The Characteristics of the Mixed Sludge Supernatant by Mesophilic Two-Phase Anaerobic Digestion Process

2013 ◽  
Vol 295-298 ◽  
pp. 1393-1397
Author(s):  
Qi Wei Liu ◽  
Xiao Yu Zhang
Keyword(s):  
Anaerobic Digestion ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Digestion Time ◽  
Two Phase ◽  
Digestion Process ◽  
Acidogenic Phase ◽  
Methanogenic Phase ◽  
Better Than

The mesophilic (35°C) two-phase anaerobic digestion ( TPAD) process was used to treat mixed sludge from primary sedimentation and secondary sedimentation tanks ( 1:3 ). The results show that when HRT is 10 days and organic loading rate is 1.5kgVS/ (m3•d), the upper-liquid COD of methanogenic phase and acidogenic phase increased along with time, but not obviously; The contents oSuperscript textf polysaccharides and proteins in upper-liquid multiplied increased with digestion time, polysaccharides and proteins in acidogenic phase upper-liquid were more than methanogenic phase; The value of CST became larger after being digested by mesophilic two-phase anaerobic digestion, but the dewaterability of sludge in methanogenic phase is better than acidogenic phase.

scholarly journals Effects of Organic Loading Rate on the Performance of a Pressurized Anaerobic Filter in Two-Phase Anaerobic Digestion

Energies ◽  
2014 ◽  
Vol 7 (2) ◽  
pp. 736-750 ◽  
Author(s):  
Yuling Chen ◽  
Benjamin Rößler ◽  
Simon Zielonka ◽  
Anna-Maria Wonneberger ◽  
Andreas Lemmer
Keyword(s):  
Anaerobic Digestion ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Two Phase ◽  
Anaerobic Filter

The effect of organic loading rate on the anaerobic digestion of two-phase olive mill solid residue derived from fruits with low ripening index

2007 ◽  
Vol 82 (3) ◽  
pp. 259-266 ◽  
Author(s):  
Bárbara Rincón ◽  
Lissette Travieso ◽  
Enrique Sánchez ◽  
María de los Ángeles Martín ◽  
Antonio Martín ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Solid Residue ◽  
Organic Loading ◽  
Two Phase ◽  
Ripening Index ◽  
Olive Mill

scholarly journals Potential production of struvite from the anaerobic digestion of food waste: analysis in one-phase and two-phase configurations

2021 ◽  
Author(s):  
Brayan Alexis Parra-Orobio ◽  
Andrea Pérez-Vidal ◽  
Patricia Torres-Lozada
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Loading Rate ◽  
Organic Amendments ◽  
Organic Loading Rate ◽  
Type B ◽  
Organic Loading ◽  
Regulatory Requirements ◽  
Potential Production ◽  
Two Phase

Abstract Anaerobic digestion (AD) of food waste (FW) has been gaining more interest as it has potential for the production of organic amendments with high struvite (NH4MgPO4·6H2O) content, which is a nutrient of great interest in sustainable agriculture. In this study, the influence of AD of FW in one- and two-phase configurations on methane production and the potential for struvite formation using digestate, was evaluated. It was found that the two-phase is a more efficient as its organic loading rate is 18% higher than that of one-phase configuration. In addition, the two-phase yielded a higher methane content in biogas (>60%) and a higher organic matter transformation in each of the AD stages (>20%); further, the digestate complied with the regulatory requirements for the use of organic amendments, thereby being deemed as a Type-B material with a struvite precipitation potential, exceeding 80%, as opposed to the digestate from one-phase configuration, which may represent a revenue of up to US$ 26,505 per year.

Start-up phase optimization of two-phase anaerobic digestion of food waste: Effects of organic loading rate and hydraulic retention time

2021 ◽  
Vol 296 ◽  
pp. 113064
Author(s):  
Carina Malinowsky ◽  
Willian Nadaleti ◽  
Letícia Rech Debiasi ◽  
Ailton João Gonçalves Moreira ◽  
Remy Bayard ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Two Phase ◽  
Start Up ◽  
Phase Optimization

Impact of organic loading rate and reactor design on thermophilic anaerobic digestion of mixed supermarket waste

2021 ◽  
Vol 123 ◽  
pp. 52-59
Author(s):  
L. Megido ◽  
L. Negral ◽  
Y. Fernández-Nava ◽  
B. Suárez-Peña ◽  
P. Ormaechea ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Loading Rate ◽  
Reactor Design ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Thermophilic Anaerobic Digestion

Effect of organic loading rate on anaerobic digestion of thermally pretreated Scenedesmus sp. biomass

2013 ◽  
Vol 129 ◽  
pp. 219-223 ◽  
Author(s):  
C. González-Fernández ◽  
B. Sialve ◽  
N. Bernet ◽  
J.P. Steyer
Keyword(s):  
Anaerobic Digestion ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Organic Loading

Liquefaction and methanization of solid and liquid coffee wastes by two phase anaerobic digestion process

2003 ◽  
Vol 48 (6) ◽  
pp. 255-262 ◽  
Author(s):  
E. Houbron ◽  
A. Larrinaga ◽  
E. Rustrian
Keyword(s):  
Anaerobic Digestion ◽  
Wash Water ◽  
Organic Loading Rate ◽  
Two Phase ◽  
Experimental Conditions ◽  
Coffee Pulp ◽  
Anaerobic Digestion Process ◽  
Digestion Process ◽  
Working Volume ◽  
Acidogenic Reactor

This study attempted to investigate the feasibility of volatile fatty acid (VFA) production from coffee pulp hydrolyse, and further to determine the potential of methanization of both the pre-acidified effluent and the coffee wastewater. The experiments were carried out in 2 completely mixed reactors, each one with a working volume of 4 litres. Coffee pulp was used as substrate in the acidogenic reactor and different mixtures of pulper and wash-water and pre-acidified effluent in the methanogenic one. The acidogenic and methanogenic reactors were operated at an organic loading rate of 5 COD g.l-1.d-1 and 0.5 COD g.l-1.d-1. The total, soluble and VFA's effluent COD concentrations of the acidogenic reactor present average values of 57.75, 17.00 and 13.92 g.l-1 respectively. Under these experimental conditions, 23% (COD based) of coffee pulp was hydrolysed with a rate of 1.32 gCOD.l-1.d-1 and the soluble fraction was transformed to VFA's with an acidification efficiency of 82%. Total VFA's concentration reached a value of 13.9 gCOD.l-1, and acetate, propionate, butyrate and valerate represented 52%, 28%, 9% and 11% respectively of the liquid phase COD. In the methanogenic reactor, COD removal and methanization of fresh coffee wastewater, pre-acidified effluent and both combined occur with an efficiency of 85% to 95% respectively, with a characteristic biogas composition of 80% CH4 and 20% CO2. These results show that a humid coffee ‘Beneficio’ processing daily 23 tons of cherry coffee (fresh fruit), equipped with a two stage anaerobic digestion process could generate at least 1,886 CH4 m3.d-1. This represents an increase in methane production by a factor 3 to 5 compared to a ‘Beneficio’ using anaerobic digestion only for the treatment of its wastewater.

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