Utilization of coal fly ash and municipal sewage sludge in agriculture and for reconstruction of soils in disturbed lands: results of case studies from Greece and China

Abstract

Coal fly ash (CFA) and municipal sewage sludge (MSS) management is a great concern worldwide. An alternative gaining high interest, is their use in agriculture and for reclamation of degraded lands. The purpose of this paper was to present very briefly the results of some case studies carried out in China and Greece related to land reclamation and agricultural use of CFA and MSS separately or combined. An experiment in Platanoulia area, central Greece showed clearly that CFA applied together with MSS at appropriate rates increased substantially wheat grain and biomass yield and improved soil quality (increased soil pH, organic matter content, total nitrogen, available P and boron). In a long-term experiment carried out in Huaibei city, Anhui province, China with a reconstructed soil in a subsided land by using CFA, it was found that physicochemical characteristics (infiltration rate, bulk density, total nitrogen, available P and extractable K) tended to be improved over time. In another experiment in Rodia area central Greece, MSS application improved soil quality of limestone mining spoils from bauxite mining activities. Several other experiments with MSS in Greece showed a clear positive effect on cotton and maize yield and on soil quality.

The comparison of regulations on fly ash as a hazardous waste in Indonesia and several countries

“…Selain semen dan beton, fly ash juga dimanfaatkan untuk perbaikan tanah bekas tambang (Tsadilas et al, 2018). Tanah modifikasi tersebut dapat ditumbuhi tanaman seperti gandum.…”

Effects of Coal and Sewage Sludge Ashes on Macronutrient Content in Maize (Zea mays L.) Grown on Soil Contaminated with Eco-Diesel Oil

“…Supplementation of soil with waste ash can improve the balance of nutrients in the environment [21,28,29] and limit the adverse effect of its excessive concentration in the vicinity of landfills or heaps. Ash shows a positive effect on the properties and yield of plants [30][31][32], including energy crops [22,33], and on reclamation of degraded lands [30,34,35]. By using waste ash for fertilization purposes, we satisfy some principles of sustainable growth, mainly the preservation and closed circulation of nutrients in an entire ecosystem.…”

Aproveitamento de lodo de esgoto urbano como substrato para produção de mudas de cedro australiano (Toona ciliata) e aroeira pimenteira (Schinus terebinthifolius)

“…O uso de lodo de esgoto na composição de substratos para produção de mudas de espécies florestais é considerado uma alternativa promissora em função de seu importante valor como condicionador de solo, sendo fonte de matéria orgânica e nutrientes essenciais à planta, além da redução dos custos de produção. Diversos trabalhos apontam alternativas seguras e sustentáveis para destinação do lodo de esgoto, capazes de minimizar os impactos negativos e mesmo reduzir os custos da destinação, como a sua utilização nos segmentos da agricultura e silvicultura [1][2][3][4]. Siqueira et al (2019) [5] estudando diferentes proporções de lodo de esgoto em substrato para produção de mudas de Plathymenia reticulata, observaram que a proporção de 20% de lodo de esgoto resultou em melhor crescimento das mudas, obtendo padrão de crescimento semelhante à produção em substrato comercial.…”