Response surface methodology applied to tropical freshwater treatment

Autor(es)

Arruda, Priscila Morgon ^[1] ; Pereira-Filho, Edenir Rodrigues ^[2] ; Libanio, Marcelo ^[3] ; Fagnani, Enelton ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Technol, Rua Paschoal Marmo 1888, BR-13484332 Limeira, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, Sao Carlos - Brazil

^[3] Univ Fed Minas Gerais, Dept Hydraul Engn & Water Resources, Engn Coll, Belo Horizonte, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL TECHNOLOGY; v. 41, n. 7, p. 901-911, MAR 20 2020.
• Citações Web of Science: 4

Resumo

This paper presents the profits and disadvantages of the chemometrics approach instead of the one-factor-at-a-time (OFAT) coagulation diagram approach for tropical water physicochemical treatment. Central composite design associate to response surface methodology (CCD-RSM) is used to find the real best conditions for coagulant dosage and pH aiming at high-turbidity removal. The number of experiments needed to chemometrics model construction (12) is comparatively smaller than that used in the coagulation diagram (84), saving financial and environmental resources. Arguments for Water Treatment Plants (WTP) considering the replacement of coagulation diagram approach by the CCD-RSM approach in drinking water treatment are presented. Chemometrics models are all constructed on a free software platform, providing the best pH within the range 7.7-8.1, and the best coagulant dosage (polyaluminium chloride, PAC) between 2.0 and 3.1 mg Al2O3 L-1 (equivalent in mass). CCD-RSM provides a faster, lower-cost and more reliable alternative tool for WTP decision-making instead of the OFAT model, mainly for waters more affected by seasonal effects as can be seen in tropical and subtropical countries. (AU)

• Processo FAPESP: 15/14137-3 - Otimização do ensaio de jar test utilizando-se técnicas quimiométricas
• Beneficiário: Priscila Morgon Arruda
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica