Estudo teórico sobre alternativas de tratamentos e aplicações para lodo gerado em processo de reciclagem mecânica de fraldas descartáveis pós-consumo

• Autor(a) principal: Bradfield, Stephanie Walker [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/156129; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-02-22/000890741.pdf
• topic: Resíduos; Resíduos sólidos; Lodo; Reaproveitamento (Sobras, refugos, etc.)

The use, and therefore discard, of disposable baby diapers create an environmental problem in our society, due to its high volume and complexity. It is estimated that 2% of Brazilian's MSW (Municipal Solid Waste) are used disposable diapers which are, today, sent to landfills as the only available option of disposal. Facing this challenge, there is a project of mechanical recycling of post-consumption diapers being developed, aiming to give longer life to raw materials present in this waste, such as plastic and cellulose. However, it is necessary to find treatment and final application options to the organic fraction, which is composed primarily by excrement, superabsorbent polymer and water. Some of the sludge properties were analyzed, such as the BOD and COD, the moisture content and the solids (TS, VS and FS), since these parameters help guide the discussion on treatment processes and sludge disposal. Treatment processes commonly used for sewage sludge have been studied, in order to obtain a sludge that is suitable for some final destinations. Therefore, it was conducted a theoretical study of alternatives of final applications for the resulting sludge. The processes that have been suggested as more ideal for treating this residue from diaper recycling were: thickening, alkaline stabilisation and dewatering. Deeper studies are required to investigate the viability of applicating the resulting sludge on the following areas: use on the ground as fertilizer or soil conditioner and industrial reuse. A third option of destination is to send the resulting sludge to landfills