Article
Engineering, Environmental
Yi Xue, Haiyuan Ma, Zhe Kong, Yu-You Li
Summary: The study investigated the role of EPS and HAP core in Ca and P removal in anammox-HAP granules, showing that the addition of granule crystal seeds can accelerate the anammox process and enhance overall treatment efficiency.
Article
Engineering, Environmental
Yi Xue, Haiyuan Ma, Yisong Hu, Zhe Kong, Yu-You Li
Summary: This study determined the microstructure, chemical composition, and microbial structure of different-sized anammox-HAP coupled granules, showing homogeneous characteristics regardless of size. A granulation cycle mechanism was proposed for the first time, where small granules grow and enlarge to form large granules, which regenerate new small granules through a two-step procedure.
Article
Engineering, Environmental
Yujie Chen, Yan Guo, Gaoxuefeng Feng, Kampachiro Urasaki, Guangze Guo, Yu Qin, Kengo Kubota, Yu-You Li
Summary: The combination of Anammox and hydroxyapatite (HAP) granules has advantages in nitrogen and phosphorus removal and sludge settleability. This study explores the key factors for stable and efficient nitrogen removal in a one-stage partial nitritation/anammox (PNA) process with HAP-based granules.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Ying Song, Jialing Ni, Yan Guo, Kengo Kubota, Wei-Kang Qi, Yu-You Li
Summary: In this study, an anammox upflow hybrid reactor was successfully used for nitrogen removal and the potential for phosphorus recovery was proposed. The researchers observed a heightoriented spatial pattern of removal capacities, biomass distribution, and HAP precipitates. They found that the intensity of HAP precipitates correlated with the amount of anammox biomass and the relative abundance of Candidatus Kuenenia, suggesting that HAP formation was influenced by the anammox reaction and organic matters. The fixed bed system was also found to play a crucial role in immobilizing the anammox biomass, organic matrix, and HAP precipitates, making HAP precipitation more achievable, effective, and practicable.
Review
Agricultural Engineering
Hui Cheng, Haojie Qin, Lei Liang, Yu-You Li, Jianyong Liu
Summary: This paper summarizes the state-of-the-art information on the anammox-HAP process, including its mechanism, the enhancement of anammox retention by HAP precipitation, and the upgrade of phosphorus recovery. However, challenges still exist, such as dealing with nitrogen residues and purifying the recovered HAP. To overcome these challenges, the paper proposes an AF-PD-Anammox-HAP process that combines anaerobic fermentation, partial denitrification, and anammox-HAP. This process removes organic and inorganic impurities and provides inorganic carbon for anammox bacteria.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Ying Song, Zhen Ma, Runda Du, Yan Guo, Yu Qin, Jun Tanno, Wei-Kang Qi, Yu-You Li
Summary: This study demonstrated the effectiveness of using cold-stored anammox granules for the treatment of dewatered liquid from dry fermentation, achieving fast and efficient nitrogen removal rates. Additionally, the specific anammox activity was significantly improved, showing promise for the treatment of high-strength wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Xueming Chen, Jinzhong Liu, Pengfei Huo, Fuyi Li, Linyan Yang, Wei Wei, Bing-Jie Ni
Summary: This study investigated the impacts of key granule properties on the performance of a granular reactor conducting partial nitritation/anammox from a modeling perspective. The findings can provide guidance for reliable modeling as well as practical startup and operation of the reactor.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Hao Xue, Weigang Wang, Hongchao Xie, Yayi Wang
Summary: This study compared different types of floating sludge and discussed the mechanisms of floating and measures to mitigate floating in anammox reactors. The results indicated that the floatation of sludge is related to gas accumulation or adhesion onto the sludges, and the reversibility of floatation depends on sludge intensity and hydraulic shear force.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Ying Song, Lan Lin, Jialing Ni, Haiyuan Ma, Wei-Kang Qi, Yu-You Li
Summary: The anammox process is a sustainable nitrogen removal technology with great potential in wastewater treatment. Utilizing HAP-anammox granules achieved high nitrogen removal efficiency under low temperature conditions.
Article
Environmental Sciences
Youqi Tao, Rui Shi, Linjing Li, Suhui Xia, Jianyong Ning, Wenlai Xu
Summary: This study addressed the issues of sludge floating and uneven mass transfer in up-flow partial denitrification/anammox (PDA) reactors by implementing two strategies: adding biological carriers and applying mechanical stirring. The results showed that both strategies effectively prevented sludge flotation and deterioration of settling performance. Mechanical agitation had a more significant positive impact on PDA performance compared to the addition of biocarriers as it achieved more adequate mass transfer.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Xiaochen Xu, Shiqi Ma, Hongbin Jiang, Fenglin Yang
Summary: The SNAD process is efficient and low-consuming in domestic sewage treatment, but faces challenges in phosphorus removal and strict C/N ratio limitations. The ANHA-SNAD/EBPR coupling process can simultaneously remove carbon, nitrogen, and phosphorus, achieving final removal rates of 91.59% and 89.10% respectively.
Review
Engineering, Environmental
Liwen Cao, Yang Yang, Yi Xue, Haiyuan Ma, Yu-You Li, Yong Hu
Summary: This paper firstly introduces the structure and formation mechanism of anammox-HAP multi-layer granules, and then summarizes the existing A-HAP based processes and reviews their superiority in wastewater treatment. In addition, three stable operating conditions are provided for better application of these processes, and the challenges and opportunities for future research and practical applications are discussed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Xuejie He, Shuohui Shi, Wei Huang, Xing Fan, Jian Zhou, Yihong Chen, Yingmu Wang
Summary: A novel electrolysis-integrated anammox (Ele-anammox) process was developed for intensified nitrogen removal and concomitant phosphorus recovery from nutrient-rich wastewater. The process achieved higher removal efficiencies of total nitrogen and total phosphorus compared to traditional anammox process, with an increase of 7.76% and 79.08% respectively. The microbial communities in Ele-anammox system showed a shift, with Candidatus Brocadia being enriched and Candidatus Kuenenia declining markedly. Precise release of soluble Fe2+ was achieved by anodic oxidation based on the proposed current control strategy. The solid phase of Ele-anammox was primarily Fe-P precipitation, similar to vivianite, with a vivianite content of 85%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Lin Shi, Tao Wang, Lei Yang, Chuntao Chen, Ran Dou, Xiaoli Yang, Bianjing Sun, Baojing Zhou, Lei Zhang, Dongping Sun
Summary: By changing the carbon source during the biosynthesis process, we have successfully improved the performance and preparation process of BC/HAp composite, enhancing its potential in biomedical applications such as bone tissue engineering.
CARBOHYDRATE POLYMERS
(2022)
Article
Engineering, Environmental
Pei Zhang, Yi-Min Ding, Tian-Lei Zhao, Yu-Han Wang, Qi-Zhi Yao, Sheng-Quan Fu, Gen-Tao Zhou
Summary: Biomineralization of struvite for recovering dissolved organic phosphorus (DOP) from wastewater is a promising approach. This study used Shewanella oneidensis MR-1 with high organic P-mineralizing ability to mineralize struvite from Pb2+-bearing wastewaters. The results showed that MR-1 can efficiently mineralize struvite and form pyromorphite particles tightly associated with bacterial biomass, achieving concurrent phosphorus recovery and Pb2+ removal.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Lan Lin, Ying Song, Yu-You Li
Summary: In this study, the anammox-hydroxyapatite (HAP) process was applied to achieve efficient nitrogen removal at a low temperature. The effect of inorganic carbon (IC) on the process was investigated, and it was found that IC had different effects on nitrogen and phosphorus removal. The phosphorus removal efficiency varied with the Ca/P ratio, and the formation of bio-induced HAP was confirmed using micro characterization technologies.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Jiayuan Ji, Runda Du, Jialing Ni, Yujie Chen, Yisong Hu, Yu Qin, Toshimasa Hojo, Yu -You Li
Summary: The anaerobic membrane bioreactor (AnMBR) has the potential to be a low-cost and energy-producing wastewater treatment process. This study evaluated a constant low-temperature (15 C) AnMBR for the treatment of real municipal wastewater, and demonstrated that it can achieve high removal efficiency and energy production under optimal operational conditions.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Qian Li, Yaqian Liu, Wenyu Gao, Gaojun Wang, Mawuli Dzakpasu, Yu-You Li, Rong Chen
Summary: This study investigated the role of biochar in the anaerobic co-digestion of waste activated sludge and food waste. The results showed that biochar facilitated the co-digestion process, particularly in the syntrophic methanogenesis of volatile fatty acids. The thermodynamic analysis revealed that biochar alleviated limitations imposed by high hydrogen partial pressure and expanded the thermodynamic windows. Furthermore, biochar triggered direct interspecies electron transfer and enhanced interspecies hydrogen transfer, promoting the syntrophic methanogenesis.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Zheng Kong, Haiyuan Ma, Yunqian Song, Xinyue Wang, Liqing Li, Yunsong Yuan, Zhiyu Shao, Hongxiang Chai
Summary: Media amendment significantly enhances the removal of dissolved nutrients in bioretention systems, but it is challenging to maintain both stability and efficiency during long-term operation. Therefore, in practical applications, factors such as catchment characteristics, prioritized pollutants, and meteorological factors should be considered when selecting suitable amended media and design factors to maximize the stability and efficiency of bioretention systems.
Review
Engineering, Environmental
Yi Xue, Haiyuan Ma, Yu -You Li
Summary: This article reviews previous studies on the lifecycle of anaerobic ammonium oxidation (anammox) granular sludge and proposes various sustainable formation mechanisms. The authors summarize the mechanisms of anaerobic, aerobic, and anammox granulation to understand anammox granulation. In the regeneration process, the formation of precursors for re-granulation is explained by the mechanisms of physical crushing, quorum quenching, and dispersion cue sensing. Future research should focus on filamentous bacteria in denitrification-anammox granulation cycle, QS/quorum quenching-based autoinducers, and the development of diversified mechanisms to understand the cycle and the cycle mechanisms of stored granules.
Article
Environmental Sciences
Sheng Ding, Feifei Wang, Hui Yue, Shaoyun Peng, Qizhen Ruan, Jinglan Lin, Wenzhi Cao
Summary: Soil erosion is a severe environmental problem in China, and soil and water conservation measures have played a crucial role in reducing streamflow and sediment yields. This study quantitatively explored the hydrological effects of these measures in the Tingjiang River Watershed, using a nested watershed approach and various statistical analyses. The results showed a significant downward trend in annual streamflow and sediment yields since the implementation of soil and water conservation measures, indicating their significant impact. Precipitation had a larger influence on streamflow than the conservation measures, but the contribution of the measures to sediment yields gradually dominated in the watershed. The establishment of an ecological threshold at 10% afforestation area revealed remarkable improvements in hydrological effects.
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
Green & Sustainable Science & Technology
Liang Zhang, Zhe Tian, Yunzhi Qian, Fuqiang Chen, Yu -You Li, Xueke Wang, Cuilian Fu, Yongzhi Chi
Summary: The long-term treatment of phosphorus-deficient wastewater using a one-stage partial nitrification-anammox (PNA) process may have negative effects on the growth of functional bacteria. A 650-day experiment was conducted using a lab-scale PNA system to study the impact of long-term phosphorus deficiency on nitrogen removal efficiency and sludge characteristics. It was found that phosphorus deficiency led to a decrease in nitrogen removal efficiency, high sludge volume index, and sludge bulking. The abundance of hzsA in flocs decreased significantly. However, the biofilm showed better resistance to phosphorus deficiency. After the addition of PO43--P, the nitrogen removal rate improved, and sludge bulking disappeared.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Jinghuan Luo, Li Jiang, Yuanyuan Wei, Yanmei Li, Guiyu Yang, Yu-You Li, Jianyong Liu
Summary: Alkaline anaerobic fermentation (AAF) coupled with EDTA addition was used to treat metal and EPSs-rich waste activated sludge (WAS). The addition of EDTA significantly promoted sludge solubilization and SCFAs production by chelating metals and destroying EPSs. This study provides an effective method for recovering carbon source from metal and EPSs-rich WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
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)
