Development of drainage water quality from a landfill cover built with secondary construction materials

Abstract

The aim of this study was to evaluate the drainage water quality from a landfill cover built with secondary construction materials (SCM), fly ash (FA), bottom ash (BA) sewage sludge, compost and its changes over time. Column tests, physical simulation models and a full scale field test were conducted. While the laboratory tests showed a clear trend for all studied constituents towards reduced concentrations over time, the concentrations in the field fluctuated considerably. The primary contaminants in the drainage water were Cl(-), N, dissolved organic matter and Cd, Cu, Ni, Zn with initial concentrations one to three orders of magnitude above the discharge values to the local recipient. Using a sludge/FA mixture in the protection layer resulted in less contaminated drainage water compared to a sludge/BA mixture. If the leaching conditions in the landfill cover change from reduced to oxidized, the release of trace elements from ashes is expected to last about one decade longer while the release of N and organic matter from the sludge can be shortened with about two-three decades. The observed concentration levels and their expected development over time require drainage water treatment for at least three to four decades before the water can be discharged directly to the recipient.

Sistema De Cobertura Final De Um Aterro Sanitário Para a RMB De Belém-Pa Com Emprego De Resíduos Da Construção Civil

“…A camada de cobertura final, objeto deste estudo, é uma medida de proteção ambiental constituída de multicamadas que serve para reduzir a infiltração de água para o lixo depositado e para minimizar emissões de gás do aterro para a atmosfera (TRAVAR et al, 2015), além de reduzir a ocorrência de outros inconvenientes como odores e vetores de doenças. Segundo a NBR 13896/97 a concepção de uma camada de cobertura final de um aterro exige pouca manutenção e deve ser prevista no plano de encerramento do aterro, de forma minimizar a infiltração de água na célula, não estar sujeita a erosão, acomodar assentamento sem fratura e possuir um coeficiente de permeabilidade inferior ao solo natural da área do aterro (ABNT, 1997 …”

Analysis of Management and Environmental Effects of Municipal Solid Waste Due to Inefficient Practices Through People’s Perception in Gilgit City, Gilgit Baltistan, Pakistan

“…Solid waste disposal creates a great problem for land and air degradation if it is dumped openly (Hai and Ali, 2005) so proper landfills are required with proper covering (Travar et al, 2015). FGDs and personal interviews have revealed that due to the increase in population the amount of waste is increasing every day and is creating pressure on dumping site.…”

Selection of Landfill Cover Materials Based on Data Envelopment Analysis (DEA)—A Case Study on Four Typical Covering Materials

“…Currently, landfill covers are made of either natural materials, which primarily include compacted clay and modified clays with stabilizing additives or synthetic materials, such as geocomposites, polymer composites, and painting materials [10][11][12][13][14]. Natural materials are easily obtainable, affordable, and accompanied by stable engineering performance.…”