Dilemma of Sewage Sludge Treatment and Disposal in China

Feng, Leiyu; Luo, Jingyang; Chen, Yinguang

doi:10.1021/acs.est.5b01455

Cited by 242 publications

(71 citation statements)

References 1 publication

(1 reference statement)

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“…Also, these commercial applications could be sources of PIs to WWTPs. China generated 30 million metric tons of sewage sludge (at a moisture content of 80%) per year, 47 leading the estimated annual discharge of ∑PIs through sludge to be 1.81 tonnes, which is only a small fraction compared with the possible emission fluxes of PIs in UV curable resins and food contact materials.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Observation of Emerging Photoinitiator Additives in Household Environment and Sewage Sludge in China

Liu

Lin

et al. 2015

Environ. Sci. Technol.

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Photoinitiators (PIs) are widely used additives in industrial polymerization process, the contamination of which through migration into foodstuffs has been subjected to increasing public scrutiny. Nevertheless, little attention has been paid to the PI residue levels and potential exposure pathways from other environmental compartments. In the present study, the occurrence of PI additives with discrete molecular structures, that is, nine benzophenones (BZPs), four thioxanthones (TXs), and eight amine co-initiators (ACIs), was investigated in commercial products, indoor dust and sewage sludge samples. Nine PI compounds were positively detected in ultraviolet curable resins with concentrations of ∑PIs (sum of the detected PIs) up to 2.51 × 104 ng/g, and 20 PIs can be found in food contact materials with concentrations of ∑PIs varying from 65.9 to 6.93 × 103 ng/g. The wide usage of PIs in commercial products led to the occurrence of 19 PIs in indoor dust, with concentrations of ∑PIs in the range of 245–5.68 × 103 ng/g. Meanwhile, all 21 targeted PIs could be identified in the sewage sludge, with concentrations from 67.6 to 2.03 × 103 ng/g. Distinct PI composition profiles were observed in different investigated compartments, and BZPs were the dominant homologues in all samples. Most of the target PIs were further identified as class III chemicals by toxic hazard estimation algorithm (Toxtree), which indicates the compounds might be of significant toxicity or have reactive functional groups.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Observation of Emerging Photoinitiator Additives in Household Environment and Sewage Sludge in China

Liu

Lin

et al. 2015

Environ. Sci. Technol.

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“…This study is supported by National Natural Science Foundation of China (31101604), Fund for Agricultural Independent Innovation of Jiangsu Province (CX [15] …”

Section: Acknowledgmentsmentioning

confidence: 99%

“…Safe disposal of sewage sludge is a challenge in China. Approximately 78.4 billion metric tons of sewage sludge was derived from more than 2600 wastewater treatment plants in China in 2015 [15]. Agricultural application of sewage sludge is an effective waste disposal and soil amendment technique that can improve the chemical, physical, and biological characteristics of soils [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Sewage Sludge Amendment Combined with Green Manuring to a Coastal Mudflat Salt-Soil in Eastern China: Effects on Soil Physicochemical Properties and Maize Yield

Bai

Zuo

Yan

et al. 2017

International Journal of Agronomy

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Sewage sludge and green manure have become widely used organic amendments to croplands in many regions of the world. However, the amending effect of the combination of sewage sludge with green manuring in reclaimed coastal mudflat salt-soil has been unclear yet. This paper was one of earlier studies to investigate and evaluate the effects of sewage sludge amendment combined with green manuring on selected soil physicochemical properties of the mudflat soil in a rain-fed agroecosystem. The mudflat salt-soil was amended by one-time input of sewage sludge at the rates of 0, 30, 75, 150, and 300 t ha −1 . After green manuring for three consecutive seasons, maize (Zea mays L.) was planted in 2013 and 2014. The results showed that SSA combined with green manuring decreased bulk density, pH, salinity, and exchangeable sodium percentage of the topsoil (0-20 cm soil layer) and increased aggregate stability, cation exchange capacity, and N and P concentration of the topsoil. As a result, the maize yield increased with the increase of SSA rates. Sewage sludge combined with green manuring can be applied in coastal mudflat salt-soil amendment, which provides an innovative way to create arable land resources and safe disposal of sewage sludge.

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“…Besides, part of the reasons for the wide occurrence of NEOPs in natural environments in developing countries could be attributed to the ubiquitous use of combined collection systems which brought great amounts of micro-pollutants from industrial wastewater into WWTPs that are beyond the treatment capacity [13]. Thus, the continued construction of separate drainage systems is necessary and important from the perspective of controlling NEOPs.…”

Section: Potential Approaches To Control the Neopsmentioning

confidence: 99%

Importance of Monitor and Control on New-Emerging Pollutants in Conventional Wastewater Treatment Plants

Luo¹,

Zhang²,

Cao³

et al. 2018

GEP

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The wide occurrence of new-emerging pollutants and their potential environmental and ecological risks have recently caused great public concerns. The paper firstly put forward the severe problem. Then the possible main reasons were analyzed which might attribute to both the inefficient removal of wastewater treatment plants with conventional technology and ignorance of the monitor and control of new-emerging pollutants in the effluents. Also, the complexity and extreme high costs may also make the organizations sidestep the problem. Finally, possible strategies to deal with the problems were proposed. The upgrade of wastewater treatment plants was important and urgent.

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Dilemma of Sewage Sludge Treatment and Disposal in China

Cited by 242 publications

References 1 publication

Observation of Emerging Photoinitiator Additives in Household Environment and Sewage Sludge in China

Observation of Emerging Photoinitiator Additives in Household Environment and Sewage Sludge in China

Sewage Sludge Amendment Combined with Green Manuring to a Coastal Mudflat Salt-Soil in Eastern China: Effects on Soil Physicochemical Properties and Maize Yield

Importance of Monitor and Control on New-Emerging Pollutants in Conventional Wastewater Treatment Plants

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