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学者姓名:彭永臻
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摘要 :
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.
关键词 :
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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摘要 :
The application of partial nitritation-anammox (PNA) process suffers severe obstacles due to the instability of partial nitritation (PN) process. This study sought to evaluate the feasibility of endogenous partial denitratation (EPD) as a remediation or alternative to supply nitrite for the unstable PNA process. A novel strategy of optimal organics utilization through pre-anaerobic carbon storage and post-anoxic endogenous denitrification coupled with anammox was developed in a single-stage bioreactor treating actual municipal wastewater with low C/N (similar to 3.2). Specifically, the undesired NO2-/NH4+ ratio (2.4 to 0.04) and nitrate accumulation were obtained by increasing the aeration rate (0.6 to 1.8 L/min) to simulate the PN instability. Delightedly, advanced nitrogen removal efficiency (92.1%) was maintained despite a dramatic decrease in nitrite accumulation ratio from 97.6% to 2.6%. This was attributed to the significant increase in anammox contribution to total nitrogen removal from 30.2% to 80.5%. The steady nitrite flux supplied from EPD coupled with PN (EPD contribution increased from 0 to 97.0%) was assumed to be the main reason for the continually increasing abundance and bioactivity of anammox bacteria. Both the anammox bacteria (1.5%, Ca. Brocadia) and glycogen accumulating organisms (6.0%, responsible for EPD) were enriched and coexisted stably in the single reactor. Our study confirms that coupling EPD with anammox has great potential as a remediation for the unstable mainstream PNA process.
关键词 :
Municipal wastewater Municipal wastewater Endogenous partial denitratation Endogenous partial denitratation Mainstream anammox Mainstream anammox Nutrient removal Nutrient removal Partial nitritation Partial nitritation
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GB/T 7714 | Dan, Qiongpeng , Du, Rui , Wang, Tong et al. Endogenous partial denitritation as an efficient remediation to unstable partial nitritation-anammox (PNA) process: Bacteria enrichment and superior robustness [J]. | CHEMICAL ENGINEERING JOURNAL , 2023 , 454 . |
MLA | Dan, Qiongpeng et al. "Endogenous partial denitritation as an efficient remediation to unstable partial nitritation-anammox (PNA) process: Bacteria enrichment and superior robustness" . | CHEMICAL ENGINEERING JOURNAL 454 (2023) . |
APA | Dan, Qiongpeng , Du, Rui , Wang, Tong , Sun, Tiantian , Li, Xiyao , Zhang, Qiong et al. Endogenous partial denitritation as an efficient remediation to unstable partial nitritation-anammox (PNA) process: Bacteria enrichment and superior robustness . | CHEMICAL ENGINEERING JOURNAL , 2023 , 454 . |
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摘要 :
A novel double-anammox process for advanced mainstream nitrogen removal was established using step-feed sequencing batch reactor (SBR) system with integration of suspend sludge and biofilms. Following optimization of influent distribution ratio, the effluent total inorganic nitrogen (TIN) was < 10.2 mg N/L, with influent TIN of 43.4 mg N/L, and anammox contributed 71.4% to TIN removal. Biological processes and batch tests revealed that gradient C/N reduction promoted denitratation/anammox in anoxic stage, and simultaneous nitritation and anammox were achieved in oxic stage. Specially, anammox maintained on biofilms with abundance over 109 copies/ (g dry sludge). High-throughput sequencing revealed that Thauera and Nitrosomonas were enriched in flocs. Furthermore, metagenomic sequencing confirmed that Thauera owns narG and napA (NO3--> NO2-) and Nitrosomonas owns amoA (NH4+-> NO2-), support stable NO2- supply for double-anammox. This mainstream anammox-dominant process could potentially be used for stable nitrogen removal in municipal wastewater treatment plants.
关键词 :
Anammox Anammox Denitratation Denitratation Municipal wastewater Municipal wastewater Nitritation Nitritation Step-feed sequencing batch reactor Step-feed sequencing batch reactor
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GB/T 7714 | Li, Wenyu , Li, Jianwei , Liu, Ying et al. Mainstream double-anammox driven by nitritation and denitratation using a one-stage step-feed bioreactor with real municipal wastewater [J]. | BIORESOURCE TECHNOLOGY , 2022 , 343 . |
MLA | Li, Wenyu et al. "Mainstream double-anammox driven by nitritation and denitratation using a one-stage step-feed bioreactor with real municipal wastewater" . | BIORESOURCE TECHNOLOGY 343 (2022) . |
APA | Li, Wenyu , Li, Jianwei , Liu, Ying , Gao, Ruitao , Deng, Liyan , Kao, Chengkun et al. Mainstream double-anammox driven by nitritation and denitratation using a one-stage step-feed bioreactor with real municipal wastewater . | BIORESOURCE TECHNOLOGY , 2022 , 343 . |
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摘要 :
Partial nitrification and partial denitrification combined with anammox is a promising process for sewage treatment. In this study, real municipal wastewater was treated in a continuous two-stage anoxic/oxic (A/O) reactor. External mixed sludge fermentation products were added in the anoxic zone, simultaneously achieving partial nitrification and partial denitrification and achieving a high and relatively stable accumulation of nitrite. The maximum accumulation rates of NO2--N in A1.2 and A2.1-A2.4 zones of the reactor reached 70% and 61%- 37%, respectively, which improved denitrification efficiency and created conditions that supported the coupling of subsequent anammox. The influent nitrogen load of the system was 0.078 kg/(m(3)center dot d), and the mean influent and effluent total nitrogen were 51 and 12 mg/L, respectively. The mean total nitrogen removal rate reached 76%. Further analysis revealed that Hyphomicrobium (incomplete denitrifiers) and Nitrosomonas (ammonia oxidizing bacteria) were enriched, which may have facilitated the high nitrite accumulation. Moreover, the batch test showed that adding sludge fermentation during denitrification significantly suppressed nitrite reduction, resulting in the nitrite accumulation.
关键词 :
Anammox Anammox Nitrite accumulation Nitrite accumulation Partial denitrification Partial denitrification Sludge fermentation products Sludge fermentation products
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GB/T 7714 | Chen, Yao , Zhang, Ying , Zhang, Liang et al. Applicability of two-stage anoxic/oxic shortcut nitrogen removal via partial nitrification and partial denitrification for municipal wastewater by adding sludge fermentation products continuously [J]. | CHEMOSPHERE , 2022 , 287 . |
MLA | Chen, Yao et al. "Applicability of two-stage anoxic/oxic shortcut nitrogen removal via partial nitrification and partial denitrification for municipal wastewater by adding sludge fermentation products continuously" . | CHEMOSPHERE 287 (2022) . |
APA | Chen, Yao , Zhang, Ying , Zhang, Liang , Zhang, Shujun , Peng, Yongzhen . Applicability of two-stage anoxic/oxic shortcut nitrogen removal via partial nitrification and partial denitrification for municipal wastewater by adding sludge fermentation products continuously . | CHEMOSPHERE , 2022 , 287 . |
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摘要 :
The slow initiation of anammox for treating typical domestic wastewater and the relatively high footprint of wastewater treatment infrastructures are major concerns for practical wastewater treatment systems. Herein, a 300 m(3)/d hybrid biofilm reactor (HBR) process was developed and operated with a short hydraulic retention time (HRT) of 8 h. The analysis of the bacterial community demonstrated that anammox were enriched in the anoxic zone of the HBR process. The percentage abundance of Candidatus Brocadia in the total bacterial community of the anoxic zone increased from 0 at Day 1 to 0.33% at Day 130 and then to 2.89% at Day 213. Based upon the activity of anammox bacteria, the removal of ammonia nitrogen (NH4+-N) in the anoxic zone was approximately 15%. This showed that the nitrogen transformation pathway was enhanced in the HBR system through partial anammox process in the anoxic zone. The final effluent contained 12 mg/L chemical oxygen demand (COD), 0.662 mg/L NH4+-N, 7.2 mg/L total nitrogen (TN), and 6 mg/L SS, indicating the effectiveness of the HBR process for treating real domestic wastewater.
关键词 :
Anammox Anammox Biofilm Biofilm Candidatus Brocadia Candidatus Brocadia Domestic wastewater Domestic wastewater Full scale Full scale
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GB/T 7714 | Hou, Feng , Zhang, Ting , Peng, Yongzhen et al. Partial anammox achieved in full scale biofilm process for typical domestic wastewater treatment [J]. | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING , 2022 , 16 (3) . |
MLA | Hou, Feng et al. "Partial anammox achieved in full scale biofilm process for typical domestic wastewater treatment" . | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 16 . 3 (2022) . |
APA | Hou, Feng , Zhang, Ting , Peng, Yongzhen , Cao, Xiaoxin , Pang, Hongtao , Shao, Yanqing et al. Partial anammox achieved in full scale biofilm process for typical domestic wastewater treatment . | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING , 2022 , 16 (3) . |
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摘要 :
Anammox is sensitive to temperature, which can limit its practical application in wastewater treatment. In this study, a step-feed anoxic-oxic (A/O) process coupled with PD/A was operated steadily from 26.8 degrees C to 13.1 degrees C for wastewater treatment for 200 days. The effluent total inorganic nitrogen (TIN) and phosphorus concentrations were 10.2 mg/L and 0.29 mg/L at C/N ratio of 4.6 and 15.0 degrees C even with increasing nitrogen loading rate (NLR). The anammox activity was 5.60 mg NH4+-N/gMLSS/d even at 14 degrees C, moreover, anammox abundance on the biocarriers increased with decreasing temperature. It was observed that the effect of partial denitrification (PD) was enhanced under low temperature, thus the contribution of anammox for nitrogen removal was improved. The pathway of anammox for nitrogen removal accounted for 48% and the effect of effluent did not deteriorate under low temperature. This study states that PD/A has advantages under low temperature operation, which is suitable for treatment of wastewater with low C/N ratio. (C) 2021 Elsevier B.V. All rights reserved.
关键词 :
Actual sewage Actual sewage Anammox Anammox Low temperature Low temperature Mainstream Mainstream Nitrogen and phosphorus removal Nitrogen and phosphorus removal Partial denitrification Partial denitrification
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GB/T 7714 | Gao, Ruitao , Peng, Yongzhen , Li, Jianwei et al. Mainstream partial denitrification-anammox (PD/A) for municipal sewage treatment from moderate to low temperature: Reactor performance and bacterial structure [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2022 , 806 . |
MLA | Gao, Ruitao et al. "Mainstream partial denitrification-anammox (PD/A) for municipal sewage treatment from moderate to low temperature: Reactor performance and bacterial structure" . | SCIENCE OF THE TOTAL ENVIRONMENT 806 (2022) . |
APA | Gao, Ruitao , Peng, Yongzhen , Li, Jianwei , Liu, Ying , Deng, Liyan , Li, Wenyu et al. Mainstream partial denitrification-anammox (PD/A) for municipal sewage treatment from moderate to low temperature: Reactor performance and bacterial structure . | SCIENCE OF THE TOTAL ENVIRONMENT , 2022 , 806 . |
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摘要 :
The start-up, efficient, and secure operation of Anammox treating low ammonia sewage, is an important research focus. In this study, a partial nitrification-denitrification coupled with simultaneous Anammox and denitrifi-cation (PND-SAD) process was achieved in sequencing batch reactor/up-flow anaerobic sludge bed (SBR-UASB). The key measures to maintain high efficiency PND were: (i) controlling dissolved oxygen in the SBR below 0.5 mg/L, which is not only conducive to PN, but also promotes the contribution of simultaneous nitrification and denitrification to nitrogen removal; (ii) monitoring the nitrate (NO3--N) of SBR effluent and discharging sludge to wash out nitrate oxidation bacteria when the NO3--N exceeds 1.0 mg/L. The nitrite accumulation rate reached 97.6%. SBR effluent and domestic sewage entered the UASB. Although Candidatus Brocadia only accounted for 0.8%, its contribution to nitrogen removal reached 76.8%. In PND-SAD system, the aerobic HRT was only 3.8 h, nitrogen removal efficiency up to 97.3%.
关键词 :
Anammox Anammox Deep denitrification Deep denitrification Domestic sewage Domestic sewage Partialnitrification-denitrification (PND) Partialnitrification-denitrification (PND)
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GB/T 7714 | Zhao, Yueru , Zhang, Qiong , Peng, Yi et al. Advanced nitrogen elimination from domestic sewage through two stage partial nitrification and denitrification (PND) coupled with simultaneous anaerobic ammonia oxidation and denitrification (SAD) [J]. | BIORESOURCE TECHNOLOGY , 2022 , 343 . |
MLA | Zhao, Yueru et al. "Advanced nitrogen elimination from domestic sewage through two stage partial nitrification and denitrification (PND) coupled with simultaneous anaerobic ammonia oxidation and denitrification (SAD)" . | BIORESOURCE TECHNOLOGY 343 (2022) . |
APA | Zhao, Yueru , Zhang, Qiong , Peng, Yi , Peng, Yongzhen , Li, Xiyao , Jiang, Hao . Advanced nitrogen elimination from domestic sewage through two stage partial nitrification and denitrification (PND) coupled with simultaneous anaerobic ammonia oxidation and denitrification (SAD) . | BIORESOURCE TECHNOLOGY , 2022 , 343 . |
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摘要 :
Developing metal-organic framework-incorporated carbon heterostructure (MOF@C) adsorbents with advanced phosphate removal capability is of remarkable significance in satisfying the increasingly stringent wastewater discharge criteria. Nevertheless, the tailored synthesis of MOF@C architectures and related structureperformance modulation remains elusive to date. Herein, we report on the dimensional engineering of MOF@C to prepare ZIF8@single-walled carbon nanotube (SCNT) and ZIF8@reduced graphene oxide (rGO) heterostructures with satisfactory phosphate removal efficiency. The maximum phosphate adsorption capacity of ZIF8@rGO is 491.2 mg g(-1), with the largest partition coefficient value of 1900 mg g(-1) mu M-1 and an initial concentration of 2 mg L-1 under a neutral condition; thus, the prepared heterostructures evidently surpass stateof-the-art adsorbents. The high adsorption capacity is attributable to the two-dimensional graphene support, which provides a more effective surface area for ZIF8 anchoring than that of one-dimensional CNT. Furthermore, phosphate removal on these dimension-engineered MOF@C is examined as a function of pH, system temperature, and coexisting anions. The underlying mechanism is further elucidated via X-ray photoelectron spectroscopy/Xray diffraction analysis and density functional theoretical simulation; enhanced phosphate removal by ZIF8@rGO is mainly attributable to the ligand exchange between the phosphates and the adsorbent. Our findings can aid the design of multifunctional MOF@C adsorbents for efficient phosphate removal from contaminated waterbodies.
关键词 :
Adsorption Adsorption heterostructure heterostructure Ligand exchange Ligand exchange Phosphate removal Phosphate removal Metal-organic framework-incorporated carbon Metal-organic framework-incorporated carbon
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GB/T 7714 | Shang, Yaxin , Xu, Qing , Gao, Zhixiao et al. Enhanced phosphate removal from practical wastewater via in situ assembled dimension-engineered MOF@carbon heterostructures [J]. | CHEMICAL ENGINEERING JOURNAL , 2022 , 428 . |
MLA | Shang, Yaxin et al. "Enhanced phosphate removal from practical wastewater via in situ assembled dimension-engineered MOF@carbon heterostructures" . | CHEMICAL ENGINEERING JOURNAL 428 (2022) . |
APA | Shang, Yaxin , Xu, Qing , Gao, Zhixiao , Li, Beibei , Yang, Jingsu , Wang, Yifei et al. Enhanced phosphate removal from practical wastewater via in situ assembled dimension-engineered MOF@carbon heterostructures . | CHEMICAL ENGINEERING JOURNAL , 2022 , 428 . |
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摘要 :
Simultaneous partial nitrification, biological phosphorous removal and sludge fermentation in continuous-flow system faced many challenges in wastewater treatment plants (WWTPs). In this study, a novel process was developed to achieve partial nitrification, enhanced biological phosphorus removal and in-situ fermentation (PNPRF) in continuous-flow system dominated by Tetrasphaera treating low carbon/nitrogen ratio (COD/N) real domestic wastewater. After 80 days of operation, no external carbon was added into the influent. Nitrite accumulation ratio (NAR) reached 99.4% and removal efficiency of PO43- -P was 100%. The effluent concentration of total inorganic nitrogen (TIN) was lower than 2 mg/L. Compared with traditional biological nitrogen and phosphorus removal processes, the daily sludge discharge in continuous-flow PNPRF decreased by 61.9%. DNA concentration of the sludge supernatant after anaerobic zone was 2.26-fold of that before anaerobic zone, and percentages of intact cells decreased by 6.9% and necrotic cells increased by 8.3%, indicating that cell lysis caused the reduction of sludge discharge. The negative effect of prolonged anaerobic phase on transcriptional response of nxrB gene was more significant than that of amoA and hao gene, which resulted in stable partial nitrification. The activities of ammonium-oxidizing bacteria (AOB) were higher than that of nitrite-oxidizing bacteria (NOB), and reverse transcriptional PCR (RT-PCR) showed that RNA expression of AOB was higher than that of NOB. Achieving partial nitrification, enhanced biological phosphorus removal and in-situ fermentation in continuous-flow system dominated by Tetrasphaera solved the problems of carbon source deficiency and large amount of sludge discharge in treating real domestic wastewater process.
关键词 :
Continuous flow Continuous flow Enhanced biological phosphorus removal Enhanced biological phosphorus removal Partial nitrification Partial nitrification Real domestic wastewater Real domestic wastewater Transcriptional level Transcriptional level
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GB/T 7714 | Fan, Zhiwei , Zeng, Wei , Meng, Qingan et al. Achieving partial nitrification, enhanced biological phosphorus removal and in-situ fermentation (PNPRF) in continuous-flow system and mechanism analysis at transcriptional level [J]. | CHEMICAL ENGINEERING JOURNAL , 2022 , 428 . |
MLA | Fan, Zhiwei et al. "Achieving partial nitrification, enhanced biological phosphorus removal and in-situ fermentation (PNPRF) in continuous-flow system and mechanism analysis at transcriptional level" . | CHEMICAL ENGINEERING JOURNAL 428 (2022) . |
APA | Fan, Zhiwei , Zeng, Wei , Meng, Qingan , Liu, Hong , Ma, Chenyang , Peng, Yongzhen . Achieving partial nitrification, enhanced biological phosphorus removal and in-situ fermentation (PNPRF) in continuous-flow system and mechanism analysis at transcriptional level . | CHEMICAL ENGINEERING JOURNAL , 2022 , 428 . |
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摘要 :
It is a challenging subject to realize nitrogen and phosphorus elimination synchronously from limited-carbon sewage through conventional biological processes. Herein, a novel continuous flow anaerobic/oxic/anoxic/ oxic (AOA-O) process, which integrated denitrifying dephosphatation, endogenous denitrification and anammox in the anoxic zone, was developed to enhance nutrient elimination from low carbon/nitrogen sewage (3.4 in average). After the long-term operation (280 days), a satisfactory nutrient removal performance (effluent PO43-- P: 0.2 mg P/L, total inorganic nitrogen (TIN):8.9 mg N/L) was obtained. Mass balance indicated that anammox contributed to 26.1% TIN removal and denitrifying dephosphatation contributed to 25.6% phosphorus removal, respectively. The cooperation of anammox bacteria retained in biofilms and endogenous denitrifying bacteria in flocculent sludge was responsible for the enhanced nutrient removal in the anoxic zone. Dechloromonas carried out phosphorus uptake both under oxic conditions and anoxic conditions. This study can broaden the application prospect of mainstream anammox.
关键词 :
Mainstream anammox Mainstream anammox Denitrifying dephosphatation Denitrifying dephosphatation Endogenous denitrification Endogenous denitrification Continuous flow Continuous flow
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GB/T 7714 | Feng, Yan , Luo, Shaoping , Zhang, Yingxin et al. Enhanced nutrient removal from mainstream sewage via denitrifying dephosphatation, endogenous denitrification and anammox in a novel continuous flow process [J]. | BIORESOURCE TECHNOLOGY , 2022 , 351 . |
MLA | Feng, Yan et al. "Enhanced nutrient removal from mainstream sewage via denitrifying dephosphatation, endogenous denitrification and anammox in a novel continuous flow process" . | BIORESOURCE TECHNOLOGY 351 (2022) . |
APA | Feng, Yan , Luo, Shaoping , Zhang, Yingxin , Wang, Shuying , Peng, Yongzhen . Enhanced nutrient removal from mainstream sewage via denitrifying dephosphatation, endogenous denitrification and anammox in a novel continuous flow process . | BIORESOURCE TECHNOLOGY , 2022 , 351 . |
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