000165098 001__ 165098
000165098 005__ 20251212165957.0
000165098 0247_ $$2doi$$a10.1016/j.psep.2019.07.016
000165098 0248_ $$2sideral$$a114933
000165098 037__ $$aART-2019-114933
000165098 041__ $$aeng
000165098 100__ $$0(orcid)0000-0003-2074-7083$$aLópez, Andrea$$uUniversidad de Zaragoza
000165098 245__ $$aHow does urban wastewater treatment affect the microbial quality of treated wastewater?
000165098 260__ $$c2019
000165098 5203_ $$aThe design of wastewater treatment plants (WWTP) includes facilities for the removal of suspended solids, organic matter, nitrogen and phosphorous, as required in current legislation, while removal of microorganisms is not literally emphasized. Although the different unit processes have some effect on microbial populations, disinfection is not achieved in many cases unless a specific step is included to regenerate wastewater. This study assesses the effect of the unit processes of six WWTPs that treat municipal wastewater on five microbiological parameters (total coliforms, E. coli, Enterococcus sp., Staphylococcus aureus and Pseudomonas aeruginosa), as well as their contribution to receiving waters. Bacterial concentration in the inlet of WWTPs varies from the lowest concentration of Staphylococcus aureus (104 CFU/100 mL), to the highest for total coliforms (108 CFU/100 mL), independently of the industrial activity discharging to the WWTP. Considering log bacterial removal of each step of treatment processes, trickling filters reduced 2.6 and 1.5-log Enterococcus sp. and Pseudomonas sp. respectively, secondary decanters achieved 2.5-log average removals and ponds reduced bacteria in a range from 1 to 2.2-log, being the processes with the highest bacteria removal, although in the case of secondary decanters this depends on design parameters such as hydraulic residence time, loads of solids, or types of previous biological treatments. The average of the bacteria concentration in the outlet of the six WWTPs was between 103–106 CFU/100 mL. The effect of discharging these bacteria on the quality of receiving waters was assessed by analyzing microbial concentration upstream and downstream of the discharge point. In almost all cases, the bacterial concentration upstream of the discharge point was similar to downstream concentration because the effluent is rapidly diluted in the receiving river, not representing a risk to ecosystems.
000165098 540__ $$9info:eu-repo/semantics/closedAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000165098 590__ $$a4.966$$b2019
000165098 591__ $$aENGINEERING, ENVIRONMENTAL$$b13 / 53 = 0.245$$c2019$$dQ1$$eT1
000165098 591__ $$aENGINEERING, CHEMICAL$$b23 / 142 = 0.162$$c2019$$dQ1$$eT1
000165098 592__ $$a1.103$$b2019
000165098 593__ $$aChemical Engineering (miscellaneous)$$c2019$$dQ1
000165098 593__ $$aSafety, Risk, Reliability and Quality$$c2019$$dQ1
000165098 593__ $$aEnvironmental Engineering$$c2019$$dQ1
000165098 593__ $$aEnvironmental Chemistry$$c2019$$dQ2
000165098 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000165098 700__ $$aRodríguez-Chueca, Jorge
000165098 700__ $$0(orcid)0000-0002-7456-4912$$aMosteo, Rosa$$uUniversidad de Zaragoza
000165098 700__ $$aGómez, Jairo
000165098 700__ $$0(orcid)0000-0002-9273-5885$$aRubio, E.$$uUniversidad de Zaragoza
000165098 700__ $$0(orcid)0000-0003-0765-7227$$aGoñi, Pilar$$uUniversidad de Zaragoza
000165098 700__ $$0(orcid)0000-0003-3014-0322$$aOrmad, María P.$$uUniversidad de Zaragoza
000165098 7102_ $$11008$$2660$$aUniversidad de Zaragoza$$bDpto. Microb.Med.Pr.,Sal.Públ.$$cÁrea Parasitología
000165098 7102_ $$11008$$2615$$aUniversidad de Zaragoza$$bDpto. Microb.Med.Pr.,Sal.Públ.$$cÁrea Medic.Prevent.Salud Públ.
000165098 7102_ $$15005$$2790$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Tecnologi. Medio Ambiente
000165098 773__ $$g130 (2019), 22-30$$pProcess saf. environ. prot.$$tPROCESS SAFETY AND ENVIRONMENTAL PROTECTION$$x0957-5820
000165098 8564_ $$s3101876$$uhttps://zaguan.unizar.es/record/165098/files/texto_completo.pdf$$yVersión publicada
000165098 8564_ $$s2494657$$uhttps://zaguan.unizar.es/record/165098/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000165098 909CO $$ooai:zaguan.unizar.es:165098$$particulos$$pdriver
000165098 951__ $$a2025-12-12-14:42:37
000165098 980__ $$aARTICLE