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Effect of internal recycle ratio on the denitrification process and nirS-containing bacteria of an anaerobic/anoxic/oxic (A²/O) wastewater treatment process 内循环比对厌氧/缺氧/氧(A²/O)废水处理过程中反硝化过程及含nirs细菌的影响
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/epe190306
Xungang Yan, Jia-xi Zheng, Yunping Han, Jianwei Liu, Jianhui Sun
{"title":"Effect of internal recycle ratio on the denitrification process and nirS-containing bacteria of an anaerobic/anoxic/oxic (A²/O) wastewater treatment process","authors":"Xungang Yan, Jia-xi Zheng, Yunping Han, Jianwei Liu, Jianhui Sun","doi":"10.37190/epe190306","DOIUrl":"https://doi.org/10.37190/epe190306","url":null,"abstract":"Internal recycle (IR) ratio is an important operation parameter for the anaerobic/anoxic/oxic (A2O) wastewater treatment process. Three laboratory-scale A2O wastewater treatment processes with IR ratios of 100%, 200%, and 300% were set up to study its influence on the denitrification process and nirS gene-containing bacteria. Results showed the removal rate of chemical oxygen demand (COD), ammonia nitrogen (NH4-N), total nitrogen (TN) and total phosphorus (TP) increased at different levels as the IR rate augmented from 100% to 300%. NirS gene numbers were increased from 1.8×108 to 3.2×108 copies/g MLSS, which was positively correlated with the denitrification rate in anoxic areas. Moreover, similarities were observed in the community structures of denitrifying bacteria that contained the nirS gene under different operation modes. These results indicated that increasing the IR rate in the A2O treatment process could benefit nirS gene-containing bacteria and improve denitrification ability observably while maintaining the stability of the community structure of the system.","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70005261","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}
引用次数: 0
Effectiveness of indicator bacteria removal in vertical flow filters filled with natural materials 天然材料填充垂直流过滤器去除指示菌的效果
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/epe190206
E. Wa̧sik, K. Chmielowski
{"title":"Effectiveness of indicator bacteria removal in vertical flow filters filled with natural materials","authors":"E. Wa̧sik, K. Chmielowski","doi":"10.37190/epe190206","DOIUrl":"https://doi.org/10.37190/epe190206","url":null,"abstract":"The effectiveness of removing indicator bacteria from domestic sewage using a vertical flow filter filled with natural materials has been analysed. The count of Escherichia coli and coliform bacteria was measured in raw and treated sewage and effectiveness of their removal under variable conditions of hydraulic load and depending on the filter filling (type, size and filling proportions) was assessed. A single-layer sand or zeolite filter was the most effective in reducing bacterial contamination. The sand-filled filter allowed the removal of 99.993–99.997% of Escherichia coli and the one filled with fine zeolite of 99.995%. The principal component analysis was used to comprehensively evaluate the filter performance. Three principal components were identified and they were responsible for 81% of raw data variability. The effectiveness of indicator bacteria removal depended mainly on the filling grain size and did not on filling proportions or its type.","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70005438","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}
引用次数: 5
Photocatalytic degradation of reactive dyes and real textile composite wastewater using TiO2/MWCNT nanocomposite under UVA and UVA-LED irradiation. A comparative study UVA和UVA- led照射下TiO2/MWCNT纳米复合材料光催化降解活性染料和真实纺织复合废水比较研究
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/EPE190207
D. S. Kumar, Kanmani Sellappa
{"title":"Photocatalytic degradation of reactive dyes and real textile composite wastewater using TiO2/MWCNT nanocomposite under UVA and UVA-LED irradiation. A comparative study","authors":"D. S. Kumar, Kanmani Sellappa","doi":"10.37190/EPE190207","DOIUrl":"https://doi.org/10.37190/EPE190207","url":null,"abstract":"Nano TiO2 and TiO2/MWCNT nanocomposite synthesized by the sol-gel method were characterized by XRD, BET, SEM, EDAX and FTIR techniques. These nanoparticles were used for photocatalytic decolorisation and degradation of three different reactive dyes such as Reactive Orange 16 (RO 16), Reactive Yellow 145 (RY 145) and Reactive Red 195 (RR 195) and real textile composite wastewater under the UVA and UVA-LED irradiation at room temperature. The maximum color removal of 96% and COD removal of 72% were achieved after 5 h in the presence of TiO2/MWCNT and H2O2 under UVA-LED irradiation. The kinetic studies obey pseudo-first order kinetics which is discussed in terms of the Langmuir–Hinshelwood kinetic model. The maximum degradation of 50% was achieved after 5 h in the presence of H2O2 using TiO2/MWCNT/UVA-LED for real textile composite wastewater. This study revealed that TiO2/MWCNT has improved the photocatalytic activity when compared to that of bare TiO2 under similar conditions. UVA-LED could be an alternative light source for the replacement of the conventional UV light for the photocatalytic treatment of reactive dyes.","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70005446","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}
引用次数: 3
Application of biological methods to assess the toxicity of soils contaminated with heavy metals and the effectiveness of stabilisation processes 应用生物方法评估重金属污染土壤的毒性和稳定过程的有效性
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/epe190403
Natalia Tatuśko-Krygier, M. Jakubus
{"title":"Application of biological methods to assess the toxicity of soils contaminated with heavy metals and the effectiveness of stabilisation processes","authors":"Natalia Tatuśko-Krygier, M. Jakubus","doi":"10.37190/epe190403","DOIUrl":"https://doi.org/10.37190/epe190403","url":null,"abstract":"Short-term biotests were used to determine the effectiveness of the use of compost and fly ash in the stabilization of heavy metals in contaminated soil. For this purpose, in two independent experiments, either compost (3:1) or fly ash (1:1) were added to soil contaminated with heavy metals. To assess seed germination and root elongation of Sorghum saccharatum L., Lepidium sativum L., Sinapis alba L. after three days a Phy-totoxkit test was used. Seedling emergence and biomass yield after 21 days were evaluated. Obtained data indicate better practical applicability of the seedling emergence test thanks to the longer duration resulting in more reliable conclusions provided in that test. A short, 3-day test did not confirm any effective stabilising role of theapplied additives. Sorghum saccharatum L. turned out to be most sensitive to the altered soil conditions, while Lepidium sativum L. was most tolerant.","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70005536","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}
引用次数: 1
Characteristic of mercury on the surface of ash originating from electrostatic precipitators of lignite and bituminous coal-fired power plants 褐煤和烟煤电厂静电除尘器烟尘表面汞的特征
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/epe190404
V. Veselý, Z. Szeliga, Z. Vávrová, B. Čech, P. Regucki, R. Krzyżyńska
{"title":"Characteristic of mercury on the surface of ash originating from electrostatic precipitators of lignite and bituminous coal-fired power plants","authors":"V. Veselý, Z. Szeliga, Z. Vávrová, B. Čech, P. Regucki, R. Krzyżyńska","doi":"10.37190/epe190404","DOIUrl":"https://doi.org/10.37190/epe190404","url":null,"abstract":"Mercury concentrations in ash taken from electrostatic precipitations (ESPs) installed in bituminous coal and lignite power plants have been analyzed by the X-ray fluorescence (XRF) method and leaching test supported by detailed coal and ash compositions’ analyses, surface scans and particles size distribution studies. The results showed that mercury was present on the surface of ash particles. Its concentration decreased upon increasing size of ash particles. Leaching tests showed that only small part of mercury was removed with water which suggests the fact that it occurred mostly in the form of insoluble compounds such as Hg, HgO, HgS and Hg2Cl2. There existed ash particles of the diameters from 50 to 60 μm, characterizing by the maximum capability to adsorb mercury and its compounds. The authors suggest that metals like copper and lead formed ash active centers that were preferably occupied by molecules containing atoms of mercury. It was highly possible to expect that content of these elements in ash would have a significant effect on sorption of mercury from combustion gases.","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70005550","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}
引用次数: 0
The effect of nitrate on fluoride removal by batch electrodialysis 硝酸盐对间歇电渗析除氟的影响
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/epe190407
A. Ahmed, Martyna Grzegorzek, K. Majewska-Nowak
{"title":"The effect of nitrate on fluoride removal by batch electrodialysis","authors":"A. Ahmed, Martyna Grzegorzek, K. Majewska-Nowak","doi":"10.37190/epe190407","DOIUrl":"https://doi.org/10.37190/epe190407","url":null,"abstract":"Fluoride and nitrate are common pollutants in drinking water and their presence deteriorates the quality of drinking water. According to WHO guidelines, the fluoride content in drinking water cannot be higher than 1.5 mg F – /dm 3 . The purpose of this paper was to evaluate the efficiency of fluoride removal from model aqueous solutions under the presence of nitrate. The experiments were conducted with the use of laboratory installation PCCell BED-1 System at a constant current density (0.78, 1.72, and 2.34 mA/cm 2 ) with the use of monovalent selective ion-exchange membranes. The influence of initial nitrate concentration (15, 30, 45 mg NO 3– /dm 3 ) and initial fluoride concentration (5, 10, 15 mg F – /dm 3 ) on the process performance was studied. The degree of desalination varied from 85 to 91.7% depending on the solution composition and the applied current density, whereas the fluoride removal was in the range of 70–90%. The presence of coexisting NO 3– ions in fluoride solutions improved process efficiency in view of fluoride removal by batch electrodialysis.","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70005633","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}
引用次数: 2
Activated carbon adsorption behaviour of toluene at various temperatures and relative humidity 不同温度和相对湿度下活性炭对甲苯的吸附行为
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/epe190109
Adnan Görgülü, Hüseyin Yağlı, Yıldız Koç, A. Koç, E. Baltacioǧlu
{"title":"Activated carbon adsorption behaviour of toluene at various temperatures and relative humidity","authors":"Adnan Görgülü, Hüseyin Yağlı, Yıldız Koç, A. Koç, E. Baltacioǧlu","doi":"10.37190/epe190109","DOIUrl":"https://doi.org/10.37190/epe190109","url":null,"abstract":"","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70004960","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}
引用次数: 10
Analysis of legal and technical solutions in terms of odours in Poland 分析波兰有关气味的法律和技术解决方案
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/EPE190110
I. Sówka, U. Miller, L. Karski
{"title":"Analysis of legal and technical solutions in terms of odours in Poland","authors":"I. Sówka, U. Miller, L. Karski","doi":"10.37190/EPE190110","DOIUrl":"https://doi.org/10.37190/EPE190110","url":null,"abstract":"Despite solutions available in the Polish law system which could be used in conflictual situations connected with odour emission, the amount of odour complaints in Poland has been increasing. Currently applied legal solutions in Poland used in private-law and public-law ways in odour issues have been characterised. The results of analyses of available and developed technical solutions aiming to eliminate odour nuisance have been presented as well. Additionally, the results of research conducted in laboratory conditions and in chosen municipal waste management and industry facilities have been displayed. A conducted analysis pointed out the limited character of Polish legal solutions concerning odours. Therefore, the need to create an administrative and legal regulation dedicated directly to the preventing odour nuisance in Poland was emphasized. Such a regulation should include issues concerning, inter alia, emission, immision and technological standards.","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70004968","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}
引用次数: 2
Testing properties of sewage sludge for energy use 用于能源利用的污水污泥的性能试验
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/epe190405
K. Król, K. Iskra, W. Ferens, Jan M. Miodoński
{"title":"Testing properties of sewage sludge for energy use","authors":"K. Król, K. Iskra, W. Ferens, Jan M. Miodoński","doi":"10.37190/epe190405","DOIUrl":"https://doi.org/10.37190/epe190405","url":null,"abstract":"The properties of sewage sludge in the context of their further energy use have been examined. For this purpose, 34 samples of sewage sludge from municipal sewage treatment plants from the area of Lower Silesia with a capacity higher than the 2000 population equivalent (PE) with separate sludge management were tested. As part of the study, tests were made to determine the technological useful-ness of fuels and their elemental composition, i.e., technical analyses and elemental analyses. The obtained results show a large diversity of basic physicochemical properties of the tested sewage sludge. The share of volatile components important for energetic use ranged from 38.4 to 59.8 wt. %. The content of carbon (C) in the mass of tested sewage sludge ranged from 22.4 to 39.2 wt. %, which means that they have a lower content of elemental carbon compared to solid fuels. The higher heating value ( HHV ) of sewage sludge ranged from 9.3 to 17.4 MJ/kg dry mass.","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70005588","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}
引用次数: 3
Growth and heavy metals uptake by Vicia faba in mining soil and tolerance of its symbiotic rhizobacteria 蚕豆在矿区土壤中的生长、重金属吸收及其共生根瘤菌的耐受性
IF 0.6 4区 环境科学与生态学
Environment Protection Engineering Pub Date : 2019-01-01 DOI: 10.37190/epe190107
A. E. Alaoui, N. Bechtaoui, Loubna Benidire, A. E. Gharmali, W. Achouak, K. Daoui, B. Imziln, K. Oufdou
{"title":"Growth and heavy metals uptake by Vicia faba in mining soil and tolerance of its symbiotic rhizobacteria","authors":"A. E. Alaoui, N. Bechtaoui, Loubna Benidire, A. E. Gharmali, W. Achouak, K. Daoui, B. Imziln, K. Oufdou","doi":"10.37190/epe190107","DOIUrl":"https://doi.org/10.37190/epe190107","url":null,"abstract":"Faba bean plants in the 1/8 mixture with soil had the ability to accumulate Pb, Zn and Cu. 95% of the absorbed Pb were in the roots, and Cu and Zn were found in the shoots by 35% and 45%, respec-tively. There was a decrease in the root hairs and the number of cell layers of the root cortex alongside epidermis lesions. From the 50 tested rhizobacterial strains, 20 were able to grow at 150 mg/dm 3 of Pb, 6 were resistant to 150 mg/dm 3 of Zn and 8 resisted to 20 mg/dm 3 of Cu. Best four strains had adsorp-tion potentials and the biosorption was higher for Cu. These strains were capable of producing auxin and exopolysaccharides. The most tolerant strains (FD1 and FD2) isolated near the mining site produced siderophores and high amounts of exopolysaccharides. The use of such strains and V. faba could be of important biotechnological value in decreasing heavy metal pollution of mining soils. _________________________","PeriodicalId":11709,"journal":{"name":"Environment Protection Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70004899","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}
引用次数: 8
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