplastic starch (TPS) were produced containing between 4% and 19% of ground soybean hull and another five formulations of the same composition but with 6% PVA added. The materials were extruded and injected to produce specimens. They were analyzed by FTIR-ATR, mechanical tests, mass loss in water, and dimensional variations.The addition of hull to the TPS did not affect the processability of the materials, and the PVA improved the processability. Hull concentration from 8% to

a b s t r a c tThe use of natural coagulants represents an important step for sustainable environmental technologies. Consequently, substantial research has been conducted to replace chemical coagulants with biodegradable and non-toxic coagulants based on natural compounds. In this study, the efficiency of a natural tannin-based coagulant (Tanfloc SG ® ) was tested as a replacer of ferric chloride, to remove organic matter from the polishing treatment step of swine slaughterhouse wastewater. Experimental designs defining the optimal treatment conditions of the wastewater were used to minimise the measured responses. The apparent colour and turbidity values were satisfactorily reduced (78% and 96%, respectively) by Tanfloc SG ® , with a chemical oxygen demand reduction of 50%. The ferric chloride presented a lower performance than Tanfloc SG ® in almost all analyses. The results showed that Tanfloc SG ® performed excellently in the role of the primary coagulant, favourably replacing ferric chloride in the treatment of coagulation, flocculation and sedimentation of the study effluent.

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