Zero valent iron enhances methane production from primary sludge in anaerobic digestion

Wei, Wei; Fu, Jie; Xie, Guo-Jun; Li, Ang; Zhou, Xu; Ni, Bing‐Jie; Wang, Dongbo; Wang, Qilin

doi:10.1016/j.cej.2018.06.160

Cited by 91 publications

(26 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous study also reported that TC could be degraded by 70% during polit-scale composting experiment [30]. Although Cetecioglu et al found a biodegradation rate of 46% for TC under methanogenic condition [13], Cetecioglu et al [20] also showed the major fraction (> 80 %) of the TC introduced into the anaerobic reactor could be fully or partially biodegraded along with the organic substrate. The high removal rates of TC in studied anaerobic reactors could be resulted from the granular sludge which owned higher tolerance to TC than disrupted sludge [16].…”

Section: The Methane Production Kinetics and Tc Removal 272mentioning

confidence: 98%

“…Therefore, 74 new technology on the basis of anaerobic biological method was required to resolve 75 this drawback. 76 6 ZVI can act as reducing agent which helps create an enhanced anaerobic environment to improve the performance of anaerobic process and maintain a stable and favorable condition for methanogenic archaea [12,13]. In addition, the nZVI addition presented 81 many advantages such as acting as electron donor, increase the total consumption of 82 hydrogen methanogens and activity, release Fe 2+ into the anaerobic system and participating in the synthesis of the key enzymes, provide for iron element serving as trace element for methanogens [12], optimizing the structure of microbial population, changing the hydrolysis fermentation types and promoting the acetic acid content [12,14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of nano zero valent iron on tetracycline degradation and microbial community succession during anaerobic digestion

Pan

et al. 2019

Chemical Engineering Journal

View full text Add to dashboard Cite

Supplementing nano zero valent iron (nZVI) is an attractive technology for wastewater treatment due to its advantages in accelerating the hydrolysis, fermentation and anaerobic digestion (AD) process. In this present study, nZVI was added to investigate its effects on enhancing tetracycline (TC) wastewater anaerobic treatment and the changes of microbial community, especially for underestimated syntrophic-methanogenic associations. The TC concentrations were 1, 10, 30, 50, 80, 100 and 150 mg/L with 0.38g nZVI (with iron g/g VS of 0.50) complemented into reactors. Results revealed that nZVI could enhance AD process in both control and TC dosed systems, and the promoting effect on methanogenesis was more significant in systems of high concentration TC, with 100 and 150 mg/L. In addition, cumulative CH4 production for all TC added systems without nZVI were higher than the control indicating TC had positive effect instead of expected negative effect on AD process, high TC concentration of 100 and 150 mg/L only affecting the increase factor rather than causing inhibitory effect. After digestion, TC was largely removed in with/without nZVI systems. And also, nZVI evidently altered the bacterial and methanogenic community structure, with an increase abundance of syntrophic-methanogenic associations (Syntrophobacterales and Methanosarcinales) 33 and resulting in the enhancement of methane generation. This research provides an efficient method for TC wastewater anaerobic treatment.

show abstract

Section: The Methane Production Kinetics and Tc Removal 272mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Impact of nano zero valent iron on tetracycline degradation and microbial community succession during anaerobic digestion

Pan

et al. 2019

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

“…Zero-valent iron can provide electrons for microorganisms, and it has a high reduction activity that can maintain a low redox potential in the anaerobic environment ( Völker et al, 2017 ) and significantly increase the anaerobic biodegradation of chlorpyrifos to reduce water poisoning ( Shi et al, 2019a ). Adding zero-valent iron can also increase anaerobic digestion in STPs as well as methane production ( Wei et al, 2018 ). Fe can also significantly alter the bacterial and methanogenic community structure ( Pan et al, 2019 ), is also an important protein cofactor ( Kleemann and Meckenstock, 2011 ), and is essential for most organisms ( Beauchene et al, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

“…Iron is also a major protein cofactor that is essential for most organisms and increases the production of degrading enzymes ( Beauchene et al, 2015 ). Because of its advantages in accelerated hydrolysis, fermentation, and anaerobic digestion, zero-valent iron increases the abundance of methanogens and promotes methane production ( Wei et al, 2018 ; Pan et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Aerobic and Anaerobic Biodegradability of Organophosphates in Activated Sludge Derived From Kitchen Garbage Biomass and Agricultural Residues

Yang

Fan

et al. 2021

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

Organophosphates (also known as organophosphate esters, OPEs) have in recent years been found to be significant pollutants in both aerobic and anaerobic activated sludge. Food waste, such as kitchen garbage and agricultural residues, can be used as co-substrates to treat the active sludge in sewage treatment plants (STPs). We investigated the biodegradability of nine OPEs derived from kitchen garbage biomass and agricultural residues under different conditions. Under anaerobic conditions, the rate of removal of triphenyl ester OPEs was significantly higher than that of chloride and alkyl OPEs. The addition of FeCl3 and Fe powder increased the rate of degradation of triphenyl ester OPEs, with a DT50 for triphenyl ester OPEs of 1.7–3.8 d for FeCl3 and 1.3–4.7 d for Fe powder, compared to a DT50 of 4.3–6.9 d for the blank control. Addition of an electron donor and a rhamnolipid increased the rate of removal of chlorinated OPEs, with DT50 values for tris(2-carboxyethyl)phosphine) (TCEP) and tris(1,3-dichloroisopropyl)phosphate (TDCPP) of 18.4 and 10.0 d, respectively, following addition of the electron donor, and 13.7 and 3.0 d, respectively, following addition of the rhamnolipid. However, addition of an electron donor, electron acceptor, surfactant, and Fe powder did not always increase the degradation of different kinds of OPEs, which was closely related to the structure of the OPEs. No treatment increased the removal of alkyl OPEs due to their low anaerobic degradability. Tween 80, a non-ionic surfactant, inhibited anaerobic degradation to some degree for all OPEs. Under aerobic conditions, alkyl OPEs were more easily degraded, chlorinated OPEs needed a long adaptation period to degrade and finally attain a 90% removal rate, while the rates of degradation of triphenyl ester OPEs were significantly affected by the concentration of sludge. Higher sludge concentrations help microorganisms to adapt and remove OPEs. This study provides new insights into methods for eliminating emerging pollutants using activated sludge cultured with kitchen garbage biomass and agricultural residues.

show abstract

“…Additionally, hydrogen evolution from iron corrosion could enhance both hydrogentrophic methanogenesis and homoacetogenesis resulting from the increased H 2 flux as intermediary electron carrier [22][23][24], making the microbial consortia more susceptible for DIET. Other researchers observed that the addition of NZVIs leads to an increased conversion of complex organics to volatile fatty acids (VFAs) (i.e., improved hydrolysis and acidogenesis), which, in turn, enhanced the overall methanogenesis of complex substrates [25]. Yu et al [26] studied the impact of NZVIs on the anaerobic digestion of WAS and found that the addition of 10 g/L NZVIs improved the hydrolysis-acidification process in which methanogenesis was completely inhibited.…”

Section: Introductionmentioning

confidence: 99%

Impact of Nanoscale Magnetite and Zero Valent Iron on the Batch-Wise Anaerobic Co-Digestion of Food Waste and Waste-Activated Sludge

Kassab

Khater

Odeh

et al. 2020

Water

View full text Add to dashboard Cite

As a potential approach for enhanced energy generation from anaerobic digestion, iron-based conductive nanoparticles have been proposed to enhance the methane production yield and rate. In this study, the impact of two different types of iron nanoparticles, namely the nano-zero-valent-iron particles (NZVIs) and magnetite (Fe3O4) nanoparticles (NPs) was investigated, using batch test under mesophilic conditions (35 °C). Magnetite NPs have been applied in doses of 25, 50 and 80 mg/L, corresponding to 13.1, 26.2 and 41.9 mg magnetite NPs/gTS of substrate, respectively. The results reveal that supplementing anaerobic batches with magnetite NPs at a dose of 25 mg/L induces an insignificant effect on hydrolysis and methane production. However, incubation with 50 and 80 mg/L magnetite NPs have instigated comparable positive impact with hydrolysis percentages reaching approximately 95% compared to 63% attained in control batches, in addition to a 50% enhancement in methane production yield. A biodegradability percentage of 94% was achieved with magnetite NP doses of 50 and 80 mg/L, compared to only 62.7% obtained with control incubation. NZVIs were applied in doses of 20, 40 and 60 mg/L, corresponding to 10.8, 21.5 and 32.2 mg NZVIs/gTS of substrate, respectively. The results have shown that supplementing anaerobic batches with NZVIs revealed insignificant impact, most probably due to the agglomeration of NZVI particles and consequently the reduction in available surface area, making the applied doses insufficient for measurable effect.

show abstract

Zero valent iron enhances methane production from primary sludge in anaerobic digestion

Cited by 91 publications

References 31 publications

Impact of nano zero valent iron on tetracycline degradation and microbial community succession during anaerobic digestion

Impact of nano zero valent iron on tetracycline degradation and microbial community succession during anaerobic digestion

Aerobic and Anaerobic Biodegradability of Organophosphates in Activated Sludge Derived From Kitchen Garbage Biomass and Agricultural Residues

Impact of Nanoscale Magnetite and Zero Valent Iron on the Batch-Wise Anaerobic Co-Digestion of Food Waste and Waste-Activated Sludge

Contact Info

Product

Resources

About