Experimental investigation on shear strength and permeability of a deeply dewatered sewage sludge for use in landfill covers

Zhan, Liangtong; Wilson, Ward

doi:10.1007/s12665-013-2851-8

Cited by 37 publications

(9 citation statements)

References 10 publications

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“…Further, they typically exhibit very low shear strength, very high compressibility, swelling and shrinkage potentials and have very to extremely low permeability (Arulrajah et al (2011, Aydilek et al (2000), Chen et al (2014), Diliūnas et al (2010), Disfani et al (2013Disfani et al ( , 2015, Kayser et al (2011), Klein and Sarsby (2000), Koenig and Bari (2001), Lin et al (2014), Lo et al (2002), O'Kelly (2006O'Kelly ( , 2008aO'Kelly ( , 2008bO'Kelly ( , 2010O'Kelly ( , 2013aO'Kelly ( , 2014aO'Kelly ( , 2016aO'Kelly ( , 2016b, Quille (2009, 2010), Wang et al (1992), Wang and Tseng (1993), Wichmann and Riehl (1997), Zhan et al (2014), to name a few). For landfilled material, chemicals added during the water/ wastewater treatment processes tend to enhance the strength properties but reduce the level and rate of consolidation achievable on-site (O'Kelly and Quille, 2010).…”

Section: Typical Geotechnical Behaviourmentioning

confidence: 99%

“…Experimental investigations have been reported by Aydilek et al (2000), O'Kelly (2005aO'Kelly ( , 2006O'Kelly ( , 2008b, Chen et al (2014), Lin et al (2014) and Zhan et al (2014), to name a few, for biosolids and sewage sludge materials and by Wang et al (1992), Wang and Tseng (1993), O'Kelly (2008aO'Kelly ( , 2010O'Kelly ( , 2016a and O'Kelly and Quille (2009) for alum WTR materials. Recommendations on laboratory consolidation and permeability testing of biosolids and sewage sludge materials are presented in O'Kelly (2016a).…”

Section: Compressibilitymentioning

confidence: 99%

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Geotechnics of municipal sludges and residues for landfilling

O’Kelly

2016

Geotechnical Research

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This paper presents a comprehensive review of reported field and laboratory investigations and theoretical work concerning the geotechnical behaviour/properties of water treatment residue (WTR), biosolids and sewage sludge materials, which are by-products of municipal water and wastewater treatment processes. After describing the backgrounds to the generation of these materials and various disposal options (with a focus on landfilling), including associated geotechnical issues, their physical, geotechnical index, compaction, undrained strength and effective-stress strength properties are described, including the effects of oxidation, biodegradation and viscous gellike pore fluid for biosolids/sewage sludge material. Characteristic compressibility, consolidation and permeability behaviour/properties are also presented for these materials and linked with microstructure and the chemicals added during the treatment processes. The paper then focuses on various geotechnical issues pertinent to landfill (monofill) disposal of these materials, including undrained strength requirements, design strength, on-site and laboratory strength measurements and water content-strength correlations. Since such correlations are material specific, with the geotechnical properties of biosolids, sewage sludge and WTR materials varying between water/wastewater treatment plants, they cannot be applied more widely with confidence. Alternative approaches to predicting undrained strength are described, including a power-law strength relationship with water content, which can be applied more generally. , 2008a). The type and amount of chemicals added depends on the nature of the source water, but primarily on its turbidity and hardness. The coagulants cause the colloidal particles present to aggregate into flocs (with the polyelectrolyte also acting as a binding agent to increase their inherent shear strength) that are more readily separated out by settling processes, removing not only the impurities but also the chemical additives. NotationThe residue so formed is categorised as aluminium sulfate (alum) or iron WTR material depending on the coagulant salt, with the former being the most widely used coagulant in the water treatment industry. Lime-softening sludge, composed of typically 80-95 wt% calcite (Raghu and Hsieh, 1986), is the result of softening hard water before its distribution as drinking water.Biosolids and sewage sludge materials are highly organic residue by-products of municipal waste water treatment, with the organic fraction originating principally from human faeces (primary sludge) and bacterial biomass (secondary sludge) and the inorganic fraction derived from materials such as soil, sediment and inorganic residuals (Haynes et al., 2009). According to the US Environmental Protection Agency (EPA) (2015), sewage sludge refers to the solids separated out during the treatment processes, whereas biosolids refers to treated sewage sludge material that meets regulatory pollutant-and pathogen-control requirements for land applica...

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Section: Typical Geotechnical Behaviourmentioning

confidence: 99%

Section: Compressibilitymentioning

confidence: 99%

Geotechnics of municipal sludges and residues for landfilling

O’Kelly

2016

Geotechnical Research

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“…İSAÇ'ın katı madde içeriği işletmeye göre değişim gösterse de %0.25-12 oranında katı içermektedir [6]. İSAÇ içeriğine göre, yakma, kompost ve gübre malzemesi olarak tarımda [7], kurak arazilerde zemin iyileştirici olarak [8], deponi tesislerinde örtü malzemesi olarak [9], ek yakıt olarak [10], tuğla, fayans ve diğer seramik gibi inşaat malzemesi üretimi [5,[11][12][13] gibi pek çok farklı alanda ekonomik değerlere sahip yeniden kullanılabilecek bir materyaldir. Ancak içme ve kullanma su ihtiyacının sürekli olduğu ve artarak devam ettiği göz önüne alınırsa oluşan İSAÇ'ın da kayda değer orandan artacağı aşikardır.…”

Section: Introductionunclassified

İçme Suyu Aritma Tesi̇si̇ Çamuru İle İyi̇leşti̇ri̇lmi̇ş Zemi̇nlerde CBR Değerleri̇ni̇n Araştirilmasi

Güner

Bağrıaçık

2021

Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi

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Temiz ve güvenilir içme suyuna olan küresel talep katlanarak artmaktadır. Bu talebi karşılamak için, yüzey suyunun arıtılması sırasında su arıtma tesislerinde büyük miktarda çamur oluşur. İçme suyu arıtma tesislerinden gelen çamur (İSAÇ), genellikle tehlikeli olmayan atık olarak düzenli depolama sahalarında bertaraf edilir. Ancak İSAÇ'ın ekonomik olarak sürdürülebilir ve çevre dostu bir şekilde yönetilmesine ihtiyaç duyulmaktadır. Bu ihtiyaç doğrultusunda atıkların bertaraf yöntemlerinden biri, zemin iyileştirmede kullanılmasıdır. İSAÇ'ın bu kapsamda değerlendirilmesi hem ekonomik hem de çevresel açıdan uygun olmaktadır. Çalışmada, İSAÇ'ın zemin iyileştirmede kullanılabilirliği araştırılmıştır. Kil zemine sırasıyla %5, %7.5, %10, %12.5 ve %15 oranlarında İSAÇ ilave edilerek karışımın Kaliforniya Taşıma Oranı (CBR) belirlenmiştir. Kil zemine ilave edilen İSAÇ oranına bağlı olarak CBR değerlerinde %75'e varan iyileşmeler gözlenmiştir. Ayrıca, kil bir zeminin iyileştirmesinde CBR bakımından İSAÇ'ın optimum oranı %12.5 olarak belirlenmiştir. Sonuç olarak, İSAÇ'ın geoteknik mühendisliğinde zemin iyileştirmede kullanılabilecek alternatif bir atık olduğu düşünülmektedir.

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“…Currently, the global annual output of wet sewage [7] is 2.241 × 10 −7 t. Wet sewage is usually disposed by concentrate dewatering and then stored in security landfills. In addition to a few organic substances, wet sewage contains inorganic substances [8][9][10] that are rich in silicon and aluminum. Studies show that dewatered sludge can be transformed into granular ash after high temperature burning.…”

Section: Introductionmentioning

confidence: 99%

The Adsorption Capacity, Pore Structure, and Thermal Behavior of the Modified Clay Containing SSA

Zhang

Dong

et al. 2016

Advances in Materials Science and Engineering

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Sewage sludge ash (SSA) was created by burning municipal sludge. The potential of clay containing 1 or 3 or 5% SSA was assessed for use as a landfill liner-soil material. Batch adsorption, low temperature N2adsorption, and TG-DTA tests were performed to evaluate the adsorption capacity, micropore structure, thermostability, and components of soils under Cr(VI) and Pb(II) chemical solutions. With the increasing amount of SSA in modified clay, the adsorption capacity of Cr(VI) and Pb(II) to the modified clay increases gradually. After absorption, the pore size of modified clay ranges from 2 nm to 8 nm. With the increasing amount of absorption, the pore volume decreases and the specific surface area increases. With the increasing of adsorption concentration of Cr(VI) and Pb(II), the mass loss percentage of modified clay increases to 23.4% and 12.6%, respectively. The modified clay containing SSA may be used as a good barrier material to attenuate contamination of Cr(VI) and Pb(II) in landfills.

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Experimental investigation on shear strength and permeability of a deeply dewatered sewage sludge for use in landfill covers

Cited by 37 publications

References 10 publications

Geotechnics of municipal sludges and residues for landfilling

Geotechnics of municipal sludges and residues for landfilling

İçme Suyu Aritma Tesi̇si̇ Çamuru İle İyi̇leşti̇ri̇lmi̇ş Zemi̇nlerde CBR Değerleri̇ni̇n Araştirilmasi

The Adsorption Capacity, Pore Structure, and Thermal Behavior of the Modified Clay Containing SSA

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