Article
Engineering, Environmental
Hong Wang, Xiaohu Dai, Yu Hua, Donghai Yang, Hong Chen
Summary: Low-strength ammonia and temperature pose challenges to the application of the partial nitritation-anammox (PNA) process in treating mainstream wastewater. This study investigated the effects of various substrate concentrations and temperatures on nitrogen removal performance, biochemical reaction rate, and specific activity in a single-stage PNA system. The results showed that low ammonia concentration caused a decline in reaction rate and activity of anammox bacteria, while low temperature resulted in a significant decrease in the relative abundance of anammox bacteria. Changes in metabolic pathways suggest that the PNA system can adapt to low substrate concentrations and temperatures by facilitating substance transport and reducing energy consumption.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Hong Chen, Hong Wang, Rong Chen, Sheng Chang, Yu Yao, Changbo Jiang, Sha Wu, Yanxiao Wei, Guanlong Yu, Min Yang, Yu-You Li
Summary: The study found that a partial nitritation-anammox process can achieve stable and efficient nitrogen removal under certain operating conditions. The quantity of microbial consortia with good granularity in the system has a significant impact, leading to changes in microbial community structure.
BIORESOURCE TECHNOLOGY
(2021)
Review
Agricultural Engineering
Yujie Chen, Guangze Guo, Yu -You Li
Summary: This review introduces the application of anaerobic ammonia oxidation (anammox) process in nitrogen removal and summarizes methods to improve nitrogen removal rate. Recently developed integrated systems aim to enhance nitrogen removal rate and efficiency, providing new insights for achieving efficient nitrogen removal.
BIORESOURCE TECHNOLOGY
(2022)
Article
Genetics & Heredity
Alejandro Palomo, Daniela Azevedo, Maria Touceda-Suarez, Carlos Domingo-Felez, A. Gizem Mutlu, Arnaud Dechesne, Yulin Wang, Tong Zhang, Barth F. Smets
Summary: This study analyzed the microbiome of an efficient autotrophic ammonia removal process and found that sequential feeding and periodic aeration can achieve high efficiency. The microbiome consisted of abundant aerobic and anaerobic ammonia oxidizing bacteria and scarce nitrite oxidizing bacteria. Additionally, there was a mutual dependency in amino acid and vitamin synthesis between autotrophic and heterotrophic community members.
ENVIRONMENTAL MICROBIOME
(2022)
Article
Engineering, Environmental
Enzhe Yang, Jing Chen, Ke Liu, Jianhong Jiang, Hong Wang, Sha Wu, Lixiu Shi, Jingyi Jiang, Eli Hendrik Sanjaya, Hong Chen
Summary: This study constructed a single-stage partial nitritation-anammox and denitrification system and operated it continuously for 364 days. The system showed efficient and stable operation, with an average total nitrogen removal efficiency of 87.2%. The nitrogen removal pathway in the system changed from autotrophic nitrogen removal to nitrification-denitrification. Overall, the system demonstrated the potential for efficient single-stage nitrogen removal.
Review
Environmental Sciences
Songkai Qiu, Zebing Li, Yuansheng Hu, Lin Shi, Rui Liu, Lei Shi, Lujun Chen, Xinmin Zhan
Summary: The partial nitritation-anammox (PN-A) process offers a game-changing alternative for nitrogen removal in municipal wastewater treatment, with potential challenges including process instability, low nitrogen removal efficiency, and poor effluent quality at low temperatures, highlighting the importance of efficient anammox biomass retention for successful implementation.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yunzhi Qian, Yan Guo, Junhao Shen, Yu Qin, Yu-You Li
Summary: This study investigated the growth characteristics and treatment performance of biofilms in a single stage partial nitritation/anammox reactor. Biofilm reactivation was achieved through mechanical stirring treatment. The results demonstrate the potential of using mechanical stirring treatment to reactivate biofilms.
Article
Biotechnology & Applied Microbiology
Kuo Zhang, Xinjue Li, Shou-Qing Ni, Sitong Liu
Summary: The study investigated the impact of different carrier materials on nitritation performance, finding that the Sepiolite nonwoven composite carrier significantly inhibits nitrite-oxidizing bacteria, improving the efficiency of the nitritation process and holding significant importance for mainstream wastewater treatment.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Engineering, Environmental
Zhiyao Wang, Min Zheng, Haoran Duan, Zhiguo Yuan, Shihu Hu
Summary: This study examines the progress of nitrite-oxidizing bacteria (NOB) suppression in both the sidestream and mainstream partial nitritation and anammox (PN/A) processes over the past two decades. It highlights the challenges in achieving stable NOB suppression in mainstream treatment and suggests the potential of a hybrid process and combination of strategies for efficient mainstream PN/A.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Engineering, Environmental
Peng Wu, Junjiang Chen, Vijay Kumar Garlapati, Xingxing Zhang, Francis Wani Victor Jenario, Xiang Li, Wenru Liu, Chongjun Chen, Tejraj M. Aminabhavi, Xiaonong Zhang
Summary: This study presents a comprehensive review of the anammox process, the advancements in nitritation and denitratation processes, and proposes a novel wastewater treatment method for efficient nitrogen removal.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Yan Feng, Bo Wang, Yongzhen Peng, Xiyao Li, Qiong Zhang
Summary: A continuous plug-flow reactor was used to treat municipal wastewater, achieving stable nitrification and denitrification through different zones and conditions. Results showed that the PN-SAED process had high nitrogen removal efficiency and contribution rate, making it a promising method for nitrogen removal.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Yunzhi Qian, Yanmei Ding, Huaji Ma, Yongzhi Chi, Hongying Yuan, Yu-You Li, Sufeng Tian, Bowen Zhang
Summary: A novel internal circulation contact oxidation membrane bioreactor (ICCOMBR) was constructed to investigate a three steps startup strategy of single-stage partial nitritation-anammox (SPNA) system. The SPNA system achieved stable nitrite accumulation rate and high total nitrogen removal efficiencies.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Takanori Awata, Yumiko Goto, Hisashi Kuratsuka, Yoshiteru Aoi, Noriatsu Ozaki, Akiyoshi Ohashi, Tomonori Kindaichi
Summary: Partial nitritation combined with anaerobic ammonium oxidation (PNA) is a promising biological nitrogen-removal process for ammonia-rich wastewater, but its application to low-strength ammonia wastewater remains challenging. This study found that the single-stage PNA processes in two MBRs showed good total nitrogen removal, but competition among anammox bacteria was a concern in both systems.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biotechnology & Applied Microbiology
Jinliang Xu, Qingjie Cui, Cuina Bu, Sherif Ismail, Shou-Qing Ni
Summary: This study evaluated the microbial community of different types of sludge in a full-scale sidestream partial nitrification-anammox plant to understand the separation mechanism of anammox and nitrifiers. Suspended sludge showed higher partial nitrification capacity while biofilm sludge had higher anammox activity. High-throughput results revealed that Nitrosomonas was the main active ammonia-oxidizing bacteria in suspended sludge, and Candidatus Brocadia had the highest abundance in biofilm sludge.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Agricultural Engineering
Ting Huang, Jianqiang Zhao, Bo Hu, Junkai Zhao, Chunbo Yuan
Summary: The addition of hydroxylamine successfully restored the one-stage partial nitritation and anammox process, improving nitrogen removal efficiency and reducing nitrate production ratio.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Hong Wang, Xiaohu Dai, Yu Hua, Donghai Yang, Hong Chen
Summary: Low-strength ammonia and temperature pose challenges to the application of the partial nitritation-anammox (PNA) process in treating mainstream wastewater. This study investigated the effects of various substrate concentrations and temperatures on nitrogen removal performance, biochemical reaction rate, and specific activity in a single-stage PNA system. The results showed that low ammonia concentration caused a decline in reaction rate and activity of anammox bacteria, while low temperature resulted in a significant decrease in the relative abundance of anammox bacteria. Changes in metabolic pathways suggest that the PNA system can adapt to low substrate concentrations and temperatures by facilitating substance transport and reducing energy consumption.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Zhe Kong, Tianwei Hao, Hong Chen, Yi Xue, Dapeng Li, Yang Pan, Yong Li, Yu-You Li, Yong Huang
Summary: This study theoretically compared the feasibility of using anaerobic membrane bioreactor (AnMBR) and conventional activated sludge (CAS) process for treating DMF-containing wastewater. The results showed that AnMBR had advantages in electricity generation, bio-energy recovery, and CO2 emission reduction, making it a promising carbon-neutral treatment process for high-strength DMF-containing wastewater in the future.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Hong Chen, Zhen Luo, Yanxiao Wei, Zhenyu Deng, Enzhe Yang, Hong Wang, Jing Chen, Eli Hendrik Sanjaya, Zhihua Liu, Sha Wu
Summary: In this study, a comprehensive assessment of reactor performance, sludge characteristics, and microbial community characteristics was conducted to investigate the complex inhibitions leading to the deterioration of reactor performance in anaerobic treatment of monosodium glutamate wastewater under low COD/sulfate ratios. The decrease in gas yield was attributed to the complex competition between sulfate-reducing bacteria (SRB) and methane-producing archaea (MPA), resulting in a decreasing number of MPA. The competitive advantage of SRB for electrons led to the production of more sulfides in the reactor, further inhibiting the activity of MPA.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2023)
Review
Environmental Sciences
Linjun Wu, Tao Jin, Hong Chen, Zhiqiang Shen, Yuexi Zhou
Summary: This review addresses the gaps in the understanding of the methanogenesis contribution, characterization techniques, and downstream processes of conductive materials (CMs)-led direct interspecies electron transfer (DIET) in anaerobic digestion (AD). It reveals that the stimulation of methanogenesis cannot be solely attributed to DIET and emphasizes the importance of accurate characterization methods for identifying the interactions involved in syntrophic metabolism. The type of CMs also significantly affects AD downstream processes. Establishing a mathematical model for DIET is identified as a central bottleneck in understanding its mechanism in greater depth.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Ziang He, Yuanyuan Ren, Jianyong Liu, Yu-You Li
Summary: The co-digestion performance of mesophilic hollow fiber anaerobic membrane bioreactor (HF-AnMBR) treating high-solid lipids and food waste was studied for 180 days. The organic loading rate (OLR) was increased from 2.33 to 14.64 g-COD/L/d by increasing the lipids/FW ratio. The HF-AnMBR showed stable performance in terms of COD conversion efficiency, sludge growth rate, and concentrations of COD, proteins, and carbohydrates in permeate.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Min Ye, Qian Li, Yu-You Li
Summary: The study evaluated a high-rate anaerobic membrane bioreactor (AnMBR) for treating dairy processing wastewater (DPW). The AnMBR system exhibited superior performance in terms of methanogenic efficiency and bioenergy recovery, with a high net energy potential of 51.4-53.2 kWh/m3. The application of AnMBR led to a significant reduction of 54.1 kg CO2-eq/m3 compared to the conventional process, making it a promising approach for carbon neutrality and a circular economy.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Yan Guo, Eli Hendrik Sanjaya, Tianjie Wang, Chao Rong, Zibin Luo, Yi Xue, Hong Chen, Yu -You Li
Summary: This study explored the recovery of phosphorus from low-temperature mainstream wastewater through iron phosphate crystallization in a pilot-scale PNA reactor. Under the influent of COD-alleviated municipal wastewater, with an ammonium concentration of about 50 mg/L and a phosphorus concentration ranging from 5.4 to 7.1 mg/L, the achieved nitrogen removal efficiency was 37.6% and the phosphorus removal efficiency was 62.7%. The study proposed a pioneering scheme to realize nitrogen removal and phosphorus cycling in human society and provided a meaningful reference for further research and application.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Sha Wu, Wenyu Zhao, Mengyue Liu, Fei Gao, Hong Chen
Summary: Microbial communities are important components of river ecosystems, involved in the transportation and transformation of pollutants, including nutrients. Understanding microbial community structures is crucial for understanding biochemical circulation in aquatic ecosystems. However, current research focuses more on bacterial diversity and less on eukaryotes, despite their key role in the nutrient cycle.
Article
Agricultural Engineering
Jialing Ni, Jiayuan Ji, Yu-You Li, Kengo Kubota
Summary: An anaerobic membrane bioreactor (AnMBR) was used to treat domestic sewage at 15 degrees C under different hydraulic retention time (HRT) conditions (6, 12, 16, and 24 h). The viability of microbial community in anaerobic digestion was assessed using Propidium monoazide (PMA)-PCR, which targeted microorganisms with intact cell membranes. The study found that a 6-hour HRT resulted in poor treatment performance, with low chemical oxygen demand removal efficiency and high mean trans-membrane pressure and flux. PMA-PCR combined with next-generation sequencing provided better identification of microbial changes compared to conventional 16S rRNA gene sequencing.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Chihao Lin, Yanxu Liu, Yu-You Li, Jianyong Liu
Summary: This study proposes high-salinity treatment as a novel strategy for inactivating nitrite-oxidising bacteria (NOB) and achieving stable partial nitritation (PN). The study found that NOB are more sensitive to high salinity than ammonia-oxidising bacteria (AOB), and increasing salinity inhibited nitrification. After high-salinity treatment, nitrite accumulation rate (NAR) was above 33% during nitrification. A novel process for achieving mainstream PN was proposed and evaluated based on the results.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Yunzhi Qian, Shilong He, Fuqiang Chen, Junhao Shen, Yan Guo, Yu Qin, Yu-You Li
Summary: This study evaluated the functional activity and microbial structure of a pre-denitrification and single-stage partial nitritation/anammox process (DB-SNAP) coupled system for effectively treating swine manure digestate (SMD). The results showed that the pre-denitrification reactor increased the nitrogen removal efficiency (NRE) by 5%, resulting in an average NRE of 96%. The DB-SNAP and nitrogen-limited strategy facilitated the rapid adoption of anammox bacteria (AnAOB) in the SMD.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Mengni Tao, Yu Kong, Zhaoqian Jing, Lin Guan, Qiusheng Jia, Yiwei Shen, Meijia Hu, Yu -You Li
Summary: Acorus calamus is recycled as an additional carbon source in microbial fuel cell-constructed wetlands for efficient nitrogen removal of low carbon wastewater. Alkali-pretreatment cleaves the benzene rings in dominant released organics, producing chemical oxygen demand of 164.5 mg per gram of A. calamus. Adding pretreated biomass in the anode of MFC-CW achieves maximum total nitrogen removal of 97.6% and power generation of 12.5 mW/m2.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Jiayuan Deng, Xiangmin Xiao, Yu-You Li, Jianyong Liu
Summary: This study used the innovative low-carbon nitrogen removal process of partial denitrification-anammox (PD-A) to simultaneously treat PPCCW and municipal wastewater pre-treated with 10 mg/L Fe3+. The results showed that the effluent had a total nitrogen concentration lower than 10 mg/L, with a removal efficiency of 79.67 +/- 3.48%. The dominant anammox genus was unclassified_f_Brocadiaceae, indicating the stability of the reactor. Hydrolytic acidifying bacteria SBR1031 and Bacillus increased substantially after feeding with actual wastewater, leading to increased removal efficiencies of organic material and nitrogen, suggesting a synergistic effect with PD-A bacteria. Finally, a novel wastewater treatment process that fully recovers carbon, phosphorus, and water was proposed.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Hong Wang, Hong Chen, Yongdong Chen, Enzhe Yang, Long Chen, Qiuhong Chen, Donghai Yang, Xiaohu Dai
Summary: In this study, a novel dissolved oxygen-differentiated airlift internal circulation PNA (PNA-DOAIC) system was designed and operated to investigate the effects of organic matter on the PNA process. The results showed that an influent C/N ratio of 2.0 was optimal for efficient and stable operation. The PNA coupled with denitrification achieved high nitrogen removal efficiency, but as the influent C/N ratio increased, the activity and abundance of anammox bacteria declined, and heterotrophic bacteria became dominant. The nitrogen removal pathways shifted from PNA to the nitrification-denitrification process. This study provides important insights into the effects of organic matter on the PNA process and expands the application scope of PNA-DOAIC bioreactors.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Enzhe Yang, Jing Chen, Ke Liu, Jianhong Jiang, Hong Wang, Sha Wu, Lixiu Shi, Jingyi Jiang, Eli Hendrik Sanjaya, Hong Chen
Summary: This study constructed a single-stage partial nitritation-anammox and denitrification system and operated it continuously for 364 days. The system showed efficient and stable operation, with an average total nitrogen removal efficiency of 87.2%. The nitrogen removal pathway in the system changed from autotrophic nitrogen removal to nitrification-denitrification. Overall, the system demonstrated the potential for efficient single-stage nitrogen removal.
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)
