Denitrification with Biogas as External Carbon Source

Werner, Michael; Kayser, R.

doi:10.2166/wst.1991.0520

Cited by 64 publications

(23 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Methanol, ethanol, acetic acid has been used for this purpose, with the drawback of their additional costs. Methane, a free, endogenous carbon source has been underestimated, as few research studies have been published on that subject (Davies 1973;Sollo et al 1976;Rhee & Fush 1978;Werner & Kayser 1991;Thalasso et al 1995;Houbron et al 1999;Rajapakse & Scutt 1999;Costa et al 2000;Eisentraeger et al 2001;Santos et al 2004;Islas-Lima et al 2004).…”

Section: Biogas As Substrate (Electron Donor) For Denitrification Of mentioning

confidence: 99%

“…Even if some discussion still prevails on the biochemical pathways and the denitrification rates (Mason 1977;Costa et al 2000;Islas-Lima et al 2004), there is enough evidence that methane may be used as external carbon source for denitrification, achieving removal rates similar to those obtain with classical substrates, such as methanol or ethanol (Werner & Kayser 1991;Thalasso et al 1995;Houbron et al 1999). The requirements for a proper denitrification process with methane are a good gas transfer to the liquid phase and a limited concentration of dissolved oxygen, around 1 mg/L (Werner & Kayser 1991; Thalasso et al 1995;Houbron et al 1999;Costa et al 2000).…”

Section: Biogas As Substrate (Electron Donor) For Denitrification Of mentioning

confidence: 99%

See 1 more Smart Citation

Treatment of Biogas Produced in Anaerobic Reactors for Domestic Wastewater: Odor Control and Energy/Resource Recovery

Noyola¹,

Morgan-Sagastume²,

López-Hernández³

2006

Rev Environ Sci Biotechnol

178

View full text Add to dashboard Cite

Anaerobic municipal wastewater treatment in developing countries has important potential applications considering their huge lack of sanitation infrastructure and their advantageous climatic conditions. At present, among the obstacles that this technology encounters, odor control and biogas utilization or disposal should be properly addressed. In fact, in most of small and medium size anaerobic municipal treatment plants, biogas is just vented, transferring pollution from water to the atmosphere, contributing to the greenhouse gas inventory. Anaerobic municipal sewage treatment should not be considered as an energy producer, unless a significant wastewater flow is treated. In these cases, more than half of the methane produced is dissolved and lost in the effluent so yield values will be between 0.08 and 0.18 N m 3 CH 4 /kg COD removed. Diverse technologies for odor control and biogas cleaning are currently available. High pollutant concentrations may be treated with physical-chemical methods, while biological processes are used mainly for odor control to prevent negative impacts on the treatment facilities or nearby areas. In general terms, biogas treatment is accomplished by physico-chemical methods, scrubbing being extensively used for H 2 S and CO 2 removal. However, dilution (venting) has been an extensive disposal method in some small-and medium-size anaerobic plants treating municipal wastewaters. Simple technologies, such as biofilters, should be developed in order to avoid this practice, matching with the simplicity of anaerobic wastewater treatment processes. In any case, design and specification of biogas handling system should consider safety standards. Resource recovery can be added to anaerobic sewage treatment if methane is used as electron donor for denitrification and nitrogen control purposes. This would result in a reduction of operational cost and in an additional advantage for the application of anaerobic sewage treatment. In developing countries, biogas conversion to energy may apply for the clean development mechanism (CDM) of the Kyoto Protocol. This would increase the economic feasibility of the project through the marketing of certified emission reductions (CERs).

show abstract

Section: Biogas As Substrate (Electron Donor) For Denitrification Of mentioning

confidence: 99%

Section: Biogas As Substrate (Electron Donor) For Denitrification Of mentioning

confidence: 99%

Treatment of Biogas Produced in Anaerobic Reactors for Domestic Wastewater: Odor Control and Energy/Resource Recovery

Noyola¹,

Morgan-Sagastume²,

López-Hernández³

2006

Rev Environ Sci Biotechnol

178

View full text Add to dashboard Cite

show abstract

“…C/N available ratio = C available / N available (3) This number was low in compare with those in previous studies [1,9]. The carbon source might not enough for the system then the denitrification performance was not good and microbial density was low.…”

Section: Resultsmentioning

confidence: 75%

“…Denitrification is an anoxic process and is suppressed in the presence of oxygen [1], however, it is an unomissible factor in aerobic methane oxidation couple to denitrification (AMO-D) process, which has been increasingly become an attractive method for denitrification using methane gas [2]. The AMO-D process must be performed in a two-stage process with aerobic methanotrophic bacteria producing metabolites, which are used as hydrogen donor by denitrifier bacteria in anoxic areas [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

Combination of Methane Oxidation and Denitrification Process in a Two-Stage Bioreactor

Thu¹

2018

JST

View full text Add to dashboard Cite

The importance of a combination of methane oxidation and denitrification processes in a two-stage bioreactor was investigated for the removal of nitrate using methane gas. In the configuration I, methane and oxygen were supplied separately to two columns of the two-stage bioreactor, an oxic column and an anoxic column. The nitrate removal efficiency was around 25 % and nitrite presented in the liquid medium, showing that the denitrification process was not complete. In the configuration II, methane and oxygen were supplied together to one column of the two-stage bioreactor, better results were achieved. Nitrate removal efficiency increased to almost 100 %, no nitrite was found in the liquid medium. The methane oxidation and the denitrification processes seemed to be happened simultaneously in one column of the two-stage bioreactor and demonstrated its advantages. Methane utilized concentration in the medium of the methane oxidation column increased from 1 to 2.1 mg/L, which resulted in more soluble organic carbon was created and supplied for denitrifiers. The C/N utilized ratio was lower in the Configuration II showing that the aerobic methane oxidation coupled to denitrification (AMO-D) achieved higher efficiency when methane and oxygen were supplied together.

show abstract

“…However, more recent studies considered the aerobic oxidation of methane associated with denitrification process as an alternative for organic carbon supply, which was necessary for nitrogen oxides removal in low organic concentration waters. (Werner and Kayser, 1991;Jewell et al, 1992;Thalasso et al, 1997;Rajapakse and Scutt, 1999;Houbron et al, 1999;Costa et al, 2000;Knowles, 2005;Waki et al, 2005). Methane anaerobic oxidation studies have related this process to sulfate reduction (Iversen and Jorgensen, 1985;Valentine and Reeburgh, 2000;Nauhaus et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Denitrification coupled with methane anoxic oxidation and microbial community involved identification

Cuba

Duarte

Saavedra

et al. 2011

Braz. arch. biol. technol.

View full text Add to dashboard Cite

show abstract

Denitrification with Biogas as External Carbon Source

Cited by 64 publications

References 0 publications

Treatment of Biogas Produced in Anaerobic Reactors for Domestic Wastewater: Odor Control and Energy/Resource Recovery

Treatment of Biogas Produced in Anaerobic Reactors for Domestic Wastewater: Odor Control and Energy/Resource Recovery

Combination of Methane Oxidation and Denitrification Process in a Two-Stage Bioreactor

Denitrification coupled with methane anoxic oxidation and microbial community involved identification

Contact Info

Product

Resources

About