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< Page ,Total 248 >
A~2/O-BCO前置反硝化除磷中试的启动与优化运行
期刊论文 | 2024 , 44 (03) , 13-22 | 环境科学学报
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Abstract :

为探究低C/N城镇污水处理在无外加碳源的情况下实现深度脱氮除磷的效能,试验以实际城镇生活污水为处理对象,搭建了日处理规模为100 m~3·d~(-1)的A~2/O-BCO前置反硝化除磷中试,并从中试快速启动、工况调整与优化、微生物群落分析等角度进行研究.结果表明,通过先在A~2/O单元与BCO单元中分别富集聚磷菌与硝化菌,再增加硝化液回流以富集反硝化除磷菌(DPAOs)的方式,可实现A~2/O-BCO前置反硝化除磷中试的快速启动.A~2/O单元厌氧/缺氧/好氧容积比调整为3∶5∶1,硝化液回流比设定为250%时,缺氧段对磷去除率的平均值达到95%,平均出水PO_4~(3-)-P浓度小于0.2 mg·L~(-1),出水TN小于11 mg·L~(-1).通过分子生物学分析发现,除磷菌(PAOs)与硝化菌丰度显著提高,Candidatus Accumulibacter的相对丰度从原始种泥的2%增加到14%,已被证实具有反硝化聚磷功能的Dechloromonas的相对丰度从原始种泥的2%增加到7%,BCO单元中的生物膜上,Nitrosomonas的相对丰度为5.91%,Nitrospira的相对丰度为7.58%.

Keyword :

前置反硝化除磷 前置反硝化除磷 快速启动 快速启动 无外加碳源 无外加碳源 低C/N城镇污水 低C/N城镇污水 中试规模 中试规模

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GB/T 7714 周庆国 , 苏健 , 陈东旭 et al. A~2/O-BCO前置反硝化除磷中试的启动与优化运行 [J]. | 环境科学学报 , 2024 , 44 (03) : 13-22 .
MLA 周庆国 et al. "A~2/O-BCO前置反硝化除磷中试的启动与优化运行" . | 环境科学学报 44 . 03 (2024) : 13-22 .
APA 周庆国 , 苏健 , 陈东旭 , 彭永臻 . A~2/O-BCO前置反硝化除磷中试的启动与优化运行 . | 环境科学学报 , 2024 , 44 (03) , 13-22 .
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Saturated dissolved oxygen-driven high-rate and ultrastable partial nitrification in municipal wastewater SCIE
期刊论文 | 2024 , 413 | BIORESOURCE TECHNOLOGY
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Achieving stable and high-rate partial nitrification (PN) remains a worldwide technical conundrum in lowstrength mainstream conditions. This study successfully achieved ultrarapid mainstream PN within 8 days under a saturated dissolved oxygen (DO) supply strategy, reaching a record-breaking PN rate of over 1.0 kg N m(- 3) d(- 1) treating municipal wastewater. Stable PN was maintained for over 200 days with an ultrahigh nitrite accumulation ratio of 98.5 +/- 0.9 %, resilient to seasonal fluctuations in temperature (16.0-25.6 degrees C) and load (NH4+-N, 40-80 mg N/L). Kinetics revealed a remarkable 159.1-fold increase in the maximum activity ratio of ammonia-oxidizing bacteria (AOB) to nitrite-oxidizing bacteria (NOB). The faster response of AOB to saturated DO stimulated its highest activity difference with NOB, contributing to the AOB (Nitrosomonas oligotropha) boom and the elimination of NOB groups (-99.9 %). Our results highlight the importance of promoting AOB rather than solely focusing on NOB suppression for initiating and stabilizing high-rate mainstream PN.

Keyword :

Dissolved oxygen Dissolved oxygen Mainstream wastewater Mainstream wastewater NOB elimination NOB elimination Nitrite accumulation Nitrite accumulation Ammonium oxidation rate Ammonium oxidation rate

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GB/T 7714 Dan, Qiongpeng , Li, Xiyao , Zhang, Fangzhai et al. Saturated dissolved oxygen-driven high-rate and ultrastable partial nitrification in municipal wastewater [J]. | BIORESOURCE TECHNOLOGY , 2024 , 413 .
MLA Dan, Qiongpeng et al. "Saturated dissolved oxygen-driven high-rate and ultrastable partial nitrification in municipal wastewater" . | BIORESOURCE TECHNOLOGY 413 (2024) .
APA Dan, Qiongpeng , Li, Xiyao , Zhang, Fangzhai , Du, Rui , Li, Jialin , Wang, Tong et al. Saturated dissolved oxygen-driven high-rate and ultrastable partial nitrification in municipal wastewater . | BIORESOURCE TECHNOLOGY , 2024 , 413 .
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Effect of anaerobic duration on nitrogen and phosphorus removal and carbon source utilization in integrated denitrifying phosphorus removal and partial denitrification coupled with anammox system SCIE
期刊论文 | 2024 , 474 | JOURNAL OF CLEANER PRODUCTION
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For low carbon-to-nitrogen ratio municipal wastewater, full utilization of carbon sources is positive in reducing carbon emissions and carbon source addition. This study evaluated and proposed appropriate anaerobic duration control to improve nitrogen and phosphorus removal performance in Denitrifying Phosphorus Removal and Partial Denitrification coupled with Anammox (DPR-PDA) system. Excessive anaerobic duration resulted in wasted carbon source, anaerobic stage should be stopped after carbon source had been utilized. Hydraulic Retention Time-Anaerobic (HRT-An) of R1 was shortened from 5h to 0.56h, while R2 was maintained at 5h. The removal efficiency of nitrate (NO3-) were 91.7% in R1 and 71.5% in R2. Peak of NO2- accumulation (Peak-NO2--N) during denitrification in R1 was 4.5 times than in R2. Candidatus_Brocadia as anammox bacteria was self-enriched, the abundance in R1 was 4.67 times than in R2. This provided a practical guide for optimization of wastewater treatment processes and application of anammox technology.

Keyword :

Anammox bacteria self-enrichment Anammox bacteria self-enrichment Anaerobic duration Anaerobic duration Nitrite accumulation Nitrite accumulation Carbon source utilization Carbon source utilization

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GB/T 7714 Su, Yunlong , Li, Xiyao , Wang, Jiao et al. Effect of anaerobic duration on nitrogen and phosphorus removal and carbon source utilization in integrated denitrifying phosphorus removal and partial denitrification coupled with anammox system [J]. | JOURNAL OF CLEANER PRODUCTION , 2024 , 474 .
MLA Su, Yunlong et al. "Effect of anaerobic duration on nitrogen and phosphorus removal and carbon source utilization in integrated denitrifying phosphorus removal and partial denitrification coupled with anammox system" . | JOURNAL OF CLEANER PRODUCTION 474 (2024) .
APA Su, Yunlong , Li, Xiyao , Wang, Jiao , Du, Rui , Xue, Xiaofei , Shi, Yanwei et al. Effect of anaerobic duration on nitrogen and phosphorus removal and carbon source utilization in integrated denitrifying phosphorus removal and partial denitrification coupled with anammox system . | JOURNAL OF CLEANER PRODUCTION , 2024 , 474 .
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Novel Anoxic-Anaerobic-Oxic process successfully enriched anammox bacteria under actual municipal wastewater SCIE
期刊论文 | 2024 , 412 | BIORESOURCE TECHNOLOGY
WoS CC Cited Count: 1
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Abstract :

Anaerobic ammonia oxidation (Anammox) exhibits promise for wastewater treatment, but the enrichment of anammox bacteria (AnAOB) in municipal wastewater treatment plants is a significant challenge. This study constructed a novel Anoxic-Anaerobic-Oxic An aerobic-Oxic (AAnO) process with a pure biofilm anoxic zone fed with actual fluctuating municipal wastewater and operated for six months to enrich AnAOB at ambient temperature. High- throughput sequencing (HTS), qPCR, and fluorescence in situ hybridization showed that AnAOB were successfully enriched in the anoxic biofilms, reaching 1.56 % relative abundance on day 75 detected by HTS. During the period from day 130 to day 186, the anammox process contributed to 55.8 +/- 19.2 % of the nitrogen removal in the anoxic zone. Phylogenetic analysis revealed this AnAOB species was closely related to Candidatus Brocadia fulgida. . This study provides technical support for the application of anammox in mainstream wastewater.

Keyword :

Biofilm Biofilm Partial denitrification Partial denitrification Fluctuating municipal wastewater Fluctuating municipal wastewater Ambient temperature Ambient temperature

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GB/T 7714 Chen, Guo , Li, Jianwei , Zhang, Shujun et al. Novel Anoxic-Anaerobic-Oxic process successfully enriched anammox bacteria under actual municipal wastewater [J]. | BIORESOURCE TECHNOLOGY , 2024 , 412 .
MLA Chen, Guo et al. "Novel Anoxic-Anaerobic-Oxic process successfully enriched anammox bacteria under actual municipal wastewater" . | BIORESOURCE TECHNOLOGY 412 (2024) .
APA Chen, Guo , Li, Jianwei , Zhang, Shujun , Gao, Xiaoyu , Gu, Changkun , Lv, Xintao et al. Novel Anoxic-Anaerobic-Oxic process successfully enriched anammox bacteria under actual municipal wastewater . | BIORESOURCE TECHNOLOGY , 2024 , 412 .
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Achieving advanced nitrogen removal with anammox and endogenous partial denitrification driven by efficient hydrolytic fermentation of slowly-biodegradable organic matter SCIE
期刊论文 | 2024 , 414 | BIORESOURCE TECHNOLOGY
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Anammox-based processes are pivotal for elevating nitrogen removal efficiency in municipal wastewater treatment. This study established a novel HF-EPDA system combined in-situ hydrolytic fermentation (HF) with endogenous partial denitrification (EPD) and anammox. Slowly-biodegradable organic matter (SBOM) was degraded and transformed into endogenous polymers for driving production of sufficient nitrite by EPD, further promoted the nitrogen removal via anammox process. Processes above formed positive feedback, guaranteeing the robustness and recoverability of system. After a 92-day suspension during operation, advanced nitrogen removal was still achieved with excellent nitrogen removal efficiency of 95.84 +/- 1.73 %, treating with actual domestic wastewater and synthetic nitrate wastewater. Candidatus Brocadia and Candidatus Competibacter were dominant bacteria on biofilms responsible for the anammox and EPD process respectively, while the main hydrolytic fermentation organisms norank_o SBR1031 was enriched in floc sludge. This study highlights the reliable potential for expanding anammox application with simultaneous improvement of SBOM utilization.

Keyword :

Slowly-biodegradable organic matter (SBOM) Slowly-biodegradable organic matter (SBOM) Anammox Anammox Hydrolytic fermentation (HF) Hydrolytic fermentation (HF) Endogenous partial denitrification (EPD) Endogenous partial denitrification (EPD)

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GB/T 7714 Xie, Chen , Li, Xiyao , Zhang, Qiong et al. Achieving advanced nitrogen removal with anammox and endogenous partial denitrification driven by efficient hydrolytic fermentation of slowly-biodegradable organic matter [J]. | BIORESOURCE TECHNOLOGY , 2024 , 414 .
MLA Xie, Chen et al. "Achieving advanced nitrogen removal with anammox and endogenous partial denitrification driven by efficient hydrolytic fermentation of slowly-biodegradable organic matter" . | BIORESOURCE TECHNOLOGY 414 (2024) .
APA Xie, Chen , Li, Xiyao , Zhang, Qiong , Zhang, Lujing , Cao, Xiaoxin , Peng, Yongzhen . Achieving advanced nitrogen removal with anammox and endogenous partial denitrification driven by efficient hydrolytic fermentation of slowly-biodegradable organic matter . | BIORESOURCE TECHNOLOGY , 2024 , 414 .
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Feasibility of double nitrite supply through partial nitrification and partial denitrification driven by sludge fermentation SCIE
期刊论文 | 2024 , 414 | BIORESOURCE TECHNOLOGY
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Abstract :

Challenges in obtaining stable nitrite have impeded the use of anammox in municipal wastewater treatment. This study explored the feasibility of using sludge fermentation products as carbon source and selective nitrification inhibitor to supply nitrite via partial nitrification (PN) and partial denitrification (PD). PD was initiated within 15 days, achieving nitrite transformation rate of over 90 % with a carbon/nitrogen ratio of 3 and a reaction time of 0.75 h. The dominant genus, Romboutsia, increased in relative abundance from 4.1 to 35 %. Organic acids in sludge fermentation products, like acetate (200 mg/L) and propionate (400 mg/L), selectively suppressed nitriteoxidizing bacteria (NOB) more than ammonia-oxidizing bacteria (AOB), leading to PN. Combining anaerobic exposure with sludge fermentation products addition achieved PN with over 80.0 % nitrite accumulation. AOB increased tenfold in the long term, significantly outpacing NOB growth. This strategy simplifies difficulty of anammox application and shows broad application potential in municipal wastewater treatment.

Keyword :

Short-chain fatty acids Short-chain fatty acids Carbon source Carbon source Microbial community Microbial community Nitrification inhibitor Nitrification inhibitor Nitrite accumulation Nitrite accumulation

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GB/T 7714 Liu, Jinjin , Wang, Rui , Qiu, Shengjie et al. Feasibility of double nitrite supply through partial nitrification and partial denitrification driven by sludge fermentation [J]. | BIORESOURCE TECHNOLOGY , 2024 , 414 .
MLA Liu, Jinjin et al. "Feasibility of double nitrite supply through partial nitrification and partial denitrification driven by sludge fermentation" . | BIORESOURCE TECHNOLOGY 414 (2024) .
APA Liu, Jinjin , Wang, Rui , Qiu, Shengjie , Peng, Yi , Peng, Yongzhen . Feasibility of double nitrite supply through partial nitrification and partial denitrification driven by sludge fermentation . | BIORESOURCE TECHNOLOGY , 2024 , 414 .
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面向碳中和的污水低能耗脱氮及氮回收技术探讨
期刊论文 | 2023 , 49 (04) , 1-6 | 水处理技术
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Abstract :

为应对严重的水污染问题,污水排放标准越来越严格。污染物的深度去除,通常需要消耗大量的电能并经常性投加大量的化学药剂,这导致污水厂间接碳排放量巨大,环境效益降低,违背低碳可持续发展的原则。污水碳中和的达成可通过节能降耗、资源回收以及自身产能来实现。在能源紧缺,实现碳中和迫在眉睫的背景下,全面推进节能降耗技术的应用是最现实且有望短期实现的策略。脱氮是目前城市污水处理厂的关键任务,能耗占比大,本文即针对现有的污水脱氮途径和技术,从降低能源消耗以及实现资源回收两个方面出发,对能耗低、具有可持续性且具有应用前景的工艺进行总结。重点对厌氧氨氧化工艺(Anaerobic ammonium oxidation, Anammox),以及能实现能源回收的CANDO(Coupled aerobic-anoxic nitrous decomposition operation)工艺进行更为全面系统的综述,指出现有的技术问题和研究瓶颈,以期为污水脱氮技术的低碳发展及工程应用提供参考。

Keyword :

污水 污水 可持续 可持续 碳中和 碳中和 厌氧氨氧化 厌氧氨氧化 脱氮 脱氮

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GB/T 7714 王伟 , 王明刚 , 刘丽娜 et al. 面向碳中和的污水低能耗脱氮及氮回收技术探讨 [J]. | 水处理技术 , 2023 , 49 (04) : 1-6 .
MLA 王伟 et al. "面向碳中和的污水低能耗脱氮及氮回收技术探讨" . | 水处理技术 49 . 04 (2023) : 1-6 .
APA 王伟 , 王明刚 , 刘丽娜 , 张鑫 , 彭永臻 . 面向碳中和的污水低能耗脱氮及氮回收技术探讨 . | 水处理技术 , 2023 , 49 (04) , 1-6 .
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Adding organics to enrich mixotrophic sulfur-oxidizing bacteria under extremely acidic conditions-A novel strategy to enhance hydrogen sulfide removal SCIE
期刊论文 | 2023 , 854 | SCIENCE OF THE TOTAL ENVIRONMENT
WoS CC Cited Count: 4
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Biotreatment of high load hydrogen sulfide (H2S) can lead to rapid acidification of a bioreactor, which greatly challenges the application of bio-desulfurization technology. In this study, the bio-desulfurization performance was improved by enriching acidophilic mixotrophic sulfur-oxidizing bacteria (SOB) by adding organics under extremely acidic conditions (pH < 1.0). A biotrickling filter (BTF) for the removal of H2S was established and operated under pH < 1.0 for 420 days. In the autotrophic period, the maximum H2S elimination capacity (ECmax-H2S) was 135.8 g/ m(3)/h with biofilm mass remaining within 11.1 g/L-BTF. The autotrophic SOB bacterium Acidithiobacillus was dominant (62.1 %). When glucose was added to the BTF system, ECmax-H2S increased by 272 % to 464.3 g/m(3)/h as biofilm mass increased to 22.3 g/L-BTF. The acidophilic mixotrophic SOB bacteria Mycobacterium (78.4 %) and Alicyclobacillus (20.7 %) were enriched while Acidithiobacillus was gradually eliminated (< 0.1 %). Furthermore, the major sulfur me-tabolism pathways were identified to explore the desulfurization mechanism under extremely acidic conditions. To maintain optimal desulfurization performance and avoid biofilm overgrowth in the BTF system, biofilm mass should be maintained within 20-22 g/L-BTF. This can be achieved by adding 1.0 g/L-BTF glucose every 20 days under a load rate of H2S in 50-90 g/m3/h anda trickling liquid velocity of 1.8 m/h. Extremely acidic conditions eliminated non-aciduric microorganisms so that the addition of organics can increase the abundance of acidophilic mixotrophic SOB (> 99 %), thus offering a novel strategy for enhancing H2S removal.

Keyword :

Biofilm mass Biofilm mass H2S removal H2S removal Mixotrophic SOB Mixotrophic SOB Extremely acidic conditions Extremely acidic conditions Sulfur metabolism pathways Sulfur metabolism pathways

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GB/T 7714 Jia, Tipei , Zhang, Liang , Sun, Shihao et al. Adding organics to enrich mixotrophic sulfur-oxidizing bacteria under extremely acidic conditions-A novel strategy to enhance hydrogen sulfide removal [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 854 .
MLA Jia, Tipei et al. "Adding organics to enrich mixotrophic sulfur-oxidizing bacteria under extremely acidic conditions-A novel strategy to enhance hydrogen sulfide removal" . | SCIENCE OF THE TOTAL ENVIRONMENT 854 (2023) .
APA Jia, Tipei , Zhang, Liang , Sun, Shihao , Zhao, Qi , Peng, Yongzhen . Adding organics to enrich mixotrophic sulfur-oxidizing bacteria under extremely acidic conditions-A novel strategy to enhance hydrogen sulfide removal . | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 854 .
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Rapid Determination of Trace Elements in Water by Total Reflection X-Ray Fluorescence Spectrometry Using Direct Sampling SCIE
期刊论文 | 2023 , 43 (3) , 990-996 | SPECTROSCOPY AND SPECTRAL ANALYSIS
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Compared with the complicated enrichment procedure, a rapid, simple and reliable method is urgently needed to determine trace metal elements in drinking water. Total reflection X-ray Fluorescence spectrometry (TXRF) is a convenient and quantitative method for simultaneous analysis of trace multi-metal elements requiring less samples and short measured time and can be analysed directly without samples pretreatment. In this paper, Ga was used as the internal standard. The feasibility of rapid determination of multi-mass concentration gradient and the multi-element metal solution was explored by direct injectionTXRF method and then applied to the low mineral drinking water for the trace metal elements analysis. The experimental results showed that Al, K, Ca, Mn, Fe, Co, Ni, Cu, Zn and Sr can be analyzed immediately. However, the experiment results found that Al, K and Ca, as light elements, are difficult to achieve accurate quantification due to the recovery rate deviating from the standard value, the reason for the high matrix effect and low elements sensitivity. In contrast, other elements achieve the quantitative requirements. It was found that Mn, Fe, Co, Ni, Cu, Zn and Sr showed good accuracy and precision when the concentrations of metal elements were 40 mg center dot L (1), 4 mg center dot L (1), 0. 4 mg center dot L (1) and 40 mu g center dot L (1), respectively. The Recovery Rate (RR) was 80%similar to 112%. The relative Standard Deviation (RSD) was 3. 6 % similar to 10. 5 %, and the Detection Limit (DL) was 0. 001 similar to 0. 07 mg center dot L-1. With the decrease in the concentration gradient, the accuracy and precision appeared to have different degrees of decline. When the mass concentration was at the lowest level of 4 mu g center dot L (1) in this experiment, the RR and RSD of most elements (except Mn) significantly deviated from the standard value. This paper used the direct injection-TXRF method to test the RR of drinking mineral water at low, medium and high levels. The results showed that Mn, Fe, Co, Ni, Cu, Zn and Sr in the samples were basically at the concentration of mu g center dot L-1 levels, the average RR ranged from 90% to 110% and the average RSD was less than 12%, which met the qualification of micro estimation. In summary, Multi-element test results showed that TXRF is more suitable for heavy elements (Z>20) in selecting elements. Water samples with more than ten components of p_g " L (1) level can directly achieve rapid and accurate quantitative analysis without complex pretreatment for enrichment. Preconcentration techniques are needed to improve the accuracy of ultra-trace level samples in the environment.

Keyword :

Low mineral water Low mineral water Rapid Rapid Multi-element Analysis Multi-element Analysis Metal element Metal element TXRF TXRF

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GB/T 7714 Wu Lei , Li Ling-yun , Peng Yong-zhen . Rapid Determination of Trace Elements in Water by Total Reflection X-Ray Fluorescence Spectrometry Using Direct Sampling [J]. | SPECTROSCOPY AND SPECTRAL ANALYSIS , 2023 , 43 (3) : 990-996 .
MLA Wu Lei et al. "Rapid Determination of Trace Elements in Water by Total Reflection X-Ray Fluorescence Spectrometry Using Direct Sampling" . | SPECTROSCOPY AND SPECTRAL ANALYSIS 43 . 3 (2023) : 990-996 .
APA Wu Lei , Li Ling-yun , Peng Yong-zhen . Rapid Determination of Trace Elements in Water by Total Reflection X-Ray Fluorescence Spectrometry Using Direct Sampling . | SPECTROSCOPY AND SPECTRAL ANALYSIS , 2023 , 43 (3) , 990-996 .
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AOA系统厌氧时间和溶解氧对内源反硝化脱氮速率的影响
期刊论文 | 2023 , 43 (2) , 667-674 | 中国环境科学
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为了探索提升基于内源反硝化的厌氧/好氧/缺氧(Anaerobic/Oxic/Anoxic,AOA)工艺脱氮效率的方法,本研究分别考察了前置厌氧时间和好氧阶段溶解氧(DO)对内源反硝化脱氮速率的影响.结果表明:在进水COD浓度为155.1mg/L时,厌氧时间为60min,缺氧阶段内源反硝化速率(EDNR)最高;在不同的进水COD条件下,控制适当的厌氧时间,当内碳源中的聚羟基烷酸酯(PHAs)积累量达到峰值时,EDNR最高;EDNR受到好氧阶段DO过量或不足的影响,当DO控制为1mg/L时,EDNR最高.通过厌氧时间优化与DO控制可将EDNR分别提高31.7%,18.4%.本研究为AOA工艺提高后置缺氧阶段EDNR提供了可行策略,有利于AOA工艺设计与运行策略优化.

Keyword :

内源反硝化速率 内源反硝化速率 溶解氧 溶解氧 生物脱氮 生物脱氮 厌氧时间 厌氧时间

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GB/T 7714 安泽铭 , 丁静 , 高歆婕 et al. AOA系统厌氧时间和溶解氧对内源反硝化脱氮速率的影响 [J]. | 中国环境科学 , 2023 , 43 (2) : 667-674 .
MLA 安泽铭 et al. "AOA系统厌氧时间和溶解氧对内源反硝化脱氮速率的影响" . | 中国环境科学 43 . 2 (2023) : 667-674 .
APA 安泽铭 , 丁静 , 高歆婕 , 彭永臻 . AOA系统厌氧时间和溶解氧对内源反硝化脱氮速率的影响 . | 中国环境科学 , 2023 , 43 (2) , 667-674 .
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