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Influences of Naphthalene Concentration on Starch Anaerobic Digestion: Focusing on Digestion Performance, Extracellular Polymeric Substances and Function Microbial Community

Author

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  • Yilin Yao

    (School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao 266237, China)

  • Jingyi Li

    (School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao 266237, China)

  • Hanhan Xue

    (School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao 266237, China)

  • Yutong Liu

    (School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao 266237, China)

  • Junpeng Qiao

    (School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao 266237, China)

  • Jingchun Tang

    (Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China)

  • Rutao Liu

    (School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao 266237, China)

  • Qigui Niu

    (School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72# Jimo Binhai Road, Qingdao 266237, China)

Abstract

Polycyclic aromatic hydrocarbons (PAHs) are widely distributed in the sludge environment due to activities such as oil extraction and pose a serious threat to deep-seated anaerobic microorganisms. Thus, in this study, we discussed the dose–response efficiency of naphthalene (Nap, a typical PAH) on anaerobic digestion (AD) through co-metabolic degradation via batch experiments. The batch results showed that 30 mg/L Nap promoted the AD with the accumulation of CH4 18.54% higher than the control (without Nap) by increasing the efficiency of hydrolysis and acetogenesis 99.49% and 61.95%, respectively. However, adverse effects were observed with an excessive dosage of Nap (higher than 100 mg/L) with a decrease of methane production (37.16) with 2000 mg/L Nap. Interestingly, the concentrations of the polysaccharide and protein reached the highest at 138.76 mg/L and 400.41 mg/L, respectively, in 1000 mg/L Nap. Furthermore, the high activities of hydrolase and transmembrane ATPase were acquired in 30 mg/L Nap. In addition, Nap significantly affected the methanogenic microbial abundance and diversity, especially diminishing Methanolinea and Syntrophobacter . Furthermore, the enrichment of Bacteroides in 30 mg/L Nap showed moderate Nap could facilitate hydrolysis. The genes relevant to cellular processes were activated by Nap. This research provided a reliable basis for the anaerobic microbial response under Nap stress.

Suggested Citation

  • Yilin Yao & Jingyi Li & Hanhan Xue & Yutong Liu & Junpeng Qiao & Jingchun Tang & Rutao Liu & Qigui Niu, 2022. "Influences of Naphthalene Concentration on Starch Anaerobic Digestion: Focusing on Digestion Performance, Extracellular Polymeric Substances and Function Microbial Community," Sustainability, MDPI, vol. 14(24), pages 1-15, December.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:24:p:16377-:d:996503
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    References listed on IDEAS

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    1. Mohamed El-Naggar & Said Hanafy & Alaa M. Younis & Mahmoud A. Ghandour & Abdel-Aziz Y. El-Sayed, 2021. "Seasonal and Temporal Influence on Polycyclic Aromatic Hydrocarbons in the Red Sea Coastal Water, Egypt," Sustainability, MDPI, vol. 13(21), pages 1-18, October.
    2. Hongtao Yu & Qingsu Xia & Jian Yan & Diogenes Herreno-Saenz & Yuh-Shen Wu & I-Wah Tang & Peter P. Fu, 2006. "Photoirradiation of Polycyclic Aromatic Hydrocarbons with UVA Light – A Pathway Leading to the Generation of Reactive Oxygen Species, Lipid Peroxidation, and DNA Damage," IJERPH, MDPI, vol. 3(4), pages 1-7, December.
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