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Occurrence and Roles of Comammox Bacteria in Water and Wastewater Treatment Systems:A Critical Review

Engineering 2022年第10期17卷 196-206页

作者： naga raju maddela Zhihao Gan Yabing Meng Fuqiang Fan Fangang Meng School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou 510006China Departamento de Ciencias Biológicas Facultad de Ciencias de la SaludUniversidad Técnica de ManabíPortoviejo 130105Ecuador Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Guangzhou 510006China

Nitrogen removal is a critical process in water treatment plants(WIPs)and wastewater treatment plants(WWTPs).The recent discovery of a novel bacterial process,complete ammonia oxidation(comammox,CMX),has refuted a century-long perception of the two-step conversion of NH3to NO3-.Compared with canonical nitrifiers,CMX bacteria offer undeniable advantages,such as a high growth yield propensity and adaptability to nutrient-and growth-limiting conditions,which collectively draw attention to validate the aptness of CMX bacteria to wastewater *** there has been no comprehensive review on the relevance of CMX bacteria for sustainable water and wastewater treatment,this review is intended to discuss the roles and applications of CMX in the removal of nitrogen and pollutants from water and *** took into account insights into the metabolic versatilities of CMX bacteria at the clade and subclade *** focused on the distribution of CMX bacteria in engineered systems,niche differentiation,co-occurrence and interactions with cano nical nitrifiers for a better understanding of CMX bacteria in terms of their *** details on the reactor adaptability and stress response of CMX bacteria are *** potential of CMX bacteria to degrade micropollutants either directly or co-metabolically was evaluated,and these insights would be an indispensable advantage in opening the doors for wider applications of CMX bacteria in ***,we summarized future directions of research that are imperative in improving the understanding of CMX biology.

关键词： Comammox bacteria Wastewater treatment Nitrogen removal Micropollutant degradation Reactor operation

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Evidence on antimicrobial activity of essential oils and herbal extracts against Yersinia enterocolitica - A review

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Food Bioscience 2022年第3期47卷 132-144页

作者： Andrea Durofil naga raju maddela Reinier Abreu Naranjo Matteo Radice Area de Botánica Del Departamento de Biología y Producción de los Vegetales Facultad de CienciasUniversidad de ExtremaduraBadajozSpain Departamento de Ciencias Biológicas Facultad la Ciencias de la SaludUniversidad Técnica de ManabíPortoviejoEcuador Instituto de Investigación Universidad Técnica de ManabíPortoviejoEcuador Universidad Estatal Amazónica Km 2 ½ Vía Puyo-TenaPuyoEcuador

Yersinia enterocolitica is a very common food-borne pathogen which causes gastrointestinal infections (yersiniosis) in humans and a wide array of animals (***,deer,pigs,and birds).Due to the increasing interest in innovative plant-based substances as common food preservatives,several essential oils and herbal extracts have been investigated deeply that resulted in the emergence of novel anti-Yersinia *** reviewed relevant work done by 53 researchers covering literature from the year 2002 to till *** species such as Origanum vulgare ,Rosmarinus officinalis ,Thymus vulgaris ,Ocimum basilicum have been extensively investigated and identified that 1,8-cineole,linalool and γ-terpinene as compounds found in the essential oils of these plants have anti-Yersinia activity active food packaging *** the same direction,some promising results have been mentioned about the herbal extracts of Murrya koenigii ,Tanacetum vulgare and Tanacetum balsamita,but further investigations are needed for their sustainable *** to hierarchical cluster analysis,we found that Lamiaceae and Lauracea as the most significant families with anti-Yersinia *** the end,we proposed new research trends in order to enhance a global knowledge about the use of natural products against *** .

关键词： Food-borne pathogens Plant-based alternatives Food preservation Active packaging

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Selective elimination of chromophoric and fluorescent dissolved organic matter in a full-scale municipal wastewater treatment plant

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Journal of Environmental Sciences 2017年第7期29卷 150-161页

作者： Xiaofang Yang Zhongbo Zhou maddela naga raju Xiaoxuan Cai Fangang Meng School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Guangzhou 510275China Lijiao Wastewater Treatment Plant Cuangzhou 510275China

Effluent organic matter（Ef OM） from municipal wastewater treatment plants potentially has a detrimental effect on both aquatic organisms and *** study evaluated the removal and transformation of chromophoric dissolved organic matter（CDOM） and fluorescent dissolved organic matter（FDOM） in a full-scale wastewater treatment plant under different *** results showed that bio-treatment was found to be more efficient in removing bulk DOM（in term of dissolved organic carbon,DOC） than CDOM and FDOM,which was contrary to the disinfection *** and FDOM were selectively removed at various stages during the ***,the low molecular weight fractions of CDOM and protein-like FDOM were more efficiently removed during bio-treatment process,whereas the humic-like FDOM exhibited comparable decreases in both bio-treatment and disinfection ***,the performance of the WWTP was weak in terms of CDOM and FDOM removal,resulting in enrichment of CDOM and FDOM in ***,the total removal of the bulk DOM（P 〈 0.05） and the protein-like FDOM（P 〈 0.05） displayed a significant seasonal variation,with higher removal efficiencies in summer,whereas removal of CDOM and the humic-like FDOM showed little differences between summer and *** all,the results provide useful information for understanding the fate and transformation of DOM,illustrating that sub-fractions of DOM could be selectively removed depending on treatment processes and seasonality.

关键词： Municipal wastewater Dissolved organic matter EEM spectroscopy UV–vis absorbance Process dependency

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CeCl_3·7H_2O-SiO_2:Catalyst promoted microwave assisted neat synthesis,antifungal and antioxidant activities of α-diaminophosphonates

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Chinese Chemical Letters 2013年第8期24卷 759-763页

作者： Subba Rao Devineni Srinivasulu Doddaga Rajasekhar Donka naga raju Chamarthi Department of Chemistry Sri Venkateswara University

CeCl_3·7H_2O supported on silica（CeCl_3·7H_2O-SiO_2） is used as a heterogeneous,efficient and recyclable catalyst for a three component one-pot reaction of an amine,aldehydes and diethyl phosphite to synthesizeα-diaminophosphonate derivatives under microwave irradiation exploiting neat reaction ***α-diaminophosphonates（6a-j） of 4,4＇-sulfonyldianiline（Dapsone）（3） were synthesized and structural elucidation was confirmed by spectral *** and antioxidant activities were evaluated include minimum inhibitory concentrations and IC_（50） values,respectively of the titled *** 6h,6i exhibited promising antioxidant activity at lower IC_（50） values 53.7μg/mL, 53.2μg/mL,respectively as compared with standard IC_（50） value 51.6μg/mL.

关键词： α-Diaminophosphonates Green synthesis Kabachnik-Fields reaction Antifungal activity Antioxidant activity

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Nickel and aluminium recovery from spent reforming catalyst through selective leaching,crystallization and precipitation

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Transactions of Nonferrous Metals Society of China 2022年第1期32卷 345-353页

作者： naga raju BATTI N.R.MANDRE Department of QC&SSP Audit Projects&Development India Limited(Govt.of India U/T)PDIL BhawanA-14Sector-1NoidaGautam Buddh NagarU.P–201301India Department of Fuel Minerals and Metallurgical EngineeringIndian Institute of Technology(Indian School of Mines)DhanbadJharkhand–826004India

An attempt has been made to investigate and optimize the recovery of Ni and Al through sulphuric acid(3.0-5.5 mol/L)leaching under different operating *** the leaching experiments,it was possible to extract 98.5%of NiO and 40.7%of Al_(2)O_(3)under the conditions of 5.5 mol/L H_(2)SO_(4),reaction time of 4 h,solid-to-liquid ratio 0.2 g/mL,temperature of 358 K,particle size<100μm,200-250 r/min with 5.0 g catalyst *** leached liquor Al was separated by selective crystallization using 1.4 mol/L KOH and Ni was separated by selective precipitation using 0.3 mol/L H_(2)C_(2)O_(4).From the studies,it is possible to recover around 97.9%of NiO having 98.3%purity,around 25%of Al_(2)O_(3)was also recovered as alum-(K)having 99%purity and 14.7%of Al_(2)O_(3)as a salt of Al-K-C_(2)O_(4)-SO_(4).Sulphuric acid was found to be a suitable leaching agent for selective leaching and it was also observed that alum-(K)can be selectively crystallized from sulphate *** study also indicated the effective extraction and recovery of nickel and aluminium which were well supported by characterization studies using TG-DTA/DTG and XRD techniques.

关键词： spent catalyst leaching precipitation crystallization nickel aluminium

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