Progress of Anaerobic Digestion in Sewage Sludge Treatment

A special issue of Fermentation (ISSN 2311-5637). This special issue belongs to the section "Industrial Fermentation".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 3797

Special Issue Editor

Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
Interests: wastewater treatment; anaerobic digestion; biodegradation; bioremediation; environmental bioelectrochemistry

Special Issue Information

Dear Colleagues,

Anaerobic Digestion (AD) is generally considered an environmentally friendly technology for its low energy input, sludge reduction, and the recovery of renewable energy. Various types of wastewater, pollutants and potential solid wastes are treated with AD. So far, the efficiency of AD for high-strength wastewater or fluctuating environmental conditions is not guaranteed. Determining how to enhance the energy-neutral or output energy sustainable paradigms still requires much investigation. Moreover, how to overcome the limitation of a low carbon source during operation is also a problem which should be suitable for energy recovery and greenhouse gas emission requirements. In this Special Issue, we kindly invite you to submit original research and review articles related to the above areas. The sludge system can be from different original sources, containing different pollutants and operated at various conditions. Related model predictions and mechanisms are also welcome.

Dr. Hui Yun
Guest Editor

Manuscript Submission Information

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Keywords

  • antibiotics 
  • ARGs 
  • emerging micro-pollutants
  • transformation pathways
  • degradation and/or transformation 
  • mechanism

Published Papers (3 papers)

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Research

18 pages, 4129 KiB  
Article
Assessment of Remediation of Municipal Wastewater Using Activated Carbon Produced from Sewage Sludge
by Khuthadzo Mudzanani, Sunny Iyuke and Michael O. Daramola
Fermentation 2023, 9(8), 769; https://doi.org/10.3390/fermentation9080769 - 18 Aug 2023
Viewed by 911
Abstract
This study evaluates the potential to synthesize an adsorbent for wastewater remediation applications from an anaerobic digestion by-product synthesized using biomaterials and a less energy-intensive process. The synthesized sludge-based granular activated carbon (GAC) was used to adsorb Cr(VI) and Cd(II) in a batch [...] Read more.
This study evaluates the potential to synthesize an adsorbent for wastewater remediation applications from an anaerobic digestion by-product synthesized using biomaterials and a less energy-intensive process. The synthesized sludge-based granular activated carbon (GAC) was used to adsorb Cr(VI) and Cd(II) in a batch reactor stirred for 24 h at 25 °C. The surface chemistry of the material was assessed porosity with BET, SEM for morphology, EDS-XRF for elemental analysis, and functional groups on these materials using FTIR and TGA for thermal profile. SBET of the SAC was discovered to be 481.370 m2/g with a VT of 0.337 cm3/g, respectively 9.02 and 2.23 times greater than raw sludge. The modification to SAC shows a dramatic increase in performance from 40% to 98.9% equilibrium adsorption rate. The maximum or equilibrium removal (99.99%) of Cr(VI) and Cd(II) was achieved by 0.8 and 1.4 g SAC dosage, respectively. Thus, it can be concluded that activation of sewage sludge was effective in enhancing the surface area and pore volume which made it suitable for AMD remediation application. Full article
(This article belongs to the Special Issue Progress of Anaerobic Digestion in Sewage Sludge Treatment)
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12 pages, 1216 KiB  
Article
Inhibitory Effects of Ammonia on Archaeal 16S rRNA Transcripts in Thermophilic Anaerobic Digester Sludge
by Shenghui Wang, Caihong Song, Jie Li, Chen Zhang and Peng Li
Fermentation 2023, 9(8), 728; https://doi.org/10.3390/fermentation9080728 - 04 Aug 2023
Viewed by 763
Abstract
High temperatures exacerbate the ammonia inhibition of anaerobic digestion coupled with methanogenesis. The inhibition of methane production by ammonia has been observed in other studies. However, the underlying mechanism is not well understood and requires further investigation. This study explored the effect of [...] Read more.
High temperatures exacerbate the ammonia inhibition of anaerobic digestion coupled with methanogenesis. The inhibition of methane production by ammonia has been observed in other studies. However, the underlying mechanism is not well understood and requires further investigation. This study explored the effect of ammonia stress on archaeal 16S rRNA transcripts in thermophilic anaerobic digester sludge. Different ammonium concentrations were checked for their influence on the methanogenic rate and hydrogen accumulation. Quantitative PCR was used to compare the changes in total archaeal 16S rRNA expression. A Monte Carlo permutation test within redundancy analysis (RDA) was adopted for exploring the relationship between environmental variables and archaeal 16S rRNA and their transcripts. The results showed that with the increase in ammonium concentration, the methanogenic rate decreased and hydrogen accumulation occurred. The total archaeal 16S rRNA genes and transcripts copy numbers decreased significantly in treatments with higher ammonium concentrations (7 and 10 g NH4+-N/L), but did not change much at lower ammonia concentrations (3 g NH4+-N/L) compared with the 0 g NH4+-N/L treatment. The RDA analysis further revealed that most environmental variables, including ammonia and methane, except for formate, were significantly correlated with the community structure activity of archaeal 16S rRNA transcripts rather than the community structure of their genes. The composition of archaeal 16S rRNA transcripts showed that the hydrogenotrophic methanogen Methanothermobacter dominated the methanogenic community activity in all incubations. It exhibited sensitivity to ammonia stress and should be responsible for the methanogenic inhibition under thermophilic conditions. Our findings suggested that archaeal 16S rRNA transcripts, rather than 16S rRNA genes, are key indicators of ammonia stress and methanogenic activity. Full article
(This article belongs to the Special Issue Progress of Anaerobic Digestion in Sewage Sludge Treatment)
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13 pages, 1680 KiB  
Article
Bio-Succinic Acid Production from Palm Oil Mill Effluent Using Enterococcus gallinarum with Sequential Purification of Biogas
by Pooja Vilas Nagime, Apichat Upaichit, Benjamas Cheirsilp and Piyarat Boonsawang
Fermentation 2023, 9(4), 369; https://doi.org/10.3390/fermentation9040369 - 12 Apr 2023
Viewed by 1533
Abstract
Bio-succinic acid production using microorganisms has been interesting as an environmentally friendly process. Palm oil mill effluent (POME) was considered as a cheap substrate to lower the cost of production. It was revealed that 2-fold diluted POME produced more succinic acid than undiluted [...] Read more.
Bio-succinic acid production using microorganisms has been interesting as an environmentally friendly process. Palm oil mill effluent (POME) was considered as a cheap substrate to lower the cost of production. It was revealed that 2-fold diluted POME produced more succinic acid than undiluted and 5-fold diluted POME. In addition, the effects of various neutralizing agents on succinic acid production utilized to manage pH and CO2 supply indicated that the utilization of MgCO3 as a neutralizing agent produced succinic acid of 11.5 g/L with a small amount of by-product synthesis. Plackett–Burman Design (PBD) was used to screen the most significant nutrients for bio-succinic acid production from 2-fold diluted POME using E. gallinarum. From the Pareto chart, MgCO3 and peptone presented the highest positive effect on the production of succinic acid. In addition, Box–Behnken Design (BBD) was conducted to increase bio-succinic acid production. Experiments showed the highest production of succinic acid of 23.7 g/L with the addition of 22.5 g/L MgCO3 and 12.0 g/L peptone in 2-fold diluted POME. Moreover, the experiment of replacing MgCO3 with CO2 from biogas resulted in 19.1 g/L of succinic acid, simultaneously creating the high purity of biogas and a higher CH4 content. Full article
(This article belongs to the Special Issue Progress of Anaerobic Digestion in Sewage Sludge Treatment)
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