Article
Environmental Sciences
Jiamin Zhao, Tingting Hou, Zhongfang Lei, Kazuya Shimizu, Zhenya Zhang
Summary: A biogas recirculation-driven anaerobic digestion system was developed in this study, coupled with an alkali addition strategy, which not only improved biogas upgrading efficiency but also enhanced sludge settleability and dewaterability, reducing sludge management costs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Yasmine Ryma Ouahabi, Kenza Bensadok, Abdeldjalil Ouahabi
Summary: This study demonstrates that using ultrasonic processing on wheat straw can improve methane yield, and optimal results can be achieved under certain conditions.
Article
Environmental Sciences
Sivaraman Chandrasekaran, J. Rajesh Banu, Gopalakrishnan Kumar
Summary: The study aimed to improve the hydrolysis potential of paper mill sludge by a two-phase disintegration process. The removal of extracellular polymeric substance (EPS) was focused on, in order to enhance the efficiency of subsequent disperser disintegration. The efficiency of disintegration was evaluated using soluble chemical oxygen demand (SCOD) and suspended solids (SS) reduction as assessment indices. Deflocculation of sludge at a calcium peroxide dosage of 0.05 g/g suspended solids (SS) and a temperature of 70 degrees C resulted in greater EPS removal. A clear variation was observed between deflocculated and disintegrated sludge (19.2%) compared to disintegrated sludge alone (13.5%), indicating the necessity of deflocculation before disintegration. Additionally, deflocculated and disintegrated sludge achieved higher biomethane production of 0.214 L/g COD than pretreated sludge alone. The efficiency of the proposed disintegration reduced the sludge management cost from 170 USD (Disperser alone (D alone disintegration)) to 51 USD (Thermal calcium peroxide mediated-Disperser (TCaO2-D disintegration)).
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Alicja Machnicka, Klaudiusz Grubel
Summary: The aim of this research was to explore the application of waste activated sludge (WAS) pretreatment processes in anaerobic digestion. The results showed significant reductions in pathogenic bacteria, coliphages, and parasite eggs using hydrodynamic disintegration and freezing/thawing disintegration methods. The hybrid disintegration method achieved the best results.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Katarzyna Pazdzior, Marlena Dominska, Magdalena Olak-Kucharczyk
Summary: Ozonation treatment can enhance biogas production from surplus activated sludge by increasing production efficiency and methane content. The elemental composition and chemical structure of sludge were not affected by ozonation, but hydrolysis of organic compounds from sludge contributed to the improvement of biogas production.
Article
Environmental Sciences
Monika Zubrowska-Sudol, Justyna Walczak, Agnieszka Garlicka, Katarzyna Sytek-Szmeichel, Katarzyna Umiejewska
Summary: The study confirmed the applicability of sewage sludge disintegration efficiency determination method to assessing agro-waste disintegration, recommending the use of organic compound release efficiency for evaluation.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Engineering, Environmental
Li Sha, Zhangxiang Wu, Zichen Ling, Xingxin Liu, Xiaoyan Yu, Shuting Zhang
Summary: The differences in moisture distribution, physicochemical characteristics, and EPS properties of activated sludge between the anode and the cathode increase during the EDW process. The study investigated the dewatering efficiency and EC of ESA and ESC during EDW, revealing that ESC had the lowest EC value at the terminal stage. ESC was difficult to be dewatered at 60% AMC due to higher protein content in EPS, providing guidance for low EC operation of the EDW process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Jiamin Zhao, Tingting Hou, Qian Wang, Zhenya Zhang, Zhongfang Lei, Kazuya Shimizu, Wenshan Guo, Huu Hao Ngo
Summary: The study found that biogas recirculation can increase the CH4 production rate, reduce the lag-phase duration, and enhance the CH4 content; the system also improves the dewaterability of digested sludge and induces microbial self-aggregation; energy balance analysis demonstrates an increase in net energy recovery for the system.
Article
Environmental Sciences
Xin Zhang, Hongtao Zhang, Zhenchang Wang, Tao Liu, Daliang Guo, Zhijun Hu
Summary: In this study, the combination of oxalic acid (OA) and Fe2+-persulfate (PDS) was used to improve the dewatering efficiency of paper sludge. The OA/Fe2+-PDS process effectively reduced the viscosity of sludge suspension and supernatant, increased the content of extracellular polymeric substances fractions, and improved the stability of heavy metals. These findings provide a novel approach for sludge dewatering in the PDS oxidation process.
Article
Environmental Sciences
Junsen Wang, Tianrun Wang, Zonglin Li, Bomin Fu, Yuhui Zhai, Weijie Wang, Mudi Zhai, Jean-Marc Chovelon, Yuxiu Gong, Hongtao Wang
Summary: In this study, an advanced oxidation process using electrolysis coupled with peroxymonosulfate (E/PMS) was used to improve the dewaterability of waste activated sludge (WAS). The results showed that the E/PMS process significantly reduced the water content and capillary suction time of the sludge, indicating improved dewaterability. The generation of reactive oxygen species in the process damaged the extracellular polymeric substances (EPS) and reduced the viscosity of the sludge, leading to a decrease in sludge volume and improved disposal efficiency. Additionally, the E/PMS treatment also enhanced the degradation of organic matter and reduced the toxicity and bioavailability of heavy metals in the sludge.
Article
Environmental Sciences
Asaad Olabi, Sayiter Yildiz
Summary: The study demonstrated that the combination of ultrasonic process with UV light in Fenton processes plays a crucial role in disintegration of waste sludge, especially in modified Fenton process. Under optimal conditions, the addition of ultrasound significantly improved the degree of disintegration and reduced toxicity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Iwona Zawieja, Malgorzata Worwag
Summary: This study investigated the impact of chemical disintegration with peracetic acid on biogas production efficiency using methane fermentation of pretreated sludge. The results showed that this method can increase sludge digestion degree and biogas production efficiency.
Article
Energy & Fuels
Monika Zubrowska-Sudol, Katarzyna Sytek-Szmeichel, Piotr Krawczyk, Agnieszka Bisak
Summary: This study evaluated the impact of mechanical disintegration of waste activated sludge on anaerobic digestion, and found that increasing the energy density used in disintegration resulted in higher release of organic compounds. The percentage of sludge subjected to disintegration was also identified as a crucial factor affecting biogas production efficiency.
Article
Agronomy
Binhao Liu, Shengxiao Wang, Pengcheng Dong, Xinzhe Zhang, Long Zhang, Chen Chen, Xihui Xu, Yan Xia, Zhenguo Shen, Liang Shi, Yahua Chen
Summary: The fate of copper (Cu) in saline-alkali soil (SAS) during the application of biogas residue (BR) with a high Cu concentration was investigated using various techniques. The main adsorption groups for Cu in SAS and BR were identified as carboxyl, hydroxyl, amide, and amine. Cu adsorption by carboxyl group was driven by entropy-enthalpy co-driving, while Cu adsorption by amine group was entropy-driven. Cu adsorption on SAS and BR was mainly facilitated by organic matter rather than minerals. The degradation of BR in SAS led to an increase in Cu adsorption groups, resulting in Cu being adsorbed onto the surface or inside SAS through organic groups. This study provides theoretical support for the application of BR in SAS.
Article
Plant Sciences
Marcin Debowski, Joanna Kazimierowicz, Izabela Swica, Marcin Zielinski
Summary: This study evaluated the effect of ultrasonic disintegration on the performance and energy efficiency of anaerobic digestion of Scenedesmus sp. and Pinnularia sp. microalgal biomass. The pretreatment significantly increased dissolved COD and TOC in the system. The highest CH4 yields were achieved for Scenedesmus sp. sonicated for 150 s and 200 s, while Pinnularia sp. exhibited poorer performance compared to non-pretreated biomass.
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)