BIORESOURCE TECHNOLOGY
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2023
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IF 11.4
Jiaxin Wang,Chiqian Zhang,Ping Li,Hui Xu,Weiwu Wang,Weizhao Yin,Jinhua Wu,Zhiqiang Hu
Tetrasphaera -enhanced biological phosphorus removal ( T -EBPR) was developed by augmenting conventional EBPR (C-EBPR) with Tetrasphaera to improve phosphorus removal from anaerobic digestate of swine wastewater. At influent total phosphorus (TP) concentrations of 45–55 mg/L, T -EBPR achieved effluent TP concentration of 4.17 ± 1.02 mg/L, 54 % lower than that in C-EBPR (8.98 ± 0.76 mg/L). The enhanced phosphorous removal was presumably due to the synergistic effect of Candidatus Accumulibacter and Tetrasphaera occupying different ecological niches. Bioaugmentation with Tetrasphaera promoted the polyphosphate accumulation metabolism depending more on the glycolysis pathway, as evidenced by an increase in intracellular storage compounds of glycogen and polyhydroxyalkanoates by 0.87 and 0.34 mmol C/L, respectively. The enhanced intracellular storage capacity was coincidentally linked to the increase in phosphorus release and uptake rates by 1.23 and 1.01 times, respectively. These results suggest bioaugmentation with Tetrasphaera could be an efficient way for improved phosphorus removal from high-strength wastewater.
研究领域:
环境工程
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微生物学
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DOI
PubMed
高影响因子
Water
·
2021
·Vol. 13
·期 24
·3497
·
IF 3.103
Zhongda Hu,Zijing Fan,Qixuan Song,Rabia Khatoon,Mei Zhang,Ning Wang,Xingzhang Luo
Tetracycline antibiotics (TCs) are a common type of antibiotic found in swine wastewater. Oxytetracycline (OTC) is a significant type of TC. This study mainly examined the influence of OTC on high-temperature anaerobic digestion by adding OTC to collections of swine wastewater at different times during the digestion process. The results showed that high-temperature anaerobic digestion was suitable for the removal of TCs, with an 87% OTC removal efficiency achieved by day 20. Additionally, OTC added from external sources was found to inhibit the chlortetracycline degradation process and affect the first-order degradation kinetic model of TCs. Complexation reactions were the main ways in which OTC affected the heavy metal content of the water. The exogenous addition of OTC was found to inhibit the activity of some digester microbial strains, reduce the proportion of dominant strains, such asMBA03, and kill certain specific strains. This performance alteration was most obvious when OTC was added in the middle of the reaction.Keywords:swine wastewater;high-temperature anaerobic digestion;tetracycline antibiotics;oxytetracycline
研究领域:
环境工程
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微生物学
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DOI
高影响因子
Biomass Conversion and Biorefinery
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2024
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IF 3.5
Ouyang Yue,Sun Wei,Tian Longjin,Liu Ying,Fan Guozhi,Pan Cheng,Cheng Qunpeng
In this study, the performance of biochar (BC)-supported cobalt (Co) and copper (Cu) (CoCu@BC) on tetracycline (TC) adsorption in aqueous solution and piggery wastewater was investigated. Scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area, Fourier-transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) were used to characterize the CoCu@BC adsorbent. The influence of initial pH, TC concentration, adsorbent dosage, and co-existing ions on TC adsorption performance was studied. Meanwhile, the adsorption kinetics, isotherm, and diffusion models were studied. The results showed that the CoCu@BC was characteristic of 142.1745 m 2 ·g −1 (BET surface area), 0.035987 cm 3 ·g −1 (microspore volume), and 3.74 (pH PZC ). The adsorption of TC on CoCu@BC well fitted with the pseudo-second-order model and the Freundlich isotherm. The maximum adsorption capacity of CoCu@BC was 621.118 mg/g, which was less influenced by pH while greatly inhibited by NO 2 − and SO 4 2− . Finally, the removal of TC (94.5%), NH 4 + -N (27%), and COD (18%) by CoCu@BC was carried out in piggery wastewater, indicating its superior performance in practice application.
研究领域:
环境科学
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污染控制
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材料科学
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DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
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2023
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IF 2.8
Hongxu Bao,Min Liu,Xianhui Li,Nanqi Ren,Jianzheng Li
A packed-bed anaerobic-aerobic reactor (PBAOR) with two anaerobic and two aerobic compartments was constructed to treat manure-free piggery wastewater which was characterized by high ammonium (NH4+-N) and low ratio of chemical oxygen demand (COD) to total nitrogen (TN). Performed for 60 days at the normal atmospheric temperature of 25 °C with a constant hydraulic retention time of 32 h and reflux ratio of 2.0, a stable state in pollutants removal was obtained in the PBAOR. Within the next routine operation process, the removal of COD, NH4+-N and TN was above 85.7%, 98.2% and 85.8%, with a residual less than 81.7, 7.2 and 39.9 mg L−1 in effluent, respectively. Twelve veterinary antibiotics classified into tetracyclines (TCs), sulphonamides (SAs) and fluoroquinolones (FQs) were detected from the piggery wastewater. The PBAOR was effective in removing TCs and SAs with an average removal of 74.8% and 93.3%, respectively, but presented a negative removal for FQs. Most COD in the piggery wastewater was mainly removed in the first two anaerobic compartments along with an obvious removal of TCs and SAs, while the TN were mainly removed in the last two aerobic compartments with the negative removal of FQs.
研究领域:
环境科学
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水处理工程
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畜牧学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Caiyu Luo,Yan Lin,Yupei Zhang,Shuai Zhang,Shehua Tong,Shaohua Wu,Chunping Yang
Antibiotics in swine wastewater could lead to risks to the environment and human health, and it is a competitive alternative to degrade antibiotics via photocatalysis which is green and eco-friendly. However, charge separation efficiency and light absorption capacity have been key factors limiting the technology. In this work, we synthesized the novel photocatalysts of MOF-545/Ag 3 PO 4 via solvothermal methods, and examine the performance and mechanism for the degradation of oxytetracycline (OTC) in swine wastewater. The results showed that compared with Ag 3 PO 4 , the composite catalysts have stronger photoresponse and charge separation ability. MOF-545/Ag 3 PO 4 could completely degrade OTC within 3.0 min with a rate constant of 3.97 min −1 which is 12.9 times that of Ag 3 PO 4 . OTC removal was still 100% within 3.0 min after 5 cycles, which confirmed that the composite catalyst was stable. Data from free radical capture tests showed that photogenerated holes (h + ) and superoxide radicals (•O 2 – ) played a dominant role in OTC degradation. In-situ X-ray photoelectron spectroscopy (XPS) spectra and electron spin resonance (ESR) spectra proved the formation of an S-scheme heterojunction in MOF-545/Ag 3 PO 4 , which greatly improves the carrier separation efficiency of catalysts. This study provides a novel MOF-based catalyst for improving photocatalytic performance.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Bo Sun,Yu Tian,Menglin Feng,Sihan Zhang,Hong Yang,Junmei Qin,Wenlong Bi,Xingxing Qiao,Fenwu Liu,Qingjie Hou
Flocculation is often used for the preliminary treatment of wastewater. However, pollutants especially some emerging contaminants, cannot be completely removed in this process. Meanwhile, the flocculated sludge may cause secondary pollution to the environment. This study investigates producing functional sludge biochar (FBC) from flocculated sludge obtained in the initial wastewater treatment phase, then introducing functional elements (Fe 3+ , Cu 2+ , Zn 2+ , and N) derived from flocculated sludge to modified waxberry-shaped TiO 2 photocatalyst. The next step involved using FBC/TiO 2 with functional elements for the deep degradation of swine wastewater. Under simulated sunlight, FBC/TiO 2 demonstrated a COD removal efficiency is 51.35 %, which is 2.65 times greater than that of pure TiO 2 . Furthermore, FBC/TiO 2 showed enhanced removal of dissolved organic matter (fulvic-like acids and soluble microbial products) and biotoxic substances from wastewater under both sunlight and visible light, particularly exhibiting significant efficacy in the removal of hard-degradation humic-like acids. In the photocatalytic process, water molecules oxidation by h + generates •OH, the primary reactive oxygen species responsible for organic matter degradation in wastewater. Applying this process to prepare FBC 15 /TiO 2 can lower sludge treatment costs for wastewater treatment plants while generating a profit of 52.28 $·kg −1 . This research offers a win–win solution for treating swine wastewater, promoting sludge reuse, and reducing the cost of TiO 2 deployment, thus presenting a new approach for efficient, cost-effective treatment of livestock and poultry wastewater.
研究领域:
环境科学
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污水处理
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材料科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Linlin Hao,Jingshuang Yan,Jiaoying Guo,Nannan Wang,Ming Zeng
Swine wastewater is a type of highly turbid wastewater with extremly high concentration of COD, NH 4 + , and total phosphorus. To address the drawbacks of commercial coagulants in the pretreatment of swine wastewater, such as loose flocs, slow settling rates, and the inability to remove NH 4 + , a novel Mg-Fe-Al hybrid magnetic coagulant (Mg/Fe/Al-MC) is prepared by using the high-pressure acid leaching (HPAL) technology based on iron tailings waste. Compared to atmospheric acid leaching (AAL), HPAL significantly increased the iron leaching rate from 22 % to 61 %. The specific surface area was increased from 5.1 to 9.2 m 2 /g. The study revealed the synergistic crystallization-coagulation-adsorption mechanism for the purification of swine wastewater. When the dosage of Mg/Fe/Al-MC was 2.5 g/L and pH was 9.0, the removal efficiency of NH 4 + reached 60 % by forming magnesium ammonium phosphate (MAP). Zeta potential results indicated that the coagulation mechanism of Mg/Fe/Al-MC is primarily based on electrostatic neutralization. After maturing Mg/Fe/Al-MC for 60 h, the content of essential polymeric Fe-Al hydroxide complexes [Fe(III)+Al(III)](b) reached 22.7 %. The insoluble porous particles exhibited a significant adsorption capacity, suggesting its important role in pollutant removal. Under the action of an external magnetic field, the settling velocity of Mg/Fe/Al-MC was significantly faster than that of polyaluminum chloride (PAC), with a much higher clear water yield of 75.5 %. This study provides new pathway for the enhanced pretreatment of swine wastewater.
研究领域:
环境科学
·
废水处理技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Zhiyan Huang,Tenglu Wang,Minxian Shen,Zhujian Huang,Yunxiao Chong,Lihua Cui
In order to achieve enhanced treatment of swine wastewater as well as resource recycle, in this work, we applied coagulation treatment on swine wastewater by adding Fe and Mg ions, MgFe layered double hydroxides (LDHs) was yielded during coagulation process and the coagulation sludge was recycled to prepare biochar composite catalyst. The removal rates of total phosphorus (TP) and chemical oxygen demand (COD) by Mg-Fe coagulation could achieve 82.55% and 98.51%, which is higher than that by coagulation with individual Mg 2+ or individual Fe 3+ . Finely dispersed MgFe-LDHs flocculation was formed during the coagulation process and was embedded within zoogloea, suspended particles, organic matters, etc. The obtained coagulation sludge was recycled to prepare biochar composite catalyst by oxygen-limited pyrolysis. Redox reaction of iron compounds and electron shuttles capacity of biochar in the catalyst could activate potassium peroxymonosulfate (PMS) to generate ·OH, ·OOH and 1 O 2 , which was responsible for catalysis potential. The as-prepared biochar composite catalyst showed satisfactory catalytic degradation capacity on tylosin and rhodamine B (pH value varied from 3 to 10), and the maximum degradation rate achieved 92.2% for tylosin and 81.9% for rhodamine B (RhB). Coagulation treatment of swine wastewater and in-situ formed layered double hydroxides recycling was suitable in wastewater treatment and resource recycling, of which the degradation rates of RhB were above 83% after five cycling experiments. In general, the combined process exhibits great potential for the deep treatment of swine wastewater and resource recycling for sludge.
研究领域:
环境科学
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污水处理
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催化材料
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jiang Teng,Yuheng Liu,Pei Li,Tianqiang Liu,Xiaoqiang Liu
Herein, a novel recyclable composite microsphere PnBC/ZIF-8-CNs was successfully synthesized by incorporating the zeolitic imidazolate framework-8 (ZIF-8) into 3-aminophenylboronic acid modified bacterial nanocellulose microspheres (PnBC-MS). The structural characteristics were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM) as well as element energy X-ray spectroscopy (EDS) mapping, X-ray diffraction (XRD), fourier transform infrared spectrometer (FT-IR), thermogravimetric analysis (TGA), XPS (X-ray photoelectron spectroscopy), and brunauer-emmett-teller (BET). The data showed that adsorption of PnBC/ZIF-8-CNs accorded with the pseudo-first-order kinetic model with spontaneous and endothermic process. The maximum adsorption capacity of tetracycline (1564.44 mg/g) enhanced by 1.2–5 folds compared with other adsorbents containing ZIF-8. The adsorption rate maintained at 81.25 % after five cycles of adsorption-desorption. The practical removal efficiency of tetracycline from real hoggery wastewater by PnBC/ZIF-8-CNs reached 89.77 %. Overall, these features suggested that PnBC/ZIF-8-CNs had simple preparation process, high removal efficiency and good reusability, and it will be a promising adsorbent for the actual antibiotics removal in water.
研究领域:
环境科学
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材料科学
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生物技术
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Yichen Zhang,Guozhong Shi,Weilong Wu,Amjad Ali,Hailong Wang,Quan Wang,Zhongyang Xu,Weidong Qi,Ronghua Li,Zengqiang Zhang
Amino hybrid biopolymer-decorated magnetic biochar composites (MTBC-2 N and MTBC-4 N) derived from green tea waste were synthesized and employed to recover phosphorus (P) from aqueous solution and swine wastewater, respectively. The amino hybrid biopolymer decoration decreased the surface area of the biochar composites but increased the nitrogen content of the MTBC-2 N and MTBC-4 N samples. The MTBC-2 N and MTBC-4 N remarkably promoted the dephosphorization of P-polluted waters than the raw biochar without amino hybrid biopolymer decoration. The kinetic adsorption of P onto MTBC-2 N and MTBC-4 N was simulated using the pseudo-second-order kinetic model and reached equilibrium within 4 h. The P adsorption isotherm was best fitted by the Langmuir model with the maximum adsorption capacities of 53.56 and 62.06 mg P/g for MTBC-2 N and MTBC-4 N, respectively. The tested MTBC-2 N and MTBC-4 N were regenerated and exhibited acceptable reusability. In addition, the adsorption of P onto MTBC-2 N and MTBC-4 N was regulated by electrostatic attraction and surface complexation processes. More than 88.2% and 96.5% of P were recovered by MTBC-2 N and MTBC-4 N from swine wastewater, respectively. Moreover, the pot experiment showed that the P-loaded biochar composites could potentially be used as alternative P fertilizers.
研究领域:
环境科学
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材料科学
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农业科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Jia-Xin He,Hou-Qun Yuan,Yu-Fei Zhong,Xiong-Xin Peng,Yi-Fan Xia,Si-Yi Liu,Qing Fan,Jun-Lan Yang,Ke Deng,Xiao-Ying Wang,Guang-Ming Bao
Tetracyclines (TCs), a type of antibiotics, are widely used in human therapy and animal husbandry. Public concerns about tetracyclines residues have been raised due to their negative impact on the environment and food, causing bacterias drug resistance and human health concerns. In this work, a luminescent europium MOF ( EuUCBA ) is constructed via post-synthetic attachment of Eu 3+ into a UiO-66 type MOF. The luminescent of EuUCBA exhibits high stability in aqueous media in the pH range of 4–11. Among 36 common veterinary drugs, the synthesized probe is highly selective and sensitive to six tetracyclines with low detection limits of 0.118 μM, 0.228 μM, 0.102 μM, 0.138 μM, 0.206 μM, and 0.078 μM for oxytetracycline (OTC), chlortetracycline (CTC), methylenetetracycline (MTC), minocycline (MOC), tetracycline (TC), and doxycycline (DOXY), respectively. Furthermore, the probe shows good anti-interference ability and fast response. Finally, EuUCBA was successfully to detect DOXY in swine wastewater and pig kidney with good recoveries. This work provides an excellent fluorescent sensor for highly selective and rapid detection of TCs residues in wastewater and complex biological samples.
研究领域:
分析化学
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环境科学
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材料科学
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食品安全
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产品关联
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2022
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IF 7.129
Wenjie Xu,Ziyi Yang,Hao Tang,Chen Wang,Zhengfang Ye
Tetracycline (TC) as one of the most widely used antibiotics commonly exists in aquaculture tail water and piggery wastewater, causing risks to human. However, the response of immobilized anaerobic denitrifying bacterial consortium to TC exposure lacks systematic research. In this study, the denitrification performance and the compositional shift of extracellular polymeric substances (EPS) and microbial community under TC stress were investigated. The inhabitation effect of TC on nitrate reduction of the immobilized bacterial consortium became evident at high concentrations (50 mg/L and 100 mg/L). Nitrite reduction was more sensitively inhibited than nitrate reduction. The inhabitation effect was mainly due to the fact that TC damaged cell membranes and subsequently effect the intracellular enzymes activities relating to denitrification (NAR and NIR activities). About 50% of TC can be removed by the immobilized bacterial consortium under all tested TC concentrations. Three-dimensional excitation-emission matrix (3D-EEM) results implied that the tryptophan like substances of EPS were obviously quenched with increasing TC concentration. EPS played an important role in TC removal. The denitification performance of the immobilized bacterial consortium under TC stress was attributed to the genera Paraccoccus , Pseudoxanthomonas , Diaphorobacter and Pseudomonas . Initial TC concentration obviously affected the microbial communities. This study may facilitate the management of aquaculture tail water and piggery wastewater contaminated with nitrate and antibiotics.
研究领域:
环境科学
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微生物学
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水处理
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废水管理
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）