Tratamento de efluentes de indústria de gelatina em biorreator com membrana

• Ano de defesa: 1998
• Autor(a) principal: Abreu, Elenice Tavares
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Brasil; UEM; Maringá, PR
• Palavras-chave em Português: Efluentes industriais; Tratamento; Brasil.; Engenharias; Engenharia Química
• Link de acesso: http://repositorio.uem.br:8080/jspui/handle/1/3841

The gelatin industry produces many complex residues due to its principal raw material, the collagen, which is extracted from the skin, bones and animal's tissue. These residues gives to the effluent a very high organic load, besides sulphides and greasy material, resulting in a difficult treatment of the effluent. With the proposal of using membranes as a separator in secondary treatment, this work studied the viability of using them to treatment the residues of gelatin industry. A bioreactor with membrane was used in the secondary treatment of wastewater of gelatin industry. The start-up of the process was carried out after inoculation with aerobic sludge, from sewer treatment plant of Londrina-PR, previously acclimated to wastewater. The bioreactor with membrane was a stainless steel cylinder with an acrylic visor and total capacity of 550 ml and provided with a magnetic agitator. The separation process was accomplished using polymeric membranes ot ultrafiltration (cellulose acetate and polysulphone ) and microfiltration (cellulose ester), with operation's pressures of 2.0 ± 0.5 bar and 1.0 ± 0.2 bar, respectively. The parameters used to accompany the process efficiency were COD, sulphides, greasy material, MLVSS and turbidity. Removal efficiency of COD was 66% and 86% for the cellulose acetate and Polysulphon ultrafiltration membranes, respectively. These membranes allowed an average reduction of 81% and 85% in the MLVSS, 70% and 85% of greasy material, 44% and 41% of sulfhides and 72% and 84% 01 turbidity, for cellulose acetate and Polysufhon membrane, respectively. The cellulose ester membrane showed better removal efficiency average of COD, turbidity, greasy material, MLVSS and sulphides. The reductions obtained were 92% for COD, 95% for MLVSS, 93% for greasy material, 46% for sulphides and 95% for turbidity. The results obtained showed the potentiality of reactor for the secondary treatment of gelatin industry's residues for the microfiltration membrane which from operation conditions.