Start-up and steady-state results of a UASB reactor treating high pH baker's yeast molasses wastewater for methane production

2016 ◽  
Vol 92 (4) ◽  
pp. 775-780 ◽  
Author(s):  
Magdalini Mischopoulou ◽  
Sotirios D Kalamaras ◽  
Panagiotis Naidis ◽  
Thomas A Kotsopoulos ◽  
Petros Samaras
Keyword(s):  
Steady State ◽  
Methane Production ◽  
Baker’S Yeast ◽  
Uasb Reactor ◽  
Baker's Yeast ◽  
High Ph ◽  
Molasses Wastewater ◽  
Start Up

Integrated biological (anaerobic–aerobic) and physico-chemical treatment of baker's yeast wastewater

2005 ◽  
Vol 52 (10-11) ◽  
pp. 273-280 ◽  
Author(s):  
S. Kalyuzhnyi ◽  
M. Gladchenko ◽  
E. Starostina ◽  
S. Shcherbakov ◽  
B. Versprille
Keyword(s):  
Separation Process ◽  
Baker’S Yeast ◽  
Uasb Reactor ◽  
Baker's Yeast ◽  
Organic Loading ◽  
Cultivation Medium ◽  
Loading Rates ◽  
Physico Chemical ◽  
Yeast Production ◽  
Yeast Wastewater

The UASB reactor (35°C) was quite efficient for removal of bulk COD (52–74%) from simulated (on the basis of cultivation medium from the first separation process) general effluent of baker's yeast production (the average organic loading rates varied from 8.1 to 16g COD/l/d). The aerobic-anoxic biofilter (19–23°C) can be used for removal of remaining BOD and ammonia from anaerobic effluents; however, it suffered from COD-deficiency to fulfil denitrification requirements. To balance COD/N ratio, some bypass (∼10%) of anaerobically untreated general effluent should be added to the biofilter feed. The application of iron (III)-, aluminium- or calcium-induced coagulation for post-treatment of aerobic-anoxic effluents can fulfil the limits for discharge to sewerage (even for colour mainly exerted by hardly biodegradable melanoidins), however, the required amounts of coagulants were relatively high.

scholarly journals Anaerobic Treatment of Baker's Yeast Wastewater in UASB Reactor.

1995 ◽  
Vol 18 (5) ◽  
pp. 373-381 ◽  
Author(s):  
Kazuo SHIBAZAKI ◽  
Shigeru KOBAYASHI ◽  
Nobuyuki ASHIKAGA ◽  
Takashi MENJU
Keyword(s):  
Anaerobic Treatment ◽  
Baker’S Yeast ◽  
Uasb Reactor ◽  
Baker's Yeast ◽  
Yeast Wastewater

Anaerobic Treatment of Synthetic Sulfate-Containing Wastewater under Thermophilic Conditions

1992 ◽  
Vol 25 (7) ◽  
pp. 193-202 ◽  
Author(s):  
A. Visser ◽  
Y. Gao ◽  
G. Lettinga
Keyword(s):  
Waste Water ◽  
Steady State ◽  
Methane Production ◽  
Anaerobic Treatment ◽  
Uasb Reactor ◽  
Methanogenic Activity ◽  
Sulfate Reducers ◽  
Activity Measurements ◽  
Thermophilic Conditions ◽  
Temperature Optima

The anaerobic treatment of a sulfate-containing waste water using a UASB reactor was studied at 55 °C. As substrate, acetate and a mixture of acetate, propionate and butyrate were used. With acetate as substrate it was shown that sulfate reducers are capable of using acetate as substrate at 55 °C, and that, under the conditions applied, they even outcompete acetoclastic methanogens. Batch-activity measurements with the sludge revealed temperature optima for acetate, propionate and butyrate degradation of ± 56-59, < 40 and 52-54 °C respectively. After switching the substrate to a mixture of acetate, propionate and butyrate, the reactor pH dropped from 8.3-8.6 to 7.6-7.9 and the methane production recovered. After the establishment of a pseudo-steady state situation the part of COD removed by methane production and sulfate reduction was ± 60 and 40 %. Results of batch activity experiments showed that the methanogenic activity dropped sharply at pH ≥ 8 and ≤ 6 causing a predominance of sulfate reducers at pH ≥ 8.

Bacterial community structure and diversity during establishment of an anaerobic bioreactor to treat swine wastewater

2010 ◽  
Vol 61 (1) ◽  
pp. 243-252 ◽  
Author(s):  
Ping Li ◽  
Yanxin Wang ◽  
Yanhong Wang ◽  
Kun Liu ◽  
Lei Tong
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Methane Production ◽  
Bacterial Community Structure ◽  
Removal Rate ◽  
Swine Wastewater ◽  
Uasb Reactor ◽  
Start Up ◽  
Bacterial Structure ◽  
Cod Removal Rate

An upflow anaerobic sludge blanket (UASB) reactor was successfully established to treat swine wastewater. The bacterial structure and biodiversity of activated sludge in the anaerobic bioreactor were analyzed using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) and amplified 16S rDNA restriction analysis (ARDRA). The UASB reactor was acclimatized with swine wastewater for a period of 36 days and exhibited an increase in daily COD removal rate up to 90% and methane production up to 9.5 L/day for an influent COD of 3,500 mg/L at the end of the start-up period. The reactor was then run continuously with an influent COD of 3,000–6,000 mg/L in the following two months of steady operation, reaching COD removal rate of 90–95% and methane production of 9.5–13.2 L/day respectively. The results of microbial community analysis showed a diversified and abundant bacterial structure and biodiversity during the start-up period, which then changed insignificantly in the steady operation period. The change patterns of the bacterial population function were similar to those of the bioreactor performance, indicating a close relationship between bacterial community structure and treatment efficiency.

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