Avaliação de sistema de leito cultivado com a macrófita Sagittaria montevidensis Cham. e Schltdl. Para tratamento de águas urbanas poluídas com águas residuárias estudo de caso: Ribeirão dos Muller

• Ano de defesa: 2008
• Autor(a) principal: Bregunce, Denise Teixeira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Positivo; Brasil; Pós-Graduação; Programa de Pós-Graduação em Gestão Ambiental; UP
• Palavras-chave em Português: Águas residuárias - Tratamento; Saneamento ambiental; Macrófitas; CNPQ::CIENCIAS BIOLOGICAS; CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA
• Link de acesso: https://repositorio.cruzeirodosul.edu.br/handle/123456789/2354

The Ribeirão dos Müller places in the region west of the city of Curitiba, drains a composed area of 10,29 km 2 for residences, commerce and industries, and crosses all the extension of the Campus of the Universidade Positivo. As many rivers of the city, the Ribeirão dos Müller comes passing for a process of degradation due to pollution caused mainly for domestic wastewater. This work aimed to evaluate a bed cultivated water treatment system, designed for the treatment of water polluted by urban wastewater. The system uses the macrophyte 6DJLWWDULD PRQWHYLGHQVLV for both organic matter and coli forms removal. An initial evaluation of the water from the Ribeirão dos Müller was conducted in order to characterize the system input. The results showed a high degree of pollution, mainly due to domestic wastewater. The water quality parameters ranged between 1,14 ± 0,94 mg.L -1 for dissolved oxygen (OD), 329,36 ± 351,.22 mg.L -1 for dissolved solids (SD), 250,82 ± 186,48 mg.L -1 for chemical oxygen demand (COD), and 1,55 ± 0,04 mg.L -1 for lead (Pb). Furthermore, the water samples showed an average number of 16 x 10 6 for total coli forms (CT) and 10 x 10 6 for thermo-tolerant coli forms (CF) with the presence of (VFKHULFKLD FROL. The system was monitored and operated during two different periods of time. The main components of the system are water intake, transfer pump, distribution reservoir and the vegetated (cultivated) bed. The filter, that constitutes the cultivated bed, was composed by layers of 5-crushed stone, 2-crushed stone, porcelain and medium sand, and was also used to support the plants. The root system of the plants used for the treatment process presents a large contact area, a great aerenchyma percentage and a low temperature protection, which help both the odor removal and the biological removal efficiency. The system hydraulic detention time (HDT) resulted about 10 hours for a 5.600 L.d -1 flow. The system overall efficiency was 61.68 ± 21.34 % for total solids (ST), 56.11 ± 28.84 % for total volatile solids (STV), 61.86 ± 32.04 % for volatile suspended solids (VSS), and 65.51 ± 32.99 % for total suspended solids (TSS). The pH values ranged from 5.8 to 8.9 with stability for alkalinity and volatile acids. The average COD removal efficiency was 63.76 ± 14.30 % for the first monitoring period and 61.32 ± 21.17 % for the second one. In relation to the biological removal, the first and second monitoring period efficiencies were 96.7 % and 95.9 % for TC and 95.8 % and 99.99 % for CF with reduction of ( FROL. On the other hand, the system did not show satisfactory results for nitrogen and phosphorus removals. In short, the results indicated a water quality improvement. However, the effluent from the bed cultivated water treatment system requires a post treatment to improve the nitrogen and phosphorus removal.