Contact Stabilization with Enhanced Accumulation Process for Energy Recovery from Sewage
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F16%3A43902958" target="_blank" >RIV/60461373:22320/16:43902958 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1089/ees.2016.0155" target="_blank" >http://dx.doi.org/10.1089/ees.2016.0155</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1089/ees.2016.0155" target="_blank" >10.1089/ees.2016.0155</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Contact Stabilization with Enhanced Accumulation Process for Energy Recovery from Sewage
Popis výsledku v původním jazyce
Conventional activated sludge (CAS) system is currently the predominant technology in wastewater treatment, but its painfully energy-intensive aerobic pathway has led researchers to investigate alternative technologies. These technologies are often focused on recovery of chemical energy from sewage. In this article, we introduce the CoSEA (Contact Stabilization with Enhanced Accumulation) process, a novel upconcentration method that separates the most valuable sewage content through a modified bioflocculation-adsorption-sedimentation-stabilization process for further anaerobic treatment. Raw sewage was treated in a 1 L psychrophilic (15 degrees C) sequencing batch reactor (SBR). By using an SBR, a time-concentration gradient was applied to enhance accumulation abilities of the sludge. The reactor was operated at very low sludge age (<1 day) and with a short (1.5 h) aeration phase. We tested two initial conditions: (1) operation with inoculation by activated sludge and (2) without any inoculation. Average chemical oxygen demand removal with and without inoculation was as high as 80% and 70%, respectively. Up to 55% of incoming chemical energy was recovered as gaseous methane. This recovery was significantly higher than can be typically achieved by CAS even with optimized anaerobic stabilization. Although CoSEA effluent requires subsequent removal of nutrients (N, P), the process is a promising new approach for energy recovery in a main wastewater treatment line. The process is especially suitable for moderate climates, where direct anaerobic digestion is so far not suitable for sewage treatment.
Název v anglickém jazyce
Contact Stabilization with Enhanced Accumulation Process for Energy Recovery from Sewage
Popis výsledku anglicky
Conventional activated sludge (CAS) system is currently the predominant technology in wastewater treatment, but its painfully energy-intensive aerobic pathway has led researchers to investigate alternative technologies. These technologies are often focused on recovery of chemical energy from sewage. In this article, we introduce the CoSEA (Contact Stabilization with Enhanced Accumulation) process, a novel upconcentration method that separates the most valuable sewage content through a modified bioflocculation-adsorption-sedimentation-stabilization process for further anaerobic treatment. Raw sewage was treated in a 1 L psychrophilic (15 degrees C) sequencing batch reactor (SBR). By using an SBR, a time-concentration gradient was applied to enhance accumulation abilities of the sludge. The reactor was operated at very low sludge age (<1 day) and with a short (1.5 h) aeration phase. We tested two initial conditions: (1) operation with inoculation by activated sludge and (2) without any inoculation. Average chemical oxygen demand removal with and without inoculation was as high as 80% and 70%, respectively. Up to 55% of incoming chemical energy was recovered as gaseous methane. This recovery was significantly higher than can be typically achieved by CAS even with optimized anaerobic stabilization. Although CoSEA effluent requires subsequent removal of nutrients (N, P), the process is a promising new approach for energy recovery in a main wastewater treatment line. The process is especially suitable for moderate climates, where direct anaerobic digestion is so far not suitable for sewage treatment.
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
EI - Biotechnologie a bionika
OECD FORD obor
—
Návaznosti výsledku
Projekt
—
Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Environmental Engineering Science
ISSN
1092-8758
e-ISSN
—
Svazek periodika
33
Číslo periodika v rámci svazku
11
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
9
Strana od-do
873-881
Kód UT WoS článku
000386943600005
EID výsledku v databázi Scopus
2-s2.0-84994745372