Swine wastewater treatment by Fenton's process and integrated methodologies involving coagulation and biofiltration. (15th April 2021)

• Record Type: Journal Article
• Authors: Domingues, Eva; Fernandes, Eryk; Gomes, João; Martins, Rui C.
• Is Part Of: Journal of cleaner production. Volume 293(2021)
• Publication Date: 2021-04-15
• Subjects: Swine wastewater -- Fenton's process -- Coagulation -- Biofiltration -- Corbicula fluminea -- Processes integration; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2021.126105
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: In this work, Fenton's process was evaluated as an alternative treatment of swine effluent. In order to improve depuration, coagulation and biofiltration were integrated with Fenton's peroxidation. With the optimum loads of 750 mg/L of hydrogen peroxide and iron, this process was able to remove 72% of sCOD and lowering Aliivibrio fischeri luminescence inhibition to 65%. On the other hand, integration between Fenton's process and biofiltration removed 91% of sCOD. Whereas, after coagulation sCOD degradation reaches 86%. Regarding to luminescence inhibition, the treatment processes integration can decrease it to about 30%. Coagulation and biofiltration after Fenton's process proved to be able to remove dissolved iron in the treated effluent and thus overcoming Fenton's process major disadvantage. Highlights: Fenton's process is a suitable way to remove sCOD and toxicity from swine wastewater. Biofiltration using C. fluminea used as pre-treatment improves Fenton's peroxidation. Coagulation can lead to an effluent more amenable for Fenton's oxidation. Biofiltration and coagulation remove iron from Fenton's treated wastewater. The integrated technologies are cleaner processes for swine wastewater treatment.