scholarly journals Study of a Two-phase Methane Fermentation System Equipped with Solubilization Treatment

2013 ◽  
Vol 42 (4) ◽  
pp. 235-244
Author(s):  
Kazumasa TONOOKA ◽  
Takuya EBISAWA ◽  
Akihiro NAGANO ◽  
Akihiro OHNISHI ◽  
Naoshi FUJIMOTO ◽  
...  
Keyword(s):  
Methane Fermentation ◽  
Two Phase ◽  
Fermentation System

Survey of Combined Hydrogen-Methane Production in Anaerobic Baffled Reactor (ABR)

2012 ◽  
Vol 550-553 ◽  
pp. 3180-3183 ◽  
Author(s):  
Guo Chen Zheng ◽  
Jian Zheng Li ◽  
Wei Li ◽  
Zhu Jun Tian ◽  
Shuang Shi Dong ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Phase Separation ◽  
Environmental Pollution ◽  
Methane Production ◽  
Biological Treatment ◽  
Methane Fermentation ◽  
Anaerobic Reactor ◽  
Fermentation System ◽  
Anaerobic Baffled Reactor ◽  
Stage Process

Anaerobic fermentative technology is an important route to solving environmental pollution and resources problems. Combined hydrogen and methane production in a two-stage process is a concept which has been developed in recent years Anaerobic biological treatment organic wastewater can produce large amounts of hydrogen and methane，which can be used as energy carrier. At present，the research focusing on the adjustment of fermentation hydrogen-methane production has been conducted. Furthermore, the simultaneous hydrogen-methane production was tested and optimized. However, it lacked combined hydrogen-methane production in an anaerobic reactor in literature so far. Based on preview experiment, the paper studied the simultaneous hydrogen-methane fermentation in an anaerobic baffled reactor (ABR) system. ABR has the advantage of biomass phase separation and integration of acidogenic and methanogenic processes to simultaneously conduct hydrogen-methane production during wastewater treatment. Through deep biohydrogen production, it can enhance the activity of hydrogen-producing acetogens (HPA) and the efficiencies of the combined hydrogen-methane fermentation system. It showed to enhance the activity of HPA was the key to the combined hydrogen-methane production.

Field test of methane fermentation system for treating swine wastes

2002 ◽  
Vol 45 (12) ◽  
pp. 103-112 ◽  
Author(s):  
N. Kataoka ◽  
T. Suzuki ◽  
K. Ishida ◽  
N. Yamada ◽  
N. Kurata ◽  
...  
Keyword(s):  
Water Content ◽  
Field Test ◽  
Biogas Production ◽  
Screw Press ◽  
Methane Content ◽  
Test Plant ◽  
Methane Fermentation ◽  
Fermentation System ◽  
Ignition Loss ◽  
Pre Treatment

A methane fermentation system for treating swine wastes was developed and successfully demonstrated in a field test plant (0.5 m3/d). The system was composed of a screw-press dehydrator, a methanogenic digester, a sludge separator, an oxidation ditch (OD) and composting equipment. A performance evaluation was carried out regarding physical pre-treatment using the screw-press dehydrator, methane fermentation for pre-treated slurry, and post-treatment for digested effluent by OD. Total solids (TS) and chemical oxygen demand (CODCr) removal by the screw-press pre-treatment were 38% and 22%, respectively. Properties of the screenings were as follows: water content 57%, ignition loss 93%, specific gravity 0.33. The pretreated strong slurry was digested under mesophilic conditions. Digestion gas (biogas) production rate was 25 m3/m3-slurry (NTP) and methane content of the biogas was 67%. CODCr removal of 65% with methane fermentation treatment of the slurry operating at 35°C was observed. No inhibition of methane fermentation reaction occurred at the NH4+-N concentration of 3,000 mg/l or less during methane fermentation by the system. Mass balance from the present pilot-scale study showed that 1m3 of mixture of excrement and urine of swine waste (TS 90 kg/m3) was biologically converted to 25 m3/m3-slurry (NTP) of biogas (methane content 67%), 100 kg of compost (water content 40%, ignition loss 75%), and 0.80 m3 of treated water (SS 30-70 mg/l).

Rapid-rate thermophilic, single-stage and two-phase methane fermentation of synfuel-industry wastewaters

2001 ◽  
Vol 43 (1) ◽  
pp. 35-42
Author(s):  
S. Ghosh ◽  
D. Jerger ◽  
M. P. Henry ◽  
A. Sajjad
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Hydrolytic Degradation ◽  
Single Stage ◽  
Methane Yield ◽  
Residence Times ◽  
Rapid Rate ◽  
Methane Fermentation ◽  
Two Phase ◽  
End Products

Thermophilic (55°C) anaerobic digestion of wastewaters from wet carbonization of Minnesota peat was conducted in a simple, upflow digester at an HRT of one day to provide a methane yield of 0.20 SCM/kg VS added and a BOD5 reduction of 85%. Carbonization of Maine peat conducted for a much longer duration of thermal treatment produced recalcitrant and potentially toxic end products that reduced the biodegradability of wastewaters. Methane fermentation of the Maine-peat wet-carbonization waste was inhibited at an HRT of one day in the single-stage digester. However, two-phase digestion with separate acid-phase fermentation to promote hydrolytic degradation of toxic end products followed by separate methane fermentation at an HRT of 2 days exhibited a methane yield of 0.21 SCM/kg VS added and a BOD5 reduction of 76%. Volatile fatty acids profiles along the depths digesting cultures indicated that single-stage and two-phase digestion could be accomplished at one-half the reactor residence times (one day for single-stage and three days for two-phase) used in this research.

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