Tratamiento biológico de aguas residuales en reactor anaerobio de flujo ascendente de empresa productora de grenetina

The anaerobic reactors of a flavorless jelly producing company; had a low efficiency in the treatment of their wastewater, with approximately 12% of COD removal. For this reason, it´s operation was evaluated, in a pilot scale reactor, using as inoculum, sludge from the wastewater treatment of a similar facility, with an average Specific Methanogenic Activity of 0.115 g COD/gSSV.d. We worked with an initial concentration of 35 kgSSV/m3 of the inoculum, an average organic load of 2.6843 kgCOD/m3d and wastewater with COD of 6797 mg/L and total nitrogen of 1213 mg/L. The feed flow was 0.264 L/h, in order to obtain an hydraulic retention time of 27.14 h, equal to the value of the reactor of the company. An average COD removal of 65.24% was achieved. The results showed sulphide concentrations of 461.4 mg/L and ammonium nitrogen of 1054.4 mg/L; that were not inhibitory.

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Effects of hydraulic retention time on the process performance and microbial community structure of an anaerobic single-stage semi-pilot scale reactor for the treatment of food waste

International Biodeterioration & Biodegradation ◽

10.1016/j.ibiod.2020.104999 ◽

2020 ◽

Vol 152 ◽

pp. 104999

Author(s):

Sagor Kumar Pramanik ◽

Fatihah Binti Suja ◽

Biplob Kumar Pramanik

Keyword(s):

Community Structure ◽

Microbial Community ◽

Food Waste ◽

Microbial Community Structure ◽

Retention Time ◽

Hydraulic Retention Time ◽

Pilot Scale ◽

Process Performance ◽

Pilot Scale Reactor ◽

Scale Reactor

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Enhancement of Methanogenic Activity in Volumetrically Undersized Reactor by Mesophilic Co-Digestion of Sewage Sludge and Aqueous Residue

Sustainability ◽

10.3390/su13147728 ◽

2021 ◽

Vol 13 (14) ◽

pp. 7728

Author(s):

Vincenzo Torretta ◽

Athanasia K. Tolkou ◽

Ioannis A. Katsoyiannis ◽

Francesca Maria Caccamo ◽

Marco Carnevale Miino ◽

...

Keyword(s):

Sewage Sludge ◽

Energy Recovery ◽

Hydraulic Retention Time ◽

Biogas Production ◽

Treatment Plant ◽

Pilot Scale ◽

Methanogenic Activity ◽

Anaerobic Reactors ◽

Aqueous Residue ◽

First Time

To date, energy recovery from biological sewage sludge (BSS) by anaerobic digestion has been very popular. However, it can often happen that anaerobic reactors are volumetrically undersized, thus reducing performance in terms of biogas production. A continuous-flow pilot-scale plant was used to investigate, for the first time, the effects of mesophilic anaerobic co-digestion (MACoD) of sewage sludge and aqueous residue (AR) from a biosolids treatment plant (BTP) on methanogenic activity under low hydraulic retention time (HRT) conditions (to simulate the undersizing of the reactor). The results showed that the digestate is always more rapidly biodegradable than the matrices fed, while particulate COD hydrolyzed (12 ± 1.3%) is independent of the quantity of AR dosed. Feeding over 35% of soluble OLR, the total VFAs in the system strongly decreased, despite the low HRT. In correspondence with higher dosages of AR, the percentage of CH4 increased up to 77–78% and the CO2 CH4−1 ratio decreased to 0.25 ± 0.2. Specific methane production increased from 0.09 ± 0.01 m3CH4 kgCODremoved−1 with BSS alone to 0.28 ± 0.01 m3CH4CH4 kgCODremoved−1 in the case of BSS co-digested with AR. Moreover, co-digestion with AR from a BTP allowed continuous specific methanogenic activity to be enhanced from 1.76 ± 0.02 m3CH4 tVSS−1 d−1 to 6.48 ± 0.88 m3CH4 tVSS−1 d−1. Therefore, the MACoD of BSS and AR from a BTP could be a good solution to enhance methanogenic activity in a volumetrically undersized anaerobic digester with reduced HRT.

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Fluidized bed gasification of eucalyptus chips: Axial profiles of syngas composition in a pilot scale reactor

Energy ◽

10.1016/j.energy.2020.119604 ◽

2021 ◽

Vol 219 ◽

pp. 119604

Author(s):

Francesco Parrillo ◽

Filomena Ardolino ◽

Gabriele Calì ◽

Davide Marotto ◽

Alberto Pettinau ◽

...

Keyword(s):

Fluidized Bed ◽

Pilot Scale ◽

Pilot Scale Reactor ◽

Scale Reactor

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The Start-Up of Continuous Biohydrogen Production from Cheese Whey: Comparison of Inoculum Pretreatment Methods and Reactors with Moving and Fixed Polyurethane Carriers

Applied Sciences ◽

10.3390/app11020510 ◽

2021 ◽

Vol 11 (2) ◽

pp. 510

Author(s):

Elza R. Mikheeva ◽

Inna V. Katraeva ◽

Andrey A. Kovalev ◽

Dmitriy A. Kovalev ◽

Alla N. Nozhevnikova ◽

...

Keyword(s):

Cheese Whey ◽

Hydraulic Retention Time ◽

Continuous Production ◽

Oxygen Demand ◽

Organic Load ◽

Anaerobic Sludge ◽

Acid Pretreatment ◽

Methanogenic Activity ◽

Start Up ◽

Load Rate

This article presents the results of the start-up of continuous production of biohydrogen from cheese whey (CW) in an anaerobic filter (AF) and anaerobic fluidized bed (AFB) with a polyurethane carrier. Heat and acid pretreatments were used for the inactivation of hydrogen-scavengers in the inoculum (mesophilic and thermophilic anaerobic sludge). Acid pretreatment was effective for thermophilic anaerobic sludge to suppress methanogenic activity, and heat treatment was effective for mesophilic anaerobic sludge. Maximum specific yields of hydrogen, namely 178 mL/g chemical oxygen demand (COD) and 149 mL/g COD for AFB and AF, respectively, were obtained at the hydraulic retention time (HRT) of 4.5 days and organic load rate (OLR) of 6.61 kg COD/(m3 day). At the same time, the maximum hydrogen production rates of 1.28 and 1.9 NL/(L day) for AF and AFB, respectively, were obtained at the HRT of 2.02 days and OLR of 14.88 kg COD/(m3 day). At the phylum level, the dominant taxa were Firmicutes (65% in AF and 60% in AFB), and at the genus level, Lactobacillus (40% in AF and 43% in AFB) and Bifidobacterium (24% in AF and 30% in AFB).

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Pretreatment of Corn Stover by Low Moisture Anhydrous Ammonia (LMAA) in a Pilot-Scale Reactor and Bioconversion to Fuel Ethanol and Industrial Chemicals

Applied Biochemistry and Biotechnology ◽

10.1007/s12010-016-1982-2 ◽

2016 ◽

Vol 179 (1) ◽

pp. 111-125 ◽

Cited By ~ 14

Author(s):

Nhuan P. Nghiem ◽

Gerard E. Senske ◽

Tae Hyun Kim

Keyword(s):

Corn Stover ◽

Pilot Scale ◽

Fuel Ethanol ◽

Industrial Chemicals ◽

Anhydrous Ammonia ◽

Pilot Scale Reactor ◽

Scale Reactor

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Anaerobic co-digestion in a liquid recirculation pilot-scale reactor: Thermal and hydraulic study

Energy Reports ◽

10.1016/j.egyr.2019.09.014 ◽

2020 ◽

Vol 6 ◽

pp. 496-502 ◽

Cited By ~ 4

Author(s):

Mohammed El Ibrahimi ◽

Ismail Khay ◽

Anas El Maakoul ◽

Mohamed Ould Moussa ◽

Abdelwahed Barkaoui ◽

...

Keyword(s):

Pilot Scale ◽

Liquid Recirculation ◽

Pilot Scale Reactor ◽

Scale Reactor

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Nitrification in hybrid reactor with a recycled plastic support material

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132005000400030 ◽

2005 ◽

Vol 48 (spe) ◽

pp. 243-248 ◽

Cited By ~ 1

Author(s):

Delmira Beatriz Wolff ◽

Juan Carlos Ochoa ◽

Etienne Paul ◽

Rejane Helena Ribeiro da Costa

Keyword(s):

Nitrogen Removal ◽

Pilot Scale ◽

Hybrid Reactor ◽

Biomass Growth ◽

Support Material ◽

Filling Rate ◽

Working Volume ◽

Two Phases ◽

Pilot Scale Reactor ◽

Scale Reactor

This work investigated the nitrification in a hybrid moving bed pilot scale reactor, which used a low density recycled plastic support material for biomass growth. The filling rate was 20% of its working volume (22L). The feeding and recirculation outflow was 45L/day. The reactor operated at a temperature of 16ºC, in two phases, according to the sludge retention time (SRT): A phase was 10 days and B phase was 3 days (average values). The applied average volumetric nitrogen and organic loads were 0.16KgTKN/m3.day and 1kgCOD/m³.day, respectively. The results showed an average nitrogen removal of 95% and average COD removal of 89%, in both A and B phases. Nitrogen removal rates were independents of the SRT.

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