Doubling the organic loading rate in the co-digestion of energy crops and manure – A full scale case study

Raising organic loading rate, and the behavior of dissolved CODcr (D-CODcr), VFA and specific methanogen activity, were investigated through a laboratory experiment for the start-up of a sludge recycling center. Moreover, application for MPN-PCR methods using a gene as a direct technique to measure the quantity of methanogen was attempted. It was recognized that specific methanogen activity depends on the quantity of methanogen, and that gas production does not reflect the condition of methane fermentation. The methane fermentation condition was checked through the specific methanogen activity and analysis of D-CODcr. The target organic loading rate was reached in the short period of about 30 days, and rapid start-up was successfully attained for a full-scale anaerobic digester.

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Benefits and drawbacks of food and dairy waste co-digestion at a high organic loading rate: A Moosburg WWTP case study

Waste Management ◽

10.1016/j.wasman.2019.06.008 ◽

2019 ◽

Vol 95 ◽

pp. 217-226 ◽

Cited By ~ 2

Author(s):

Claire Sembera ◽

Catherine Macintosh ◽

Sergi Astals ◽

Konrad Koch

Keyword(s):

Loading Rate ◽

Organic Loading Rate ◽

Organic Loading ◽

Dairy Waste

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Effects of organic loading rate on reactor performance and archaeal community structure in mesophilic anaerobic digesters treating municipal sewage sludge

Waste Management & Research ◽

10.1177/0734242x11417985 ◽

2011 ◽

Vol 29 (11) ◽

pp. 1117-1123 ◽

Cited By ~ 12

Author(s):

Eddie Gómez ◽

Jay Martin ◽

Frederick C. Michel

Keyword(s):

Organic Matter ◽

Community Structure ◽

Community Dynamics ◽

Loading Rate ◽

Archaeal Community ◽

Full Scale ◽

Municipal Sewage Sludge ◽

Organic Loading Rate ◽

Rrna Gene ◽

Organic Loading

In this study, the organic loading rate (OLR) of a high-solids anaerobic digestion (HSAD) system was increased from 3.4 to 5.0 gVS L−1 day−1 and reactor stability, performance and microbial community structure were determined. Laboratory simulations (3.5 L) of the full-scale process (500 dry ton year−1) were conducted using continuously stirred-tank mesophilic reactors. OLRs of 3.4 gVS L−1day−1 (equal to the full-scale HSAD), 4.0, 4.5 and 5.0 gVS L−1day−1 were evaluated. Biochemical parameters and archaeal community dynamics were measured over 42 days of steady state operation. Results showed that increasing OLR increased the amount of organic matter conversion and resulted in higher organic matter removal and volumetric methane (CH4) production (VMP) rates. The highest volatile solids (VS) removal and VMP results of 54 ± 2% and 1.4 ± 0.1 L CH4 L−1day−1 were observed for 5.0 gVS L−1 day−1. The efficiency of reactor conversion of organic matter to CH4 was found to be similar in all the treatments with an average value of 0.57 ± 0.07 LCH4 gVS−1removed. 16S rRNA gene terminal restriction fragment polymorphism (T-RFLP) analyses revealed that archaeal TRFs remained stable during the experiment accounting for an average relative abundance (RA) of 81 ± 1%. Archaea consistent with multiple terminal restriction fragments (TRFs) included members of the Euryarchaeota and Crenarchaeota phyla, including acetoclastic and hydrogenotrophic groups. In conclusion, this laboratory-scale study suggests that performance and stability as well as the archaeal community structure in this HSAD system was unaffected by increasing the OLR by nearly 50% and that this increase resulted in a similar increase in the amount of CH4 gas generated.

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Performance of a Full-Scale Anaerobic Digestion on Bakery Wastewater Treatment : Effect of Modified Distribution System

Jurnal Riset Teknologi Pencegahan Pencemaran Industri ◽

10.21771/jrtppi.2020.v11.no1.p12-18 ◽

2020 ◽

Vol 11 (1) ◽

pp. 12-18

Author(s):

Hanny Vistanty ◽

Rizal Awaludin Malik ◽

Aris Mukimin

Keyword(s):

Anaerobic Digestion ◽

Distribution System ◽

Suspended Solids ◽

Loading Rate ◽

Oxygen Demand ◽

Degradation Process ◽

Full Scale ◽

Organic Loading Rate ◽

Organic Loading ◽

External Circulation

The effectiveness of a full-scale anaerobic digestion pretreatment was evaluated and the effect of wastewater distribution system was determined on the performance of bakery wastewater (BW) treatment. The BW was fed to 3 series of anaerobic compartments as the main degradation process. The distribution system of first compartment was modified and circulated to enhance contact and efficiency. While the effluent of last compartment was partly returned to the first compartment as an external circulation and the other part was further processed in activated sludge under aerobic conditions. The overall system was able to remove chemical oxygen demand (COD), total suspended solids (TSS), and biochemical oxygen demand (BOD) up to 97.7%, 99.7%, and 99.6%, respectively, at maximum organic loading rate of 6.3 kg COD/m3day. High removal of pollutants indicated that modified distribution of circulation is advantageous to the BW treatment

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