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Author (down) Guerrero, L.; Montalvo, S.; Huilinir, C.; Campos, J.L.; Barahona, A.; Borja, R.
Title Advances in the biological removal of sulphides from aqueous phase in anaerobic processes: A review Type
Year 2016 Publication Environmental Reviews Abbreviated Journal Environ. Rev.
Volume 24 Issue 1 Pages 84-100
Keywords anaerobic; denitrifying sulphide; desulphurization; microaerobic; modeling
Abstract In this paper, we review the latest developments in biological methods used in the removal of hydrogen sulphide, present in the liquid phase in anaerobic reactors. The toxicity of H2S to methane-forming microorganisms and the problems caused by the presence of this compound in the biogas generated during this process, as well as the main causes of hydrogen sulphide generation in anaerobic processes of wastes are also reviewed. We especially discuss the fundamentals in applying micro-aerobic conditions to remove dissolved hydrogen sulphide from the aqueous phase of an anaerobic reactor. The alternative technology of simultaneous removal of sulphide, nitrate, and organic matter is under recent investigation. Therefore, this review paper includes a study and analysis of the microbiological basis of this technology, the physical and chemical factors that influence the process and the potential application of this technology on different types of wastewaters and situations. Also considered are the fundamentals of both biofilm reactors and microbial fuel cells desulphurization. Because relatively few studies on modeling desulphurisation processes are available, we discuss the advances made in that area.
Address [Guerrero, Lorna; Barahona, Andrea] Univ Tecn Federico Santa Maria, Dept Ingn Quim & Ambiental, Casilla 110-V, Valparaiso, Chile, Email: lorna.guerrero@usm.cl
Corporate Author Thesis
Publisher Canadian Science Publishing, Nrc Research Press Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1208-6053 ISBN Medium
Area Expedition Conference
Notes WOS:000374245500007 Approved
Call Number UAI @ eduardo.moreno @ Serial 610
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Author (down) Da Silva, C.; Astals, S.; Peces, M.; Campos, J.L.; Guerrero, L.
Title Biochemical methane potential (BMP) tests: Reducing test time by early parameter estimation Type
Year 2018 Publication Waste Management Abbreviated Journal Waste Manage.
Volume 71 Issue Pages 19-24
Keywords Anaerobic digestion; Batch test; Biomethane potential; Kinetics; Modelling; Sensitivity functions
Abstract Biochemical methane potential (BMP) test is a key analytical technique to assess the implementation and optimisation of anaerobic biotechnologies. However, this technique is characterised by long testing times (from 20 to > 100 days), which is not suitable for waste utilities, consulting companies or plants operators whose decision-making processes cannot be held for such a long time. This study develops a statistically robust mathematical strategy using sensitivity functions for early prediction of BMP first-order model parameters, i.e. methane yield (B-0) and kinetic constant rate (k). The minimum testing time for early parameter estimation showed a potential correlation with the k value, where (i) slowly biodegradable substrates (k <= 0.1 d(-1)) have a minimum testing times of >= 15 days, (ii) moderately biodegradable substrates (0.1 < k < 0.2 d(-1)) have a minimum testing times between 8 and 15 days, and (iii) rapidly biodegradable substrates (k > 0.2 d(-1)) have testing times lower than 7 days. (C) 2017 Elsevier Ltd. All rights reserved.
Address [Da Silva, C.; Guerrero, L.] Univ Tecn Federico Santa Maria, Chem & Environm Engn Dept, Av Espana 1680,Casilla 110, Valparaiso 2340000, Chile, Email: cristopher.dasilva@usm.cl
Corporate Author Thesis
Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0956-053x ISBN Medium
Area Expedition Conference
Notes WOS:000423248500004 Approved
Call Number UAI @ eduardo.moreno @ Serial 821
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Author (down) Belmonte, M.; Hsieh, C.F.; Campos, J.L.; Guerrero, L.; Mendez, R.; Mosquera-Corral, A.; Vidal, G.
Title Effect of Free Ammonia, Free Nitrous Acid, and Alkalinity on the Partial Nitrification of Pretreated Pig Slurry, Using an Alternating Oxic/Anoxic SBR Type
Year 2017 Publication Biomed Research International Abbreviated Journal Biomed Res. Int.
Volume Issue Pages 7 pp
Keywords
Abstract The effect of free ammonia (NH3 or FA), free nitrous acid (HNO2 or FNA), and total alkalinity (TA) on the performance of a partial nitrification (PN) sequencing batch reactor (SBR) treating anaerobically pretreated pig slurry was studied. The SBR was operated under alternating oxic/anoxic (O/A) conditions and was fed during anoxic phases. This strategy allowed using organic matter to partially remove nitrite (NO2-) andnitrate (NO3-) generated during oxic phases. The desired NH4+ to NO2- ratioof 1.3gN/gNwas obtained when an Ammonium Loading Rate (ALR) of 0.09 gNH(4)(+)N/L d was applied. The system was operated at a solid retention time (SRT) of 15-20 d and dissolved oxygen (DO) levels higher than 3 mg O-2/L during the whole operational period. PN mainly occurred caused by the inhibitory effect of FNA on nitrite oxidizing bacteria (NOB). Once HNO2 concentration was negligible, NH4+ was fully oxidized to NO(3)(-)in spite of the presence of FA. The use of biomass acclimated to ammonium as inoculum avoided a possible effect of FA on NOB activity.
Address [Belmonte, Marisol; Hsieh, Chia-Fang; Vidal, Gladys] Univ Concepcion, Environm Sci Fac, Engn & Environm Biotechnol Grp, POB 160-C, Concepcion, Chile, Email: marisol.belmonte@upla.cl
Corporate Author Thesis
Publisher Hindawi Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2314-6133 ISBN Medium
Area Expedition Conference
Notes WOS:000409551200001 Approved
Call Number UAI @ eduardo.moreno @ Serial 777
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