Evidence map›Paper›PMID 40000663›Full record

ArticleScientific reports2025

Enhanced methane production from bloom algal biomass using hydrothermal and hydrothermal-alkaline pretreatment with anaerobic digestion.

Zaixing Huang, Jingzhuo Zhou, Yuxiang Zhong, Yajie Chang, Wanrong Yin, Shuzhong Zhao, Yi Yan, Weiting Zhang, Qingfeng Gu, Huan He and 8 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

18 authors.

Zaixing HuangKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China. zhuang@uwyo.edu.
Jingzhuo ZhouKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China.
Yuxiang ZhongKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China.
Yajie ChangKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China.
Wanrong YinKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China.
Shuzhong ZhaoKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China.
Yi YanKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China.
Weiting ZhangKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China.
Qingfeng GuKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China.
Huan HeKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China. hehuan6819@cumt.edu.cn.
Michael UrynowiczDepartment of Civil and Architectural Engineering and Construction Management, University of Wyoming, Laramie, WY, 82071, USA.
Muhammad Adnan SabarDepartment of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
Gordana MedunićDepartment of Geology, Faculty of Science, University of Zagreb, Horvatovac 95, Zagreb, 10000, Croatia.
Fang-Jing LiuKey Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China.
Hongguang GuoCollege of Safety and Emergency Management and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
Asif JamalDepartment of Microbiology, Quaid-i-Azam University, Islamabad, 44000, Pakistan.
Muhammad Ishtiaq AliDepartment of Microbiology, Quaid-i-Azam University, Islamabad, 44000, Pakistan.
Rizwan HaiderInstitute of Energy & Environmental Engineering, University of the Punjab, Lahore, 54590, Pakistan.

Funding

Fundamental Research Funds for the Central Universities 2021ZDPY0210Key Research Development Program of in Modern Agriculture KC21137National Key Research and Development Program of China 2019YFC1805400National Key Research and Development Program of China 2021YFC2902603National Natural Science Foundation of China 42172187
6 · The paper itself

Abstract

Coalbeds have the potential as geobioreactors for producing renewable natural gas from biomass derived from photosynthesis. This brings about a number of benefits, including support for sustainable energy and the sequestration of carbon dioxide in coal. In this study, freshwater bloom algae were employed as the substrate to examine the influence of hydrothermal and hydrothermal-alkaline pretreatment on methane production using an inoculum from an anaerobic digester. The morphology and chemical structures of the biomass, as well as the volatile fatty acids (VFAs) in the liquid fraction of the post-treatment and gas production, were analyzed to understand their relationship with the efficacy of methane yields and changes in microorganisms. The results revealed that both hydrothermal and hydrothermal-alkaline pretreatment, under the right conditions, can lead to an increase in methane production. Particularly, a pretreatment condition of 0.2 mol/L NaOH at 150 °C for 30 min resulted in a significant increase in methane yield by up to 303.9%. The addition of NaOH facilitated the hydrothermal-alkaline pretreatment, effectively destroying the cell structure of the bloom algae, promoting the dissolution of intracellular sugars and other substances, and reducing the loss of VFAs caused by heating. Moreover, hydrothermal-alkaline pretreatment was found to support the growth of acetoclastic methanogens and enhance methane production by mitigating pH drops. Overall, the results of this study suggest that hydrothermal-alkaline pretreatment offers significant advantages in methane production compared to hydrothermal pretreatment. These findings have important implications for harnessing bloom algae as a viable source for generating renewable natural gas.

Indexed as

BiomassMethaneAnaerobiosisBioreactorsFatty Acids, VolatileSodium HydroxideFatty Acids, VolatileMethaneSodium HydroxideAnaerobic digestionBloom algaeHydrothermal-alkaline pretreatmentHydrothermal pretreatmentMethaneRenewable natural gas

Identifiers

PMID40000663
PMCPMC11861253

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.