SciELO - Scientific Electronic Library Online

vol.37 número3Impacto del sistema zanja bordo sobre la cobertura vegetal en pastizales de la región Mixteca, estado de OaxacaPropiedades espectrales de la cubierta de macro túneles y su relación con el crecimiento y rendimiento del chile poblano (Capsicum annuum L.) índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados




Links relacionados

  • Não possue artigos similaresSimilares em SciELO


Terra Latinoamericana

versão On-line ISSN 2395-8030versão impressa ISSN 0187-5779


VELAZQUEZ MACHUCA, Martha Alicia et al. Physical and chemical characterization of sewage sludge biochar. Terra Latinoam [online]. 2019, vol.37, n.3, pp.243-251. ISSN 2395-8030.

Pyrolysis treatment of sewage sludge to generate biochar is one of the current alternatives for environmental management of this waste. The treatment transforms sewage sludge into biochar, conserves some of the characteristics that give it an important agronomic value and reduces its pathogen content. The objective of this study was to analyze the potential use of the sewage sludge biochar obtained from the wastewater treatment plant (WWTP) of Morelia, Michoacán, México, as an agricultural soil improver considering the physical-chemical properties of the material and its content of nutrients and heavy metals as indicators. The sewage sludge was subjected to pyrolysis (SSB) in an experimental scale reactor that uses solar energy, with six residence times and temperature of 280 to 355 oC. The parameters analyzed were: pH EC, OM, Cu, Mn, Zn, Fe available (DTPA and EDTA), elemental composition (C, N, O, Ca, Mg, Na, K, P, S, Cl, Si, Al, Fe, Mn, Cu, Zn, Ti, Ni, Cr, Cd and Pb). The EC of the SSB obtained was from 592 to 5240 μS cm‑1, pH = 6.33 to 7.02, OM = 3.8 to 5.6%, high contents of C, N, P (31 to 38%, 6.5 to 7.7% and 37.7 to 48.8 g kg‑1, respectively), low Na/Ca ratio and a low content of total and available heavy metals. The properties of the SSB obtained indicate that it can be used as an agricultural soil improver since it is a material with high nutrient content and low environmental risk in terms of its low heavy metal content. These results should be complemented with studies on the response of plants to BLR, monitoring of physical-chemical conditions and analysis of organic contaminants in soil and water where this material is applied.

Palavras-chave : agriculture; pollution; recycling; toxic metals.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )