Migration and risk assessment of heavy metals in sewage sludge during hydrothermal treatment combined with pyrolysis

Wang, Xingdong; Li, Chunxing; Zhang, Bin; Lin, Jingjiang; Chi, Qiaoqiao; Wang, Yin

doi:10.1016/j.biortech.2016.09.069

Cited by 144 publications

(55 citation statements)

References 38 publications

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“…Among socalled emerging organic contaminants (ECs) the greatest interest of the researchers is paid to pharmaceuticals (PhCs) and personal care products (PCPs) (X. Wang et al, 2016). Verlicchi and Zambello (2015) based on 59 papers published between 2002 and 2015, referring to about 450 treatment trains, investigated the content of PCPs in sewage sludge found the following group: analgesics/anti-inflam, Anti-histamines, hormones, antiseptics, antianginals, anti-hypertensives, hypnotics, insect repellents, antiarrhythmics, anti neoplastics, lipid regulators, UV filters, antibiotics, antiplatelets, psychiatric drugs, synthetic musks, anticoagulants, antiprotozoals, contrast media, non-ionic surfactants, antidiabetics, beta-agonists, receptor antagonists, antiemetics, beta-blockers, stimulants, antifungals, diuretics.…”

Section: Pharmaceuticals (Phcs) and Personal Care Products (Pcps)mentioning

confidence: 99%

The presence of contaminations in sewage sludge – The current situation

Fijałkowski

Rorat

Grobelak

et al. 2017

Journal of Environmental Management

357

151

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Sewage sludge/biosolids are by-wastes of municipal and industrial wastewater treatment. As sources of nutrients (C, N, P) they are widely used in intensive farming where large supplementation of organic matter to maintain fertility and enhance crop yields is needed. However, according to the report of European Commission published in 2010, only 39% of produced sewage sludge is recycled into agriculture in the European Union. This situation occurs mainly due to the fact, that the sewage sludge may contain a dangerous volume of different contaminants. For over decades, a great deal of attention has been focused on total concentration of few heavy metals and pathogenic bacteria Salmonella and Escherichia coli. The Sewage Sludge Directive (86/278/EEC) regulates the allowable limits of Zn, Cu, Ni, Pb, Cd, Cr and Hg and pathogens and allows for recovery of sludge on land under defined sanitary and environmentally sound conditions. In this paper, a review on quality of sewage sludge based on the publications after 2010 has been presented. Nowadays there are several papers focusing on new serious threats to human health and ecosystem occurring in sewage sludge - both chemicals (such as toxic trace elements - Se, Ag, Ti; nanoparticles; polyaromatic hydrocarbons; polychlorinated biphenyl; perfluorinated surfactants, polycyclic musks, siloxanes, pesticides, phenols, sweeteners, personal care products, pharmaceuticals, benzotriazoles) and biological traits (Legionella, Yersinia, Escherichia coli O157:H7).

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Section: Pharmaceuticals (Phcs) and Personal Care Products (Pcps)mentioning

confidence: 99%

The presence of contaminations in sewage sludge – The current situation

Fijałkowski

Rorat

Grobelak

et al. 2017

Journal of Environmental Management

357

151

View full text Add to dashboard Cite

show abstract

“…Even without the necessity of their determination for monitoring the wastewater treatment process, heavy metals would have to be determined in the sewage sludge which is going to be used as soil amendments or fertilizers. Spectroscopic techniques such as atomic absorption spectroscopy (AAS) [1, 23, 59], X-ray diffraction (XRF), or even simple spectrophotometric determination of phosphorus using the molybdenum blue colorimetric standard [60, 61], can be used to determine analytes in extracts and directly in the processed materials. Nowadays AAS is one of the cheapest and therefore still one of the most frequently used techniques for metal determination in sewage sludge and processed sewage sludge [57, 59, 62].…”

Section: Analytical Methods Used For the Development Of Sewage Sludgementioning

confidence: 99%

Analytical and legislative challenges of sewage sludge processing and management

2018

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This article presents the most popular methods of sewage sludge management and analytical techniques which could be a powerful tool in designing new sewage sludge management methods. Chemical analysis is also described as a vital point at the subsequent stages of technological processes control and sewage sludge quality assessment. It is also an instrument essential to maintaining control of processed sewage sludge introduced to the environment as ready-to-use materials. The sludge management method is conditioned by the compliance with legal acts concerning sludge management. The most important of these contain information regarding allowable concentrations of pollutants which can be released into the environment, and the most important declarations concerning sewage sludge management. Various analytical techniques and preparation methods that can be used during the monitoring of the managed and processed sewage sludge are described. The most important are chromatographic techniques, methods based on inductively coupled plasma, and mass spectrometry based methods.Graphical abstract

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“…These are added as a part of feed formulation to enhance the growth of the animals and feed conversion ratio in confined operations [40]. During the HTC process, the heavy metals and minerals present in biomasses have been reported to accumulate within the carbon matrix [41]. For example, in their research, Song et al [11] observed that despite an initial dip, the concentrations of copper and zinc increased by 74% and 86% when temperatures were increased from 140 • C to 220 • C. In a study by the same group [4], copper, zinc, and phosphorus accumulated significantly in hydrochars synthesized from swine manure when processed at temperatures between 160 and 240 • C (1-8 h residence time).…”

Section: Xps Analysismentioning

confidence: 99%

Valorization of Swine Manure into Hydrochars

2019

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There is a significant interest in valorizing swine manure that is produced in enormous quantities. Therefore, considering the high moisture content in swine manure, the objective of this research was to convert manure slurry into hydrochars via hydrothermal carbonization and analyze the yields, pH, energy contents, and thermal and oxidation kinetic parameters. Experiments were performed in triplicate in 250 mL kettle reactors lined with polypropylene at 180 °C, 200 °C, 240 °C, 220 °C, and 260 °C for 24 h. Analyses of the results indicated that the process temperature affected the hydrochar yields, with yield generally decreasing with increasing temperature, but it had little effect on the composition of the hydrochar. The hydrochars were found to have higher volatile contents and H/C and O/C ratios and about 85% of the energy compared to coal. However, the presence of high fraction (35–38%) of ash in hydrochars is a serious concern and needs to be addressed before the complete utilization of hydrochars as fuels. The surface characterization of hydrochars coupled with wet chemistry experiments indicated that hydrochars were equipped with nitrogen functional groups with points of zero charges between 6.76 and 7.85, making them suitable as adsorbents and soil remediation agents and energy storage devices.

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Migration and risk assessment of heavy metals in sewage sludge during hydrothermal treatment combined with pyrolysis

Cited by 144 publications

References 38 publications

The presence of contaminations in sewage sludge – The current situation

The presence of contaminations in sewage sludge – The current situation

Analytical and legislative challenges of sewage sludge processing and management

Valorization of Swine Manure into Hydrochars

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