Anaerobic treatment of baker's yeast effluent using a hybrid digester with polyurethane as support material

1993 ◽  
Vol 15 (7) ◽  
pp. 755-760 ◽  
Author(s):  
T. J. Britz ◽  
M. Van Der Merwe
Keyword(s):  
Anaerobic Treatment ◽  
Baker’S Yeast ◽  
Baker's Yeast ◽  
Support Material

The effect of anaerobic pre-treatment on the inert soluble COD of fermentation industry effluents

1995 ◽  
Vol 32 (12) ◽  
pp. 35-42 ◽  
Author(s):  
G. Yilmaz ◽  
I. Öztürk
Keyword(s):  
Treatment Plant ◽  
Anaerobic Treatment ◽  
Baker’S Yeast ◽  
Full Scale ◽  
Operating Conditions ◽  
Baker's Yeast ◽  
Series Of Experiments ◽  
Pre Treatment ◽  
Process Wastewater ◽  
Volumetric Loading

The objective of this study is to determine the inert soluble COD of wastewaters from the fermentation industry. In this context, a series of experiments were performed for various effluents from baker's yeast industry including raw process wastewater, anaerobic pre-treatment plant effluents, domestic and washing waters mixture. The inert COD ratio (SISO) for the raw effluents from baker's yeast industry was determined as 0.1. This ratio was in the range of 0.20 to 0.30 for the anaerobically pre-treated effluents. TheSISO ratios for the wastewater simulating the effluent of the existing full-scale aerobic treatment plant have varied from 0.18 to 0.48. Such a large variation has been originated from the operating conditions of the existing full-scale anaerobic treatment plants. The higher volumetric loading rates and shorter sludge retention times correspond the lower SISO ratios for the full-scale anaerobic treatment systems in general.

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

Common anaerobic treatability of pharmaceutical and yeast industry wastewater

1998 ◽  
Vol 38 (4-5) ◽  
pp. 37-44
Author(s):  
B. Gulmez ◽  
I. Ozturk ◽  
K. Alp ◽  
O. A. Arikan
Keyword(s):  
Experimental Study ◽  
Anaerobic Treatment ◽  
Baker’S Yeast ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Baker's Yeast ◽  
Maximum Inhibition ◽  
Aeration Process ◽  
Anaerobic Sludge Blanket ◽  
Industry Wastewater

The purpose of this study is to demonstrate the feasibility of anaerobic treatment of pharmaceutical and baker's yeast industry effluents in a joint treatment system. Anaerobic treatability studies have been performed in a lab-scale upflow anaerobic sludge blanket reactor (UASBR). The experimental study has been carried out for 333 days. The influent COD's during the experimental study were about 10,000 mg/l. Pharmaceutical wastewater has a 5% of inhibition on the COD removals at the dilution rate of 1/100 or more in the joint anaerobic treatment with baker's yeast industry effluents. Maximum inhibition of 10% on the average was observed when the system was characterized with acclimation periods. The study has shown that, following the solvent extraction with pre-aeration process, a common anaerobic treatment can be applied to baker's yeast industry wastewater and to pharmaceutical industry effluents.

Anaerobic Treatment of the High Strength Wastes from the Yeast Industry

1993 ◽  
Vol 28 (2) ◽  
pp. 199-209 ◽  
Author(s):  
T. Çiftçi ◽  
I. Öztürk
Keyword(s):  
Biogas Production ◽  
Treatment Plant ◽  
High Strength ◽  
Anaerobic Treatment ◽  
Baker’S Yeast ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Baker's Yeast ◽  
Second Stage ◽  
Anaerobic Reactors

This paper presents the full-scale anaerobic treatment results from a fermentation plant producing baker's yeast from sugar beet molasses. The process of baker's yeast production generates high strength industrial effluents with a chemical oxygen demand (GOD) of 10 000-30 000 mg/liter. In addition to the sugar containing substances sulphur and nitrogen containing substances are added to the batch processes to promote cell growth and to control pH. This results in rather high concentrations of sulphate 0000-2700 mg/l) and ammonia (400-900 mg/l) in the wastewater. The treatment plant at Pakmaya Izmit Factory has two different processes: anaerobic first-stage treatment and aerobic second stage treatment. The anaerobic first-stage treatment system includes a buffer tank, an acid reactor, two methane reactors, lamella separators, a gas storage tank and gas burning facilities. The anaerobic reactors were constructed as upflow anaerobic sludge blanket reactors (UASBR) with internal sludge recirculation facilities. The anaerobic reactors have been operating in series mode at mesophilic temperature ranges. Long term Organic Loading Rates (OLR) in the acid, the first and the second stage methane reactors have been averaging 9.8, 8.6 and 3 kg COD/m3·d respectively. Average COD removal is 75 percent in the anaerobic pretreatment stage. Average biogas production is 8000 m3/d, corresponding to a biogas conversion yield of 0.6 m3 per kg COD removed and it is equivalent to a netbioenergy recovery of 40 000 kWh/d.

Toxicity assessment on combined biological treatment of pharmaceutical industry effluents

2002 ◽  
Vol 45 (12) ◽  
pp. 135-142 ◽  
Author(s):  
B. Inanc ◽  
B. Calli ◽  
K. Alp ◽  
F. Ciner ◽  
B. Mertoglu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Pharmaceutical Industry ◽  
Biogas Production ◽  
Treatment Plan ◽  
Treatment Plant ◽  
Anaerobic Treatment ◽  
Baker’S Yeast ◽  
Anaerobic Sludge ◽  
Baker's Yeast ◽  
Methanogenic Activity

This paper describes the wastewater characterization and aerobic/anaerobic treatability (oxygen uptake rate and biogas production measurement) of chemical-synthesis based pharmaceutical industry effluents in a nearby baker's yeast industry treatment plant. Preliminary experiments by the industry had indicated strong anaerobic toxicity. On the other hand, aerobic treatability was also uncertain due to complexity and unknown composition of the wastewater. The work in this study has indicated that the effluents of the pharmaceutical industry can be treated without toxicity in the aerobic stage of the treatment plant. Methanogenic activity tests with anaerobic sludge from the anaerobic treatment stage of the wastewater treatment plant and acetate as substrate have confirmed the strong toxicity, while showing that 30 min aeration or coagulation with an alum dose of 300 mg/l is sufficient for reducing the toxicity almost completely. Powdered activated carbon, lime and ferric chloride (100-1,000 mg/l) had no effect on reduction of the toxicity. Consequently, the pharmaceutical industry was recommended to treat its effluents in the anaerobic stage of the nearby baker's yeast industry wastewater treatment plan at which there will be no VOC emission and toxicity problem, provided that pretreatment is done.

Anaerobic treatment of baker's yeast wastewater: II. Sulfate removal

Biomass ◽  
1990 ◽  
Vol 23 (1) ◽  
pp. 25-37 ◽  
Author(s):  
K.V. Lo ◽  
A. Chen ◽  
P.H. Liao
Keyword(s):  
Anaerobic Treatment ◽  
Baker’S Yeast ◽  
Baker's Yeast ◽  
Sulfate Removal ◽  
Yeast Wastewater

A mathematical model for the anaerobic treatment of Baker's yeast effluents

2001 ◽  
Vol 21 (1) ◽  
pp. 99-103 ◽  
Author(s):  
Nuran Deveci ◽  
Gülen Çiftçi
Keyword(s):  
Mathematical Model ◽  
Anaerobic Treatment ◽  
Baker’S Yeast ◽  
Baker's Yeast
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