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Integration of Bio-Enzyme-Treated Super-Wood and AIE-Based Nonwoven Fabric for Efficient Evaporating the Wastewater with High Concentration of Ammonia Nitrogen

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Nano-Micro Letters 2025年第8期 9-24页

作者： Qian Ding Bingqi Jin Yinxia Zheng Huiru Zhao Jun Wang Haoxuan Li Dong Wang Ben Zhong Tang Engineering Research Center of Technical Textiles Ministry of EducationCollege of Materials Science and EngineeringDonghua University State Key Laboratory of Pollution Control and Resources Reuse School of Environmental Science and EngineeringTongji University Nonwoven Technology Laboratory College of Textile Science and EngineeringJiangnan University Centre for AIE Research Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Material Science and EngineeringShenzhen University School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen (CUHK-Shenzhen)

The treatment of ammonia nitrogen wastewater（ANW） has garnered significant attention due to the ecology, and even biology is under increasing threat from over discharge ANW. Conventional ANW treatment methods often encounter challenges such as complex processes, high costs and secondary pollution. Considerable progress has been made in employing solar-induced evaporators for wastewater treatment. However, there remain notable barriers to transitioning from fundamental research to practical applications, including insufficient evaporation rates and inadequate resistance to biofouling. Herein, we propose a novel evaporator, which comprises a bio-enzyme-treated wood aerogel that serves as water pumping and storage layer, a cost-effective multi-walled carbon nanotubes coated hydrophobic/hydrophilic fibrous nonwoven mat functioning as photothermal evaporation layer,and aggregation-induced emission（AIE） molecules incorporated as anti-biofouling agent. The resultant bioinspired evaporator demonstrates a high evaporation rate of 12.83 kg m-2h-1when treating simulated ANW containing 30 wt% NH4Cl under 1.0 sun of illumination. AIE-doped evaporator exhibits remarkable photodynamic antibacterial activity against mildew and bacteria, ensuring outstanding resistance to biofouling over extended periods of wastewater treatment. When enhanced by natural wind under 1.0 sun irradiation, the evaporator achieves an impressive evaporation rate exceeding 20 kg m-2h-1. This advancement represents a promising and viable approach for the effective removal of ammonia nitrogen wastewater.

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Enhanced treatment of sludge drying condensate by A/O-MBR process: Microbial activity and community structure

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Chemosphere 2023年第1期340卷 139911页

作者： Zhang, Yin Hu, Weijie Lin, Lifeng Bu, Shiying Guan, Zhangqin Zhang, Jie Wang, Qiaoying State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological Security School of Environmental Science and Engineering Tongji University Shanghai200092 China Co. Ltd Shanghai200092 China Shanghai Zizheng Environmental Technology Co. Ltd Shanghai200086 China

With the rapid increase of sludge production from sewage treatment plants, the treatment of sludge drying condensate rich in a large amount of pollutants urgently needs to be addressed. Due to the unique characteristics of sludge drying condensate (high ammonia nitrogen and COD concentration), there are almost no reports on biological treatment methods specifically targeting sludge drying condensate. In this study, A/O-MBR process was proposed for sludge drying condensate treatment and the effects of ammonia nitrogen loads, alkalinity and aeration intensity were explored. Experimental results show that under the ammonia nitrogen load of 0.35 kg NH4+-N/(m3·d) and the aeration intensity of 0.5 m3/(m2·min), the removal rate of COD and NH4+-N could reach 94% and 99.86% with the addition of alkalinity (m(NaHCO3): m(NH4+-N) = 7:1), respectively. The distribution of living and dead microbial cells in the activated sludge of three reactors also proved that the supplement of alkalinity in the influent can ensure the feasible living conditions for microorganisms. In addition to traditional nitrifying bacteria, through the supplementation of alkalinity and the reduction of aeration intensity, the system had also domesticated high abundance heterogeneous nitrification aerobic denitrification (HN-AD) and aerobic denitrification bacteria (both more than 10% of the total bacterial count). The denitrification process of sludge drying condensate was simplified and the denitrification efficiency was greatly improved. The findings of this study could provide important theoretical guidance for the biological treatment process of sludge drying condensate. © 2023 Elsevier Ltd

关键词： Nitrification

Direct Lactic Acid Production from Household Food Waste by Lactic Acid Bacteria

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SSRN 2022年

作者： Song, Liang Liu, Shiyu Liu, Rui Yang, Donghai Dai, Xiaohu State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

China is vigorously promoting garbage classification, but the treatment of classified waste, especially household food waste (HFW) has yet to be studied. Lactic acid (LA), a high value-added platform molecule has broad market prospects. Although there have been many studies on the production of LA from food waste, open fermentation often produces lots of by-products, while the traditional fermentation under a pure bacteria system often requires the saccharification process, which increases the production cost. We sought to analyze the comprehensive properties of classified HFW in Shanghai, then to produce LA by inoculating lactic acid bacteria (LAB) directly. The effects of strains, temperature, sterilized or not, initial pH, inoculum size, and substrate concentration on LA production were investigated. HFW was rich in nutrients and grow factors which provided the possibility for direct LA production from HFW by inoculating LAB. The results showed that Lactobacillus rhamnosus ATCC 7469, Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus all could be used as the inoculum, however, no significant synergistic effect of the three strains on LA production was found. LA concentration of 30.25 g/L at 37 °C , pH 6.8 could be obtained by inoculating Lactobacillus rhamnosus ATCC 7469 from sterilized HFW. High inoculum size and substrate concentration resulted in high LA concentration, but not high LA yield. The result of ANOVA indicated that there was a significantly positive relationship between substrate concentration and LA concentration (r=0.942, p © 2022, The Authors. All rights reserved.

关键词： Lactic acid

Submerged Macrophyte Promoted Nitrogen Removal Function of Biofilms in Constructed Wetland

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SSRN 2023年

作者： Jiang, Xue Wang, Mengmeng He, Di Zhu, Jinling Yang, Shunqing Fang, Fei Yang, Liuyan State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China School of Resources and Environment Anqing Normal University Anqing246133 China

Biofilm is one of the important factors affecting nitrogen removal in constructed wetlands (CWs). However, the impact of submerged macrophyte on nitrogen transformation of biofilms on leaves of submerged macrophyte and matrix remains poorly understood. In the study, the CWs with Vallisneria natans and with artificial plant were established to investigate the effects of submerged macrophyte on nitrogen transformation and the composition of nitrogen cycling bacteria to probe nitrogen removal functions of biofilms under high ammonium nitrogen (NH4+-N) loading. The average removal rates of total nitrogen and NH4+-N in CW with V. natans reached 71.38% and 82.08%, respectively, showing increases by 24.19% and 28.79% compared with the control with artificial plant. Scanning electron microscope images indicated that high NH4+-N damaged leaf cells, resulting in the release of cellular contents which increased aqueous total organic carbon in CW with V. natans. However, the specific surface area and carrier function of V. natans were unaffected within 25 days. As a kind of natural organic matters, submerged macrophyte provided organic matters for the bacterial growth in biofilms in CW. Bacterial composition analysis revealed that the phylum Proteobacteria was predominant in CW with V. natans. The numbers of nitrifiers and denitrifiers in leaf biofilms reached 1.66 × 105 cells/g and 1.05 × 107 cells/g, as well as 2.79 × 105 cells/g and 7.41 × 107 cells/g in matrix biofilms, respectively. Submerged macrophyte elevated the numbers of nitrogen-converting bacteria and promoted the expression of nitrification (amoA and hao) and denitrification genes (napA, nirS and nosZ) in leaf biofilms and matrix biofilms, which facilitated nitrogen conversion in CW with V. natans. Therefore, this study highlighted the effects of submerged macrophyte on biofilm functions, providing a scientific basis for the nitrogen removal of biofilms in CWs. © 2023, The Authors. All rights reserved.

关键词： Wetlands

Mechanistic Exploration of COVID-19 Antiviral Drug Ritonavir on Anaerobic Digestion Through Experimental Validation Coupled with Metagenomics Analysis

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SSRN 2024年

作者： Wang, Ruming Wang, Zhuoqin Yuan, Haiping Li, Chunxing Zhu, Nanwen School of Environmental Science and Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

The aggregation of antiviral drugs (ATVs) in waste activated sludge (WAS) and their migration and transformation during WAS treatment pose considerable environmental exposure, so it is crucial to understand the behavior of these agents during WAS treatment. This study investigated the effects of ritonavir (RIT), an ATV used to treat human immunodeficiency virus infection and coronavirus disease 2019, on anaerobic digestion (AD) of WAS to reveal the mechanisms by which it interferes with anaerobic flora. The dosage influence results showed that methane production in AD of WAS decreased by 46.56% when RIT concentration was increased to 1000 μg/kg total solids (TS). The AD staging test revealed that RIT mainly stimulated microbial synthesis of the extracellular polymeric substance (EPS), limiting organic matter solubilization. At 500 μg/kg TS, RIT decreased CHO and CHON levels in dissolved organic matter by 23.12% and 56.68%, respectively, significantly reducing substrate availability to microorganisms. Metagenomic analysis of microbial functional gene sets revealed that RIT had greater inhibitory effects on protein and amino acid metabolism than on carbohydrate metabolism. Under RIT stress, methanogens switched from hydrogenotrophic and acetotrophic methanogenesis to methylotrophic and acetotrophic methanogenesis. © 2024, The Authors. All rights reserved.

关键词： Anaerobic digestion

Bio-Production of Lactic Acid from Household Food Waste Under Hyperthermophilic Conditions

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SSRN 2022年

作者： Song, Liang Liu, Rui Liu, Shiyu Yang, Donghai Dai, Xiaohu State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

The recovery of high value-added products, lactic acid (LA) from household food waste (HFW) by anaerobic fermentation has attracted more and more attention. There are few studies on the production of LA by anaerobic fermentation under hyperthermophilic conditions. In this study, the LA was produced by anaerobic fermentation from HFW under hyperthermophilic conditions (70 ± 1 °C) and different pH values (5.0, 7.0, and 9.0), and compared with the LA production under mesophilic (35 ± 1 °C) and thermophilic (52 ± 1 °C) conditions. The result showed that the highest LA production occurred at pH7_70 with a concentration of 17.75 ± 1.51 g/L. The solubilization of organics, high activities of lactic dehydrogenase (LDH), and low activities of acetate kinase (ACK) resulted in high LA concentration and proportion under hyperthermophilic conditions. The result of microbial community structures showed that LA production at 70 °C was dominated by Lactobacillus and Clostridium. © 2022, The Authors. All rights reserved.

关键词： Lactic acid

Insights into Ph and Temperature on the Lactic Acid Production from Household Food Waste in an Open System by Semi-Continuous Fermentation

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SSRN 2022年

The recovery of high value-added products, lactic acid (LA), from household food waste (HFW) by anaerobic fermentation in an open system has attracted more and more attention. However, there has been disagreement on the operation conditions, especially the pH and temperature. In this study, the HFW was fermented in nine semi-continuous reactors at different pH (5.0, 7.0, and 9.0) and temperatures (35 °C, 52 °C, and 70 °C). The result showed that the highest LA production occurred at pH7_70 with a concentration of 17.75 ± 1.51 g/L, accounting for 76%. The highest volatile fatty acids concentration occurred at pH 9 under mesophilic conditions with a concentration of 24.37 ± 1.31 g/L, and the acetic acid was the main component of VFAs, accounting for 62%. A significant positive correlation was found between relative activities of lactic dehydrogenase (LDH) and LA concentration, r = 0.928, p © 2022, The Authors. All rights reserved.

关键词： Lactic acid

Promotional Effect of Doping Aluminum on the Sulfated Fe2o3 Catalyst in Nh3-Scr Reaction

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SSRN 2023年

作者： Wang, Xuping Fang, Siyong Zhang, Lei Ma, Menglan Li, Mingjing Huang, Yangyang Li, Tingzhen Zhang, Liuyi Zou, Weixin Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir School of Environmental and Chemical Engineering Chongqing Three Gorges University Chongqing404000 China Chongqing Chemical Industry Vocational College Chongqing401220 China State Key Laboratory of Pollution Control and Resource Reuse School of Environment Jiangsu Key Laboratory of Vehicle Emissions Control Nanjing University Nanjing210023 China

FemAlnOx catalysts were synthesized by the co-precipitation method and sulfated by (NH4)2SO4 impregnation method. Among the catalysts, 1.2S/Fe3Al1Ox exhibits more than 90% NO conversion in the range of 260−410 ℃ both in the catalytic activity and the resistance to K poisoning testing. Structures and physicochemical properties of catalysts were measured via different characterization techniques. Through comparative studies between 1.2S/Fe2O3 and 1.2S/Fe3Al1Ox, it is found that doping Al into Fe2O3 can reduce its particle size, increase its specific surface area, and suppress the formation of crystalline phase Fe2(SO4)3 at high calcination temperature, which is propitious to generate more surface sulfates on FemAlnOx. NH3-TPD and in-situ DRIFTS prove that K ions preferentially interact with surface sulfates, and more surface sulfates can provide more Brönsted acid sites to obtain higher ability of resistance to K poisoning. This work provides a simple strategy to improve the catalytic performances of Fe-based catalysts. © 2023, The Authors. All rights reserved.

关键词： Catalyst activity

Simultaneous Removal of Cr, Cu, Zn and Cd by Nano Zero-Valent Iron Modified Sludge Biochar in High Salinity Wastewater

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SSRN 2024年

作者： Zhao, Shirong Li, Qian Tang, Zheng Yang, Yan Gao, Pin Qian, Yajie Chen, Jiabin Xue, Gang College of Environmental Science and Engineering Donghua University Shanghai201620 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai201620 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Cr, Cd, Zn and Cu commonly coexisted in the electroplating wastewater with high salinity and organics, while their removal was often investigated individually. In this study, the simultaneous removal of Cr, Cd, Zn and Cu was investigated by nano zero-valent iron modified sludge biochar (nZVI@SBC). The results show that nZVI@SBC could significantly improve the removal efficiency of the four heavy metals (HMs) in high salinity wastewater. NO3- (N-NO3-) and humic acid (HA) could promote the removal of Cr, Cd, Zn and Cu, and PO43- (P-PO43-) could enhance the removal of Cd. EPR analysis indicated the generation of 1O2 in different water matrices. The 1O2 intensity was increased in the presence of NO3- and HA, which accelerated the corrosion of nZVI and promoted the electron transfer in the system. To further understand the reaction mechanism, the variation of nZVI@SBC structures and compositions during the treatment process were characterized by SEM-EDS, XRD, BET and XPS. Cr and Cu were removed through adsorption and co-precipitation after reduction by nZVI, while Cd and Zn were removed by alkali precipitation and complexation. This work improves the understanding of simultaneous removal of HMs by nZVI@SBC and provides a cost-effective approach for the high-salinity organic electroplating wastewater treatment. © 2024, The Authors. All rights reserved.

关键词： Cost effectiveness