scholarly journals THE USE OF SEWAGE SLUDGE AND ITS ASH IN CONSTRUCTION AND AGRICULTURE INDUSTRY: A REVIEW

2019 ◽  
Vol 81 (5) ◽  
Author(s):  
Mohd Amin Shafii ◽  
Eunice Chia Mei Ling ◽  
Ekarizan Shaffie
Keyword(s):  
Chemical Composition ◽  
Sewage Sludge ◽  
Soil Stabilization ◽  
Treatment Plant ◽  
Sewage Sludge Ash ◽  
Local Municipalities ◽  
Agriculture Industry ◽  
The World ◽  
Cement Mixture ◽  
Sludge Ash

Harmful sewage sludge generated from wastewater treatment plant being disposed to landfill has long caused major anxiety in local municipalities around the world. In line with the concept of sustainable development practice being adopted around the world, more efforts has looked deeper into ways to reuse this waste material and one of it was the ash generated from this material. This paper review the use of sewage sludge and sewage sludge ash (SSA) in construction and agriculture industry through a multi-faceted review of previous researches done in various industries. Besides reducing the amount of waste in landfill, this solution can also contribute to the reduction of natural resources consumption. It examines in detail how the various burning temperature can affect the sewage sludge ash as well as the potential usage of this ash in asphalt, concrete and cement mixture, soil stabilization and agriculture either as a substitute material, or as a raw and enhancement material. The various chemical composition in this ash enable the SSA to be used in application in multiple industry as each of the respective chemical composition bring enhancement to the end product respectively.

Enhancing soft subgrade soil with a sewage sludge ash/cement mixture and nano-silicon dioxide

2016 ◽  
Vol 75 (7) ◽  
Author(s):  
Deng-Fong Lin ◽  
Huan-Lin Luo ◽  
Darn-Horng Hsiao ◽  
Chien-Ta Chen ◽  
Ming-Du Cai
Keyword(s):  
Sewage Sludge ◽  
Silicon Dioxide ◽  
Sewage Sludge Ash ◽  
Subgrade Soil ◽  
Cement Mixture ◽  
Nano Silicon ◽  
Sludge Ash ◽  
Soft Subgrade

scholarly journals The immobilisation of heavy metals from sewage sludge ash in geopolymer mortars

2020 ◽  
Vol 322 ◽  
pp. 01026
Author(s):  
Mateusz Sitarz ◽  
Tomasz Zdeb ◽  
João Castro Gomes ◽  
Erick Grünhäuser Soares ◽  
Izabela Hager
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Fluidised Bed ◽  
The European Union ◽  
Sewage Sludge Ash ◽  
Sludge Ash

Sewage sludge is a semi-solid waste material created as a result of the sewage treatment of industrial or municipal wastewater. Because the laws and regulations of the European Union require not only a reduction in waste generation but also the preparation of waste for reuse and disposal, it is necessary to look for new methods of the application of sewage sludge as part of sustainable waste management. In this study, ash formed as a result of the combustion of sewage sludge from the sewage treatment plant in Płaszów, Krakow in a fluidised bed furnace at a temperature of around 800°C was used. Sewage sludge ash (SSA) contains over 30% SiO2 and approx. 10% Al2O3, which indicates potential applications in geopolymer materials. In this study, samples of geopolymer mortars with a binder containing sewage sludge ash as well as fly ash (FA) and ground granulated blast furnace slag (GGBFS) were prepared. The mechanical parameters were determined after 2, 7, 14, and 28 days. The results show that the sewage sludge ash-based geopolymer shows binding properties at ambient temperature and, depending on the presence of FA and/or GGBFS, the compressive strength varies from 5 to 45 MPa after 28 days. The aim of the research was also to determine the total content of heavy metals (Sb, As, Cr, Cd, Cu, Ni, Pb, Hg, Zn) in the raw materials used and their leachability from the structure of the hardened materials. Immobilisation of heavy metals is very promising. Based on the results of tests, it seems possible to use SSA in geopolymer materials, but not as the main component of the binder.

scholarly journals Evaluation of Softening of Clayey Soil Stabilized with Sewage Sludge Ash and Lime

2018 ◽  
Vol 4 (4) ◽  
pp. 743 ◽  
Author(s):  
Kamyar Norouzian ◽  
Nader Abbasi ◽  
Jahangir Abedi Koupai
Keyword(s):  
Sewage Sludge ◽  
Soil Stabilization ◽  
Clayey Soil ◽  
Hydrated Lime ◽  
Sewage Sludge Ash ◽  
Optimum Water Content ◽  
Strength Tests ◽  
New Type ◽  
Sludge Ash ◽  
Optimum Water

Production of sewage sludge have raised increasing concerns due to negative environmental effect. Sewage Sludge Ash (SSA) is used as a new type of additive for clay. Laboratory tests were performed on clay samples to study the mechanism of sewage sludge ash (SSA) and Hydrated Lime (HL) soil stabilization. Different SSA contents (0, 5, 10, 15%) and hydrated lime (0, 1, 3 and 5%) were added to the soil samples. 288 samples were prepared, and unconfined compressive strength tests were carried out. The samples were tested under optimum water content and also saturated conditions with three replications. The results of the coefficient of softening indicated that by adding SSA and hydrated lime to clay soil simultaneously, the stabilized clay soils can be applied in the moist and saturated condition. According to the results, the samples of SSA contents 0% with hydrated lime 5% and SSA contents 10% with hydrated lime 5% can be placed in the vicinity of moisture.

scholarly journals The hygrothermal assessment of cement-ash-based mortar

2021 ◽  
Vol 2069 (1) ◽  
pp. 012193
Author(s):  
Barbora Krejcirikova ◽  
Carsten Rode ◽  
Pawel Wargocki ◽  
Jakub Kolarik ◽  
Ruut Peuhkuri
Keyword(s):  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Sorption Isotherms ◽  
Cement Industry ◽  
Partial Replacement ◽  
Porous Structures ◽  
Sewage Sludge Ash ◽  
The World ◽  
Cement Based Materials ◽  
Sludge Ash

Abstract Cement is the second most consumed substance by weight in the world, after water. The growing demand for reduced emissions of CO2 urges the cement industry to find materials with a low CO2 footprint, which calls for cement substitution. An assumption of the study has been that sewage sludge ash (SSA), an industrial by-product, can be applied as a potential cement substitute in cement-based materials without compromising material performance. The study investigated the effect of partial replacement of cement by SSA in mortar on hygrothermal properties of mortar. Two sewage sludge ashes originated from wastewater treatment plants located in the Greater Copenhagen area, Denmark. SSAs consisted of larger particles compared to cement particles; thus cement-ash-based mortar resulted in more porous structures compared to cement-based mortar. The higher porosity was responsible for a decrease of the thermal conductivity of the mortar. Significant differences were recognized in sorption isotherms of individual components, i.e. cement and ashes. However, their effect on the sorption isotherms of the mortars was minor.

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