Effect of Sulfide Inhibition and Organic Shock Loading on Anaerobic Biofilm Reactors Treating a Low‐Temperature, High‐Sulfate Wastewater

Abstract

McDonald, Heather Brown. "The effect of sulfide inhibition and organic shock loading on anaerobic biofilm reactors treating a lowtemperature, high-sulfate wastewater. mg COD/L. It was determined that long-term stability could be achieved in reactors that contained well balanced, stable populations of lactate-and propionate-degrading SRB and aceticlastic methanogens. Significant populations of fermenters present resulted in an imbalance which caused lactate to be routed through an additional pathway where propionate was formed. Greater numbers of MA than bacteria were found in all reactors.This may be attributed to the availability of acetate in the reactors for MA consumption and to using the immobilized fixed bed reactor type. Aceticlastic methanogens were the dominant methanogen, and were observed to remove nearly all acetate produced in all reactors. SRB were observed to remove lactate in microbially balanced reactors, whereas fermenters degraded lactate in reactors with less balanced populations.

Integrated co-cultured bacterial strains capabilities to aqueous sulfide and chemical oxygen demand mitigation from high-strength petroleum refinery wastewater

“…al., 2017). It was reported by other researchers that the inhibitory concentration of aqueous dissociated sulfides ions is in the range of 100 -800 ppm, while for the undissociated form (H S) it ranges between 2 50 -430 ppm (McDonald, 2009;Schultz and Kishony, 2013). This reports further supported the tolerance capabilities of this model (BMC) to high-strength PRW with aqueous sulfide concentration and COD of up to 500 ppm and 8,155 mg/L.…”

Sulfur, Phosphorus and Metals in the Stoichiometric Estimation of Biomethane and Biohydrogen Yields

“…The decomposition of sulfur compounds under anaerobic conditions produces hydrogen sulfide (H 2 S) [15], and this reaction competes with the formation of methane [16] and molecular hydrogen. Despite the fact that sulfur has an oxidation state of S 2− in most organic compounds that will not require any reducing reaction, sulfur also exists as part of sulfate groups (in compounds like sodium dodecyl sulfate), and the conversion of sulfate groups will consume the reducing agent needed for the formation of CH 4 or H 2 [17]. Another reason to account for sulfur content in a substrate is that the microbial consortia involved in anaerobic digestion processes can also have representatives that are able to carry out the anaerobic oxidation of methane (AOM) [18] based on the following equation:…”

Παράμετροι Βιοκαταβύθισης Ιόντων Μετάλλων Σε Βιολογικούς Αντιδραστήρες Κλίνης

“…Άμμξπ (Elliott et al, 1998;Jong et al, 2003;2006;Maree et al, 1985;Schreyer et al, 1999;Zellner et al, 1995) Ατοϊπ πξλσξσοεθάμηπ (Silva et al, 2002) Γσαλί (Alvarez et al, 2006;Kolmert et al, 2001;Nagpal et al, 2000b) Δλατοϊπεςοα (Alvarez et al, 2006;McDonald et al, 2009) Εεϊλιθξπ (Sahinkaya et al, 2010a) Οέςοα (Maree et al, 1985) Οξζξλάμη (Battaglia-Brunet et al, 2004;Battaglia-Brunet et al, 2012) Οξλσαιθσλέμιξ υαμηλήπ πσκμϊςηςαπ (Celis-Garcia et al, 2007;Gallegos-Garcia et al, 2009) Οξλσποξπσλέμιξ (El Bayoumy et al, 1999a;El Bayoumy et al, 1999b;Steed et al, 2000) Οσοιςικϊ αμϊογαμξ σλικϊ (Kaksonen et al, 2003a;Kaksonen et al, 2003b;Kaksonen et al, 2004a;Kaksonen et al, 2006;Nevatalo et al, 2010c) Ρκϊμη άμθοακα (Ma et al, 1997) Flocor (Thabet et al, 2009) Flootek® (Tuppurainen et al, 2002) Αμςιδοαρςήοαπ κλίμηπ ιλύξπ (Valdes et al, 2006).…”

“…Ξι αμςιδοαρςήοεπ ρςαθεοήπ κλίμηπ (PBR) είμαι ρυεςικά απλξί ρςη διαυείοιρή ςξσπ, αμθεκςικξί ρε ςσυϊμ μεςαβξλέπ ςχμ ρσμθηκόμ λειςξσογίαπ ςηπ εγκαςάρςαρηπ και εναιοεςικά απξδξςικξί (Kolmert et al, 1997 ThOD SO  = 2) ρε ξσδέςεοξ pH ρςξσπ 20 C, έδεινε ϊςι η ρςαθεοϊςηςα ςηπ απϊδξρηπ ςηπ διεογαρίαπ ρε πεοιπςόρειπ απϊςξμηπ αϋνηρηπ ςξσ ξογαμικξϋ τξοςίξσ ξτειλϊςαμ ρςημ παοξσρία πξλσπληθξϋπ και ρςαθεοήπ μικςήπ καλλιέογειαπ θειξαμαγχγικόμ και μεθαμξγϊμχμ βακςηοίχμ (McDonald et al, 2009). Ρςη βιβλιξγοατία, σπάουει πλήθξπ πειοαμαςικόμ μελεςόμ εταομξγήπ ςχμ αμςιδοαρςήοχμ PBR, κσοίχπ ρε καςακϊοστη διάςανη με αμξδική οξή αλλά και ρε ξοιζϊμςια διάςανη (Damianovic et al, 2007), για ςη θειξαμαγχγική επενεογαρία σδαςικόμ διαλσμάςχμ σφηλήπ ρσγκέμςοχρηπ θειικόμ ιϊμςχμ και μεςάλλχμ, με ρσμβαςικέπ (Οίμακαπ 3.7) ή εμαλλακςικέπ (Cruz Viggi et al, 2010;Silva et al, 2002;Thabet et al, 2009) πηγέπ άμθοακα/ηλεκςοξμίχμ.…”