Occurrence and dissipation mechanism of organic pollutants during the composting of sewage sludge: A critical review

Lü, Huixiong; Chen, Xiaohong; Chen, Mo; Huang, Yuhong; He, Min-Ying; Li, Yanwen; Feng, Nai-Xian; Katsoyiannis, Athanasios; Cai, Quan-Ying

doi:10.1016/j.biortech.2021.124847

Cited by 87 publications

(26 citation statements)

References 91 publications

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“…Similar results were previously reported by Gibson et al [31] and Poulsen and Bester [32]. The concentration levels of DEHP in the final product of composting were generally <100 mg kg −1 , with removal percentages between 50 and 97% [33].…”

Section: Risk Assessmentsupporting

confidence: 89%

Occurrence of Linear Alkylbenzene Sulfonates, Nonylphenol Ethoxylates and Di(2-ethylhexyl)phthalate in Composting Processes: Environmental Risks

et al. 2021

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Composting is an important waste management strategy, providing an economical and environment-friendly approach to sanitizing and stabilizing biosolids for land soil amendment. However, the resulting product can contain a large number of organic pollutants that may have adverse effects on the ecosystem. This paper presents the occurrence of eight widely used organic pollutants (four linear alkylbenzene sulfonates (LAS C10-C13), nonylphenol and its mono- and di-ethoxylates (NPE) and a di(2-ethylhexyl)phthalate (DEHP)) in full-scale composting processes. LAS homologues were detected at the highest concentrations (range of ∑LAS: 2068–9375 mg kg−1 dm), exceeding the limit fixed in the EU Directive draft. The concentration levels of the NPE and DEHP were significantly lower (up to 27.5 and 156.8 mg kg−1 dm, respectively) and did not exceed their fixed limits in the EU Directive draft. Ecotoxicological risk assessment for when compost is amended onto soils has also been evaluated. The concentrations measured represented a medium-low risk for most compounds, although it was not enough in the case of LAS C11 and C13 and NP.

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Section: Risk Assessmentsupporting

confidence: 89%

Occurrence of Linear Alkylbenzene Sulfonates, Nonylphenol Ethoxylates and Di(2-ethylhexyl)phthalate in Composting Processes: Environmental Risks

et al. 2021

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“…Since the presence of organic pollutants in sludge causes further concerns for sludge management, the removal of these substances in sludge has important environmental significance (Li et al, 2015;Dubey et al, 2021;Lü et al, 2021). The organic contaminants detected in different sludge samples are listed in Table 5.…”

Section: Removal Efficiency Of Organic Pollutantsmentioning

confidence: 99%

“…Besides, a large number of organic pollutants in the sewage will be transferred to the sludge in the process of sewage treatment, which would result in the discharge of secondary pollutants during sludge disposal (e.g., incineration, composting, landfill, and agricultural utilization) (Li et al, 2015;Dubey et al, 2021;Lü et al, 2021). Common organic pollutants in sludge include not only traditional persistent organic pollutants (e.g., insecticide, polycyclic aromatic hydrocarbons, dioxin, and polychlorinated biphenyls) but also emerging contaminants (e.g., pharmaceuticals), endocrine-disrupting chemicals (e.g., poly brominated diphenyl ethers) Li et al, 2015;Dubey et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Common organic pollutants in sludge include not only traditional persistent organic pollutants (e.g., insecticide, polycyclic aromatic hydrocarbons, dioxin, and polychlorinated biphenyls) but also emerging contaminants (e.g., pharmaceuticals), endocrine-disrupting chemicals (e.g., poly brominated diphenyl ethers) Li et al, 2015;Dubey et al, 2021). Several studies have reported the possible threats for the environment derived from the agricultural use of sludge that contains toxic organic pollutants (Guo et al, 2020;Lü et al, 2021). For the purpose of fulfilling the requirements of the Environmental Protection Agency, sludge must be strictly disinfected prior to agricultural use or other final disposal (Lü et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have reported the possible threats for the environment derived from the agricultural use of sludge that contains toxic organic pollutants (Guo et al, 2020;Lü et al, 2021). For the purpose of fulfilling the requirements of the Environmental Protection Agency, sludge must be strictly disinfected prior to agricultural use or other final disposal (Lü et al, 2021). Recently, advanced oxidation processes (AOPs) have attracted much attention due to their excellent removal effect of organic pollutants in sludge (Qian et al, 2015;Wang and Li, 2016;Dubey et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Synergetic Effect of Combined CaO2 and Microwave Treatment on Waste Active Sludge Dewaterability and Organic Contaminants’ Removal

Wang

Shang

Liu

et al. 2021

Front. Environ. Sci.

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This study investigated the synergetic effect of the combined calcium peroxide (CaO2) and microwave (MW) treatment on waste active sludge dewatering properties and organic contaminants’ removal. The optimal sludge dewaterability was obtained at CaO2 (20 mg/gVSS)/MW (70°C), and the capillary suction time decreased by 52% compared with raw sludge. Further investigation indicated that total extracellular polymeric substances (EPS), tightly bound EPS, total protein, and protein present in tightly bound EPS were closely correlated with sludge dewaterability. Tryptophan, aromatic protein–like substances and humic acid–like substances were the key compounds that affect sludge dewaterability. The charge neutralization and bridge effect of cation ions were strengthened when combined with MW irradiation. In addition, it was revealed that MW facilitated CaO2 to produce more hydroxyl and superoxide anion radicals. This study confirmed CaO2/MW to be an effective way to improve sludge dewatering and remove organic pollutants from sludge.

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Effects of Biochar on Sludge Composting

Liu¹,

Sun

et al. 2023

Biochar Applications for Wastewater Treatment

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Occurrence and dissipation mechanism of organic pollutants during the composting of sewage sludge: A critical review

Cited by 87 publications

References 91 publications

Occurrence of Linear Alkylbenzene Sulfonates, Nonylphenol Ethoxylates and Di(2-ethylhexyl)phthalate in Composting Processes: Environmental Risks

Occurrence of Linear Alkylbenzene Sulfonates, Nonylphenol Ethoxylates and Di(2-ethylhexyl)phthalate in Composting Processes: Environmental Risks

Synergetic Effect of Combined CaO2 and Microwave Treatment on Waste Active Sludge Dewaterability and Organic Contaminants’ Removal

Effects of Biochar on Sludge Composting

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