Data/hora: 10/06/2024 10:18:21

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	13/12/2023	
Data da última atualização: 	22/01/2024	
Autoria: 	ALONSO, J. M.; ABREU, A. H. M. de; ANDREOLI, C. V.; TEIXEIRA, P. C.; POLIDORO, J. C.; LELES, P. S. dos S.	
Afiliação: 	JORGE MAKHLOUTA ALONSO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; ALAN HENRIQUE MARQUES DE ABREU, COMPANHIA ESTADUAL DE ÁGUAS E ESGOTOS; CLEVERSON VITÓRIO ANDREOLI, CONSULTORIA E ENGENHARIA AMBIENTAL; PAULO CESAR TEIXEIRA, CNPS; JOSE CARLOS POLIDORO, CNPS; PAULO SÉRGIO DOS SANTOS LELES, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO.	
Título: 	Chemical characteristics and valuation of sewage sludge from four different wastewater treatment plants.	
Ano de publicação: 	2024	
Fonte/Imprenta: 	Environmental Monitoring and Assessment, v. 196, 34, 2024.	
DOI: 	https://doi.org/10.1007/s10661-023-12211-8	
Idioma: 	Inglês	
Conteúdo: 	Sewage sludge contains plant nutrients and organic matter in its composition, making it a potential partial substitute for mineral fertilizers if it meets environmental, agronomic, and sanitary standards. The objective was to evaluate the content of nutrients and heavy metals in the sludge generated in four wastewater treatment stations (WWTPs) in Rio de Janeiro state and assess its potential value and usefulness. The samples of 19 batches from the WTTPs Alegria, Barra da Tijuca, Ilha do Governador, and Sarapuí were analyzed. The WWTPs differ in methods and processes used for treating sewage and sludge. The total contents of C, N, P, K, Ca, Mg, Fe, Al, Na, Co, Mn, As, Ba, Cd, Cr, Cu, Ni, Se, Pb, and Zn were evaluated, as well as the ratio C/N, pH, organic matter content, and electrical conductivity. The grouping of sludge samples was assessed using principal components (PCA) and cluster analysis. The economic valuation of sludge was conducted utilizing the substitute goods method, which compared the sludge’s N-P-K contents with the prices of consolidated nutrient sources. All the evaluated sludge batches exhibited concentrations of heavy metals below the limits allowed by Brazilian law, along with high levels of nutrients and organic matter. Considering the chemical characteristics, all evaluated materials showed potential for agricultural use, but it is crucial to evaluate the microbiological characteristics of sludge batches before agriculture application. PCA and cluster analysis demonstrated that sludge samples from the same WWTP clustered close to each other, demonstrating higher similarity among themselves than with samples from other WWTPs. The sludge had an average added value of U$ 88.46 per megagram, considering the total contents of N, P, and K in its composition. Land application of sewage sludge can reduce the need to purchase mineral fertilizers, thereby supporting the feasibility of reusing this material in the agricultural sector.	
Palavras-Chave: 	Agricultural reuse.	
Thesaurus Nal: 	Biosolids; Fertilizers; Sanitation; Solid wastes; Waste management.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (21372-1) - UPC - AP - DD -  -  -  - DIS