Effect of the application of various wastewater sludges on the properties of sandy soil

Abstract

This research was conducted to determine the effect of various wastewater sludge (domestic type (B), mixture of industry and domestic type (L), aerobic food industry (P), anaerobic food industry (M)) levels on the properties of sandy soil, including pH, electrical conductivity (EC), and the levels of available N (NH4 and NO3) and P, diethylenetriamine pentaaceticacid (DTPA)-extractable microelements and heavy metals. An incubation experiment was performed in which sludges were applied at rates of 0, 40, 80, 120, and 160 tons ha(-1), and the effects on the soil properties were measured over a period of 150 days. Soil pH decreased and electrical conductivity increased with increasing levels of sludge application. The levels of NH4-N, NO3-N, available P, and DTPA-extractable heavy metals also increased with the application rate of the sludge. NO3-N content increased and NH4-N content decreased over time. The most unfavorable effects on soil properties were observed with the B sludge. Other soil characteristics changed according to the sludge properties.

Effects of Sewage Sludge Application on Plant Growth and Soil Characteristics at a Pinus sylvestris var. mongolica Plantation in Horqin Sandy Land

“…It was believed that soil NH 4 + -N converted to NO 3 − -N under the process of nitrification, when N was more available after SS input. Asik et al [74] also, in an incubation experiment, demonstrated change patterns where soil NH 4 + -N content decreased and NO 3 − -N content increased with sludge applied from 0 to 160 t ha −1 over a period of 150 days. In this study, we found that soil NO 3 − -N and NH 4 + -N were significantly positively correlated with soil water content (r = 0.738, p < 0.01; r = 0.640, p < 0.05, respectively) and significantly nega-tively correlated with soil bulk density (r = −0.709, p < 0.01; r = 0.656, p < 0.05, respectively) (Table 4).…”

Aspectos Físicos E Químicos De Espécies Arbóreas Nativas E

“…2018 magnésio e potássio (NASCIMENTO et al, 2004;UNAL;KATKAT, 2009); de fósforo, cálcio e capacidade de troca catiônica (CTC) (NASCIMENTO et al, 2004); da condutividade elétrica, do carbono orgânico total e da atividade microbiana (MINGORANCE et al, 2014); e do fósforo disponível e da condutividade elétrica (UNAL; KATKAT, 2009;ASIK et al, 2015). Apesar dos benefícios que a aplicação do lodo pode proporcionar, alguns componentes indesejáveis dos efluentes podem se concentrar no lodo, tais como metais pesados, poluentes orgânicos e microrganismos patogênicos (SILVA et al, 2001).…”

“…Apesar dos benefícios que a aplicação do lodo pode proporcionar, alguns componentes indesejáveis dos efluentes podem se concentrar no lodo, tais como metais pesados, poluentes orgânicos e microrganismos patogênicos (SILVA et al, 2001). A aplicação do lodo pode causar acúmulo de metais no solo (SILVA et al, 2006;ASIK et al, 2015) e em plantas de milho (SILVA et al, 2006), além de apresentar risco de contaminação das águas subterrâneas com nitrato (DYNIA et al, 2006). Dessa forma o presente trabalho avaliou o desenvolvimento de plantas agrícolas e plantas nativas (aspectos químicos e físicos) com a aplicação de lodo do esgoto doméstico.…”