The effectiveness of formic acid on partial nitrification in sequence batch reactor (SBR) is studied. In addition, the mechanism for achieving and maintaining stable partial nitrification by formic acid is also analyzed. The results of the long-term effect of formic acid on partial nitrification showed that when formic acid was not added, the effluent was primarily nitrate. After adding formic acid for 1 week, the partial nitrification operated stably, and the average ammonia conversion rate and nitrite accumulation rates were 99.25% and 89.41%, respectively, while the yield of nitrite was only 46.22%. After stopping formic acid dosing, the partial nitrification was maintained for ∼20 days, and during this period, the nitrite yield increased to 85.89%. The high-throughput analysis of the activated sludge samples showed that the ammonia oxidizing bacteria (AOB) Nitrosomonas and Sphingomonas only presented in the formic acid system. The denitrifiers Acidovorax, Bacillus, Comamonas, Flavobacterium, Lactococcus, Paracoccus, Terrimonas, and Thauera enriched when the formic acid was added. The long-term effect of formic acid on partial nitrification was consistent with the results of the molecular operating environment simulation analysis and the high-throughput sequencing analysis. Therefore, formic acid was considered to be responsible for the partial nitrification process in this study. By measuring the oxygen uptake rate, the activities of AOB and nitrite oxidizing bacteria (NOB) were analyzed, and the results indicated that formic acid dosing promoted AOB activity more than inhibiting NOB.
{"title":"Strategy for Rapid and Stable Operation of Nitritation Using Formic Acid As a Selective Inhibitor","authors":"Na Li, Suhan Yu, He Wang, Lanxin Liu, Guode Li","doi":"10.1089/ees.2021.0570","DOIUrl":"https://doi.org/10.1089/ees.2021.0570","url":null,"abstract":"The effectiveness of formic acid on partial nitrification in sequence batch reactor (SBR) is studied. In addition, the mechanism for achieving and maintaining stable partial nitrification by formic acid is also analyzed. The results of the long-term effect of formic acid on partial nitrification showed that when formic acid was not added, the effluent was primarily nitrate. After adding formic acid for 1 week, the partial nitrification operated stably, and the average ammonia conversion rate and nitrite accumulation rates were 99.25% and 89.41%, respectively, while the yield of nitrite was only 46.22%. After stopping formic acid dosing, the partial nitrification was maintained for ∼20 days, and during this period, the nitrite yield increased to 85.89%. The high-throughput analysis of the activated sludge samples showed that the ammonia oxidizing bacteria (AOB) <i>Nitrosomonas</i> and <i>Sphingomonas</i> only presented in the formic acid system. The denitrifiers <i>Acidovorax</i>, <i>Bacillus</i>, <i>Comamonas</i>, <i>Flavobacterium</i>, <i>Lactococcus</i>, <i>Paracoccus</i>, <i>Terrimonas</i>, and <i>Thauera</i> enriched when the formic acid was added. The long-term effect of formic acid on partial nitrification was consistent with the results of the molecular operating environment simulation analysis and the high-throughput sequencing analysis. Therefore, formic acid was considered to be responsible for the partial nitrification process in this study. By measuring the oxygen uptake rate, the activities of AOB and nitrite oxidizing bacteria (NOB) were analyzed, and the results indicated that formic acid dosing promoted AOB activity more than inhibiting NOB.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"6 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Measurements of atmospheric ammonia (NH3) concentrations were made at 28 sites on a landscape scale in Bretagne (north-western France) using passive diffusion ALPHA (adapted low-cost passive high adsorption) samplers. The measured ambient concentrations of NH3 vary typically between 2.03 and 105.17 NH3 μg/m3 within a few 100 m (∼700 m) from the emission sources. The interpretation of measurements was supported by simulations with the AERMOD model using a horizontal fine spatial resolution of 25 × 25 m2. Simulations were based on estimates of the NH3 emission calculated separately from livestock grazing, livestock housing, waste storage, land spreading, and mineral fertilizers in the area during the four seasons of 2008. Our findings show that AERMOD performance is acceptable for this experimental study with intensive livestock farming. However, the model still overestimates the observed NH3 concentrations over most of the area, which is well marked for cold seasons and low wind speeds; this overestimation could be more attributed to an overestimation of NH3 emissions in the model, source placements, passive sampler placements, and depletion/deposition processes, rather than roughness length and source height estimates.
{"title":"Measuring and Modeling Atmospheric Ammonia from Agricultural Sources at a Landscape Scale","authors":"Otmane Souhar, Yannick Fauvel, Chris Flechard","doi":"10.1089/ees.2021.0371","DOIUrl":"https://doi.org/10.1089/ees.2021.0371","url":null,"abstract":"Measurements of atmospheric ammonia (NH<sub>3</sub>) concentrations were made at 28 sites on a landscape scale in Bretagne (north-western France) using passive diffusion ALPHA (adapted low-cost passive high adsorption) samplers. The measured ambient concentrations of NH<sub>3</sub> vary typically between 2.03 and 105.17 NH<sub>3</sub> μg/m<sup>3</sup> within a few 100 m (∼700 m) from the emission sources. The interpretation of measurements was supported by simulations with the AERMOD model using a horizontal fine spatial resolution of 25 × 25 m<sup>2</sup>. Simulations were based on estimates of the NH<sub>3</sub> emission calculated separately from livestock grazing, livestock housing, waste storage, land spreading, and mineral fertilizers in the area during the four seasons of 2008. Our findings show that AERMOD performance is acceptable for this experimental study with intensive livestock farming. However, the model still overestimates the observed NH<sub>3</sub> concentrations over most of the area, which is well marked for cold seasons and low wind speeds; this overestimation could be more attributed to an overestimation of NH<sub>3</sub> emissions in the model, source placements, passive sampler placements, and depletion/deposition processes, rather than roughness length and source height estimates.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"28 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Identifying Metal Resistance Genes in Staphylococcus Species Isolated from Wastewater and Streams Receiving Treated Effluent","authors":"A. Amirsoleimani, G. Brion, P. François","doi":"10.1089/ees.2021.0358","DOIUrl":"https://doi.org/10.1089/ees.2021.0358","url":null,"abstract":"","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"27 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82301267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sustainability Assessment of Nanoscale Zerovalent Iron Production Methods","authors":"Caroline Visentin, A. Braun, A. Trentin, A. Thomé","doi":"10.1089/ees.2021.0341","DOIUrl":"https://doi.org/10.1089/ees.2021.0341","url":null,"abstract":"","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"10 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88838897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-07DOI: 10.1089/ees.2022.29003.cfp
C. Peters
{"title":"Call for Papers: Special Issue on Microbial and Chemical Processes in Natural and Engineered Systems","authors":"C. Peters","doi":"10.1089/ees.2022.29003.cfp","DOIUrl":"https://doi.org/10.1089/ees.2022.29003.cfp","url":null,"abstract":"","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"122 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90994116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Spatial–Temporal Changes and Influencing Factors of Surface Temperature in Urumqi City Based on Multi-Source Data","authors":"G. Ahmed, Mei Zan, A. Kasimu","doi":"10.1089/ees.2021.0556","DOIUrl":"https://doi.org/10.1089/ees.2021.0556","url":null,"abstract":"","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"18 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74125248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rusty J. Carvajal-Nigro, Jeannie M. Purchase, Kelsey J. Pieper, Adrienne Katner, Marc Edwards
Point-of-use household water filters (POU filters) are increasingly used to protect consumers from lead in drinking water, but there have been anecdotal reports of premature failure due to clogging when iron is present. To evaluate this concern in relation to lead removal and treatment costs, POU pitcher filters were exposed to water conditions containing lead and/or iron and tested to 100% of their rated capacity or until they clogged. Iron levels above the 0.3 mg/L Secondary Maximum Contaminant Level (SMCL) resulted in rapid clogging, affecting both treatment costs and consumer satisfaction. At 0.3 mg/L iron (Fe), half of the six POU filters tested clogged prematurely between 38% and 68% of the rated capacity. At 1.0 mg/L Fe, four out of six POU filters tested clogged prematurely, and all clogged prematurely at 20 mg/L.
{"title":"Iron Clogging of Lead-Certified Point-of-Use Pitcher Filters","authors":"Rusty J. Carvajal-Nigro, Jeannie M. Purchase, Kelsey J. Pieper, Adrienne Katner, Marc Edwards","doi":"10.1089/ees.2021.0331","DOIUrl":"https://doi.org/10.1089/ees.2021.0331","url":null,"abstract":"Point-of-use household water filters (POU filters) are increasingly used to protect consumers from lead in drinking water, but there have been anecdotal reports of premature failure due to clogging when iron is present. To evaluate this concern in relation to lead removal and treatment costs, POU pitcher filters were exposed to water conditions containing lead and/or iron and tested to 100% of their rated capacity or until they clogged. Iron levels above the 0.3 mg/L Secondary Maximum Contaminant Level (SMCL) resulted in rapid clogging, affecting both treatment costs and consumer satisfaction. At 0.3 mg/L iron (Fe), half of the six POU filters tested clogged prematurely between 38% and 68% of the rated capacity. At 1.0 mg/L Fe, four out of six POU filters tested clogged prematurely, and all clogged prematurely at 20 mg/L.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"51 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heavy metal pollution caused by the indiscriminate disposal of toxic heavy metal wastewater has become one of the serious water environmental issues. In this study, a novel NH2-PAA/Alginate hydrogel with double network interpenetrating structure was constructed with alginate, acrylic acid, and other raw materials. Characterized by scanning electron microscope, this hydrogel shows a three-dimensional porous structure, which would be useful in adsorption process for its high diffusion coefficient. The results of adsorption experimental show that the NH2-PAA/Alginate possessed the well adsorption capacity when pH was above 3.5, the maximum adsorption capacity calculated by Langmuir was 176.5 mg/g, and the adsorption equilibrium can be achieved within 150 min. In addition, the NH2-PAA/Alginate has good recycling ability and stability. The results of X-ray photoelectron spectroscope analysis reveal that the Cd(II) exchanged with Ca(II) and then coordinated with amino and hydroxyl groups in NH2-PAA/Alginate. The NH2-PAA/Alginate hydrogel can deal with all kinds of heavy metal ions and is a potential material for heavy metal adsorption.
{"title":"Cadmium(II) Capture Using Amino Functionalized Hydrogel with Double Network Interpenetrating Structure: Adsorption Behavior Study","authors":"Guiyin Zhou, Wenji Kang, Xin Huang, Sihua Liu, Haifei Wang, Jue Hu, Yue Li","doi":"10.1089/ees.2021.0328","DOIUrl":"https://doi.org/10.1089/ees.2021.0328","url":null,"abstract":"Heavy metal pollution caused by the indiscriminate disposal of toxic heavy metal wastewater has become one of the serious water environmental issues. In this study, a novel NH<sub>2</sub>-PAA/Alginate hydrogel with double network interpenetrating structure was constructed with alginate, acrylic acid, and other raw materials. Characterized by scanning electron microscope, this hydrogel shows a three-dimensional porous structure, which would be useful in adsorption process for its high diffusion coefficient. The results of adsorption experimental show that the NH<sub>2</sub>-PAA/Alginate possessed the well adsorption capacity when pH was above 3.5, the maximum adsorption capacity calculated by Langmuir was 176.5 mg/g, and the adsorption equilibrium can be achieved within 150 min. In addition, the NH<sub>2</sub>-PAA/Alginate has good recycling ability and stability. The results of X-ray photoelectron spectroscope analysis reveal that the Cd(II) exchanged with Ca(II) and then coordinated with amino and hydroxyl groups in NH<sub>2</sub>-PAA/Alginate. The NH<sub>2</sub>-PAA/Alginate hydrogel can deal with all kinds of heavy metal ions and is a potential material for heavy metal adsorption.","PeriodicalId":11777,"journal":{"name":"Environmental Engineering Science","volume":"5 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138529286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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