Studying the Effects of Two Various Methods of Composting on the Degradation Levels of Polycyclic Aromatic Hydrocarbons (PAHs) in Sewage Sludge

Poluszyńska, J.; Jarosz‐Krzemińska, Elżbieta; Helios-Rybicka, E.

doi:10.1007/s11270-017-3481-7

Cited by 23 publications

(6 citation statements)

References 18 publications

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“…With the application of vermicompost and subsequent inoculation of the bacteria into the contaminated soil, the decomposition rate of the petroleum compounds increased [32,33]. Dores-Silva et al's results corroborate the data presented in this study [18,34].…”

Section: Discussionsupporting

confidence: 87%

Bioremediation of Polycyclic Aromatic Hydrocarbons in Contaminated Soils Using Vermicompost

Mohammadi‐Moghadam

Khodadadi

Sedehi

et al. 2022

International Journal of Chemical Engineering

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Bioremediation of polycyclic aromatic hydrocarbons (PAHs) in contaminated soils are reported in many literatures. Composting, in addition to bioremediation, can simultaneously increase soil organic matter content and soil fertility and is thus regarded as one of the most cost-effective methods of soil remediation. In this study, biodegradation of phenanthrene (PHE) and pyrene (PYR) is reported by microbial consortia enriched by vermicompost. After soil samples preparation and grinding, the samples were contaminated with 100, 200, and 300 mg/kg of PHE and PYR concentrations and inoculated with three concentrations (2, 4, and 6 wt.%) of vermicompost. PHE and PYR concentrations were analyzed by HPLC during bioremediation. After 70 days, two highly capable microbial consortia were used to remove the pollutants in bioaugmentation conditions. Analysis of their microbial composition revealed that the consortia contain several Proteobacteria phylum bacterial species, and the most common genera were Pseudomonas and Citrobacter. Decontamination rates for PHE and PYR were estimated to be 89% and 83% over 45 days, respectively. Biodegradation kinetics revealed that microbial degradation followed a first-order kinetics. This study provides clear evidence on the biodegradation of PHE and PYR, paving the way for the development of bioremediation technologies for the recovery of polluted ecosystems.

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Section: Discussionsupporting

confidence: 87%

Bioremediation of Polycyclic Aromatic Hydrocarbons in Contaminated Soils Using Vermicompost

Mohammadi‐Moghadam

Khodadadi

Sedehi

et al. 2022

International Journal of Chemical Engineering

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“…In order to minimize the risk of persistent organic pollutants (POPs) that result in soil contamination, all European Union (EU) countries recommend limiting the values of PAHs in sewage sludge for agricultural applications . A working document published by the European Biochar Foundation on sludge presented a cutoff value of 6 mg kg −1 ‐dried material for 11 PAHs (including acenapthene, phenanthrene, fluorene, flouranthene, pyrene, benzo(b)fluoranthene, benzo(j)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene, benzo(g,h,i)perylene and indeno(1,2,3‐cd)pyrene) and 16 US Environmental Protection Agency (EPA) PAHs .…”

Section: Resultsmentioning

confidence: 99%

“…In order to minimize the risk of persistent organic pollutants (POPs) that result in soil contamination, all European Union (EU) countries recommend limiting the values of PAHs in sewage sludge for agricultural applications. 25 indeno(1,2,3-cd)pyrene) 26 and 16 US Environmental Protection Agency (EPA) PAHs. 27 Sixteen PAHs regulated by the US EPA and Europe 27,28 were determined for the raw materials and pyrolysis residues.…”

Section: Pahs In Raw Sludge and Pyrolysis Residuesmentioning

confidence: 99%

Microwave pyrolysis of sludge for potential use as land application and biofuel

Lin

Zeng

Chiang

2019

J of Chemical Tech & Biotech

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BACKGROUND A microwave pyrolysis was conducted to treat two sludge cakes for the production of liquid oil and sludge residues. The application of pyrolysis technology, the safety of land disposal of pyrolysis residue, and the quality of the derived biofuel were evaluated. RESULTS Results indicated that the total pore volume increased with increases in the mesopore size range in the case of both sludge residues after increasing the pyrolysis temperature. Low carbon, hydrogen, and sulfur content and high nitrogen content were observed in the oil derived from the chemical industry sludge. As a result, the pyrolysis liquid chemical sludge oils had heat values of 9600 to 9700 kcal kg−1 at 673–1073 K, which was slightly lower than the 9800–10 000 kcal kg−1 found for the petrochemical sludge. CONCLUSION After pyrolysis, the amount of 16 polyaromatic hydrocarbons (PAHs) in the residue and oil were significantly reduced in both the chemical sludge and petrochemical sludge at 673–1073 K. The high pyrolysis liquid oil heat values for both types of sludge indicated their potential for use as a biofuel to produce energy. The 16 PAH content in the pyrolysis residues was higher than the European standard of 6 mg kg−1, and they were thus not acceptable for soil and agricultural applications. However, as reported in the literature, using a pyrolysis temperature above 1073 K may further reduce the PAH content of the pyrolysis residue to meet regulatory standards. © 2019 Society of Chemical Industry

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“…An enrichment of PAHs over time can be explained by the longer retention time of secondary sludge in comparison with primary sludge. Previous studies reported a large range in the total concentration of PAHs in sewage sludge from Asian, African, and European countries, varying from below detection to 33,000 ng/g dry weight (Cai et al 2007;Man et al 2016;Poluszyńska et al 2017 [1,2,3c,d]pyrene) should be <6 mg kg -1 dry matter. If the ratio is >0.50, the combustion of kerosene, grass, coal, and wood results in the PAH contamination.…”

Section: Organic Pollutantsmentioning

confidence: 98%

“…An enrichment of PAHs over time can be explained by the longer retention time of secondary sludge in comparison with primary sludge. Previous studies reported a large range in the total concentration of PAHs in sewage sludge from Asian, African, and European countries, varying from below detection to 33,000 ng/g dry weight (Cai et al 2007;Man et al 2016;Poluszyńska et al 2017 [a,h]anthracene, benzo[g,h,i]perylene, benzo[j]fluoranthene) should be <6 mg kg -1 dry matter. According to EU regulation, concentration of total PAHs (acenapthene, phenanthrene, fluorene, plouranthene, pyrene, benzo[b;j;k]fluoranthene, benzo [a]pyrene, benzo[g,h,i]perylene, indeno[1,2,3c,d]pyrene) should be <6 mg kg -1 dry matter.…”

Section: Polycyclic Aromatic Hydrocarbons (Pahs) Contents and Sourcesmentioning

confidence: 99%

Use of sewage sludge in agricultural soils: Useful or harmful

Delibacak¹,

Voronina²,

Morachevskaya³

et al. 2020

Eurasian Journal of Soil Science (Ejss)

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Sewage sludge is an important type of organic wastes among the various categories of solid waste. Organic matter resources in soils are relatively low and frequently require replenishment. Therefore, the use of sewage sludge in agricultural soils is a desirable method of their utilisation. The addition of sewage sludge to soils may be an inexpensive and effective alternative to the methods applied currently (mineral fertilisation, manure etc.). In spite of the undisputable advantages resulting from the application of sewage sludge in agriculture, it also involves some serious threats. Among those we should mention the presence of pathogens, heavy metals, and organic pollutants. In the current scenario of increasing global population, the generation of solid wastes like biosolids is bound to increase remarkably. Improper and unscientific disposal of biosolids results in several environmental issues such as surface and groundwater contamination, degradation of land, and food chain contamination. According to the principles of waste management hierarchy, agricultural recycling of biosolids will be a more environmentally preferred option over the traditional disposal methods. Utilizing the potential of biosolids to recycle valuable plant nutrients and as an effective soil amendment will not only help in sustainable management of this waste but also in minimizing the negatives associated with its traditional disposal. Every country must obey their regulations and legislations for managing their sewage sludge as a basic solution for use of sewage sludge in agricultural soil.

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Studying the Effects of Two Various Methods of Composting on the Degradation Levels of Polycyclic Aromatic Hydrocarbons (PAHs) in Sewage Sludge

Cited by 23 publications

References 18 publications

Bioremediation of Polycyclic Aromatic Hydrocarbons in Contaminated Soils Using Vermicompost

Bioremediation of Polycyclic Aromatic Hydrocarbons in Contaminated Soils Using Vermicompost

Microwave pyrolysis of sludge for potential use as land application and biofuel

Use of sewage sludge in agricultural soils: Useful or harmful

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