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Advances of Anaerobic Technologies on Wastewater Treatment
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Advances of Anaerobic Technologies on Wastewater Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 9316

Special Issue Editors

Dr. Jixiang Yang

E-Mail Website
Guest Editor
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
Interests: wastewater; model; activated sludge; anaerobic granular sludge; membrane bioreactor; algae; algal-bacteria
Special Issues, Collections and Topics in MDPI journals
Dr. Jialing Tang

E-Mail Website
Guest Editor
School of Architecture and Civil Engineering, Chengdu university, Chengdu 610106, China
Interests: anaerobic digestion; wasterwater treatment; membrane bioreactor (MBR); nutrient recycling; waste management
Special Issues, Collections and Topics in MDPI journals
Dr. Linji Xu

E-Mail Website
Guest Editor
Faculty of Environment and Ecology, Chongqing University, Chongqing 400044, China
Interests: anaerobic digestion; sustainable energy recovery; desalination

Special Issue Information

Dear Colleagues,

Conventional sewage treatment applying activated sludge processes is energy-intensive and requires great financial input, hampering widespread implementation. Scientists have worked hard to reduce the energy requirement. Despite the achieved advancements, stoichiometries of current bioprocesses determine that oxygen is always required and energy requirement originating from oxygen supply remains a condition for sewage treatment. Therefore, developing oxygen-free technologies would solve the high energy demand of current sewage treatment bioprocesses.

Anaerobic digestion can convert energy embedded in organic matter to the form that human can utilize and thereby is a promising technology for wastewater treatment. Although it is an ancient technology, it gradually attracts much more attention than ever before. Many questions should be answered by implementing anaerobic technologies such as: whether Anaerobic digestion can be helpful in greenhouse gas emission and results in a better resource recovery?

This special issue will try to summarize the most important advances in wastewater treatment by anaerobic approaches.

Dr. Jixiang Yang
Dr. Jialing Tang
Dr. Linji Xu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • anaerobic MBR, research & application
  • bio-electrochemical systems / microbial fuel cells
  • nutrient reuse
  • carbon-neutral
  • energy balance
  • granular sludge bed technologies
  • modeling, instrumentation, and control

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Published Papers (3 papers)

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Research

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15 pages, 1678 KiB  
Article
Pollutant Removal and Energy Recovery from Swine Wastewater Using Anaerobic Membrane Bioreactor: A Comparative Study with Up-Flow Anaerobic Sludge Blanket
by Yunhui Pu, Jialing Tang, Ting Zeng, Yisong Hu, Jixiang Yang, Xiaochang Wang, Jin Huang and Abdelfatah Abomohra
Water 2022, 14(15), 2438; https://doi.org/10.3390/w14152438 - 6 Aug 2022
Cited by 13 | Viewed by 2684
Abstract
Due to its high content of organics and nutrients, swine wastewater has become one of the main environment pollution sources. Exploring high-efficient technologies for swine wastewater treatment is urgent and becoming a hot topic in the recent years. The present study introduces anaerobic [...] Read more.
Due to its high content of organics and nutrients, swine wastewater has become one of the main environment pollution sources. Exploring high-efficient technologies for swine wastewater treatment is urgent and becoming a hot topic in the recent years. The present study introduces anaerobic membrane bioreactor (AnMBR) for efficient treatment of swine wastewater, compared with up-flow anaerobic sludge blanket (UASB) as a traditional system. Pollutant removal performance, methanogenic properties, and microbial community structures were investigated in both reactors. Results showed that by intercepting particulate organics, AnMBR achieved stable and much higher chemical oxygen demand (COD) removal rate (approximately 90%) than UASB (around 60%). Due to higher methanogenic activity of anaerobic sludge, methane yield of AnMBR (0.23 L/g-COD) was higher than that of UASB. Microbial community structure analysis showed enrichment of functional bacteria that can remove refractory organic matter in the AnMBR, which promoted the organics conversion processes. In addition, obvious accumulation of acetotrophic and hydrotrophic methanogens in AnMBR system was recorded, which could broaden the organic matter degradation pathways and the methanogenesis processes, ensuring a higher methane yield. Through energy balance analysis, results concluded that the net energy recovery efficiency of AnMBR was higher than that of UASB system, indicating that applying AnMBR for livestock wastewater treatment could not only efficiently remove pollutants, but also significantly enhance the energy recovery. Full article
(This article belongs to the Special Issue Advances of Anaerobic Technologies on Wastewater Treatment)
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17 pages, 1814 KiB  
Article
Study of the Behavior of Alkalinities Predicted by the AM2 Model
by Armando Campos-Rodríguez, Marco A. Zárate-Navarro, Efrén Aguilar-Garnica, Víctor Alcaraz-González and Juan Paulo García-Sandoval
Water 2022, 14(10), 1634; https://doi.org/10.3390/w14101634 - 19 May 2022
Cited by 2 | Viewed by 1708
Abstract
Anaerobic digestion (AD) is an efficient wastewater bioprocess, suitable for treating agroindustrial residues with high organic loads and characterized by both a low environmental impact and energy generation. This process is conformed by several chemical and biological reactions in an oxygen free atmosphere, [...] Read more.
Anaerobic digestion (AD) is an efficient wastewater bioprocess, suitable for treating agroindustrial residues with high organic loads and characterized by both a low environmental impact and energy generation. This process is conformed by several chemical and biological reactions in an oxygen free atmosphere, that degrades high molecular weight organic compounds into carbon dioxide and methane mainly but also into traces of hydrogen and ammonia. This process is potentially unstable to volatile fatty acids (VFA), and the alkalinity. variations and is satisfactorily described by the non-linear AM2 model. In this contribution, the AM2 model is modified to include a more general expression for the pH, a cheap and continuous measurement, and also to add more detail in the interactions of the VFA, bicarbonates, and the alkalinity, key factors in the process stability. The stability of the AM2 modified model is explored through a rigorous bifurcation analysis that identifies unstable operation zones and viability of operation trajectories as a function of the dilution rate. Finally, an experimental validation is carried out to show the feasibility and accuracy of the proposed modifications. Full article
(This article belongs to the Special Issue Advances of Anaerobic Technologies on Wastewater Treatment)
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Review

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19 pages, 1602 KiB  
Review
Hypersaline Wastewater Produced from Pickled Mustard Tuber (Chinese Zhacai): Current Treatment Status and Prospects
by Linji Xu, Yunsong Pang, Wenzong Liu, Hongna Chen, Shunjun Huang and Lei Zhu
Water 2022, 14(9), 1508; https://doi.org/10.3390/w14091508 - 8 May 2022
Cited by 12 | Viewed by 3326
Abstract
Pickled mustard tuber, a worldwide condiment, is increasing at a fast growth rate. Its production generates a considerable amount of hypersaline wastewater containing NaCl of 7 wt.%, COD of 30,000 mg L−1, NH3-N of 400 mg L−1, [...] Read more.
Pickled mustard tuber, a worldwide condiment, is increasing at a fast growth rate. Its production generates a considerable amount of hypersaline wastewater containing NaCl of 7 wt.%, COD of 30,000 mg L−1, NH3-N of 400 mg L−1, and TP of 300 mg L−1. Pickled mustard tuber wastewater (PMTW) has severe effects on crops, deterioration of water quality, soil infertility and ecological systems. Due to the technic difficulties and insufficient support from the local governments; however, PMTW has not yet been widely investigated and well summarized. Therefore, this manuscript reviewed the relatively latest advances in PMTW. Physicochemical and biological hybrid processes mainly treat PMTW and the corresponding cost is 6.00 US dollars per ton. In the context of double carbon capture capacity in China and the development of the pickled mustard industry, PMTW sauce and sustainable reuse such as nutrient recovery, acid and alkaline regeneration and renewable energy may be bright prospects. Full article
(This article belongs to the Special Issue Advances of Anaerobic Technologies on Wastewater Treatment)
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