Methane fermentation of dung from litter-free reared domestic animals — an optimisation study

Baykov, Bayko; Stoyanov, M.; Gugova, M. L.

doi:10.1016/0921-3449(94)00047-9

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…Anaerobic fermentation of livestock manure is practiced world wide due to several advantages such as no oxygen requirement, low sludge production and generation of methane gas for energy recovery (Baykov et al 1994;Hill and Bolte 2000). Direct discharge of digester liquor after anaerobic fermentation is detrimental to receiving waters as it contains high concentrations of organic carbon, nitrogen and phosphorus.…”

Section: Introductionmentioning

confidence: 99%

High-rate nitrogen removal from livestock manure digester liquor by combined partial nitritation–anammox process

et al. 2009

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In this study, combination of a partial nitritation reactor, using immobilized polyethylene glycol (PEG) gel carriers, and a continuous stirred granular anammox reactor was investigated for nitrogen removal from livestock manure digester liquor. Successful nitrite accumulation in the partial nitritation reactor was observed as the nitrite production rate reached 2.1 kg-N/m(3)/day under aerobic nitrogen loading rate of 3.8 kg-N/m(3)/day. Simultaneously, relatively high free ammonia concentrations (average 50 mg-NH(3)/l) depressed the activity of nitrite oxidizing bacteria with nitrate concentration never exceeding 3% of TN concentration in the effluent of the partial nitritation reactor (maximum 35.2 mg/l). High nitrogen removal rates were achieved in the granular anammox reactor with the highest removal rate being 3.12 kg-N/m(3)/day under anaerobic nitrogen loading rate of 4.1 kg-N/m(3)/day. Recalcitrant organic compounds in the digester liquor did not impair anammox reaction and the SS accumulation in the granular anammox reactor was minimal. The results of this study demonstrated that partial nitritation-anammox combination has the potential to successfully remove nitrogen from livestock manure digester liquor.

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Section: Introductionmentioning

confidence: 99%

High-rate nitrogen removal from livestock manure digester liquor by combined partial nitritation–anammox process

et al. 2009

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“…In addition, energy recovery from a large variety of wastes including swine wastewater has been developed. For these reasons, anaerobic methane fermentation has been applied for swine wastewater treatment (1)(2)(3)(4). Because methane fermentation is an anaerobic treatment, it can not remove nitrogen and phosphorus efficiently from swine wastewater, which can cause eutrophication (5).…”

mentioning

confidence: 99%

Novel partial nitritation treatment for anaerobic digestion liquor of swine wastewater using swim-bed technology

Yamamoto

Takaki

Koyama³

et al. 2006

Journal of Bioscience and Bioengineering

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“…In addition, energy recovery from a large variety of wastes including swine wastewater has been developed. For these reasons, anaerobic methane fermentation has been applied for swine wastewater treatment (Baykov et al, 1994;Hill and Bolte, 2000;Angenental et al, 2002;Sanchez et al, 2005). Because methane fermentation is an anaerobic treatment, it can not remove nitrogen and phosphorus efficiently from swine wastewater, which can cause eutrophication (Obaja et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Novel Partial Nitritation Treatment for Anaerobic Digestion Liquor of Swine Wastewater as Pretreatment for Anammox

Yamamoto¹,

Takaki²,

Koyama³

et al. 2007

proc water environ fed

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A swim-bed reactor using the biofringe acryl-fiber biomass carrier was used for partial nitritation treatment for anaerobic digestion liquor of swine wastewater. The sludge in the reactor demonstrated excellent settling properties, and the sludge volumetric index (SVI) was always about 50 ml g -1 . The mixed liquor suspended solids (MLSS) concentration was maintained above 10,000 mg l -1 with a maximum of 16,800 mg l -1 . Satisfactory and stable partial nitritation was obtained at a nitrogen loading rate (NLR) of 1.9 kg-N m -3 d -1 without any operational control. Only a little nitrate was produced almost during the whole operational period and the nitrite to total oxidized nitrogen ratio (NO 2 -N / (NO 2 -N + NO 3 -N)) was always above 95%. In addition, the influence of temperature on partial nitritation efficiencies was also investigated and noncontrolled efficiencies were maintained stably between 15℃ and 30℃ at a NLR of 1.9 kg-N m -3 d -1 , but suddenly deteriorated when the temperature fell below 15℃. Nitrite oxidizing bacteria were inhibited by free ammonia and free nitric acid, which prevented the conversion of nitrite to nitrate and the inhibition due to free nitric acid weaken with a decrease in temperature. It was apparent that these phenomena were crucial to the control of partial nitritation treatment.

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Methane fermentation of dung from litter-free reared domestic animals — an optimisation study

Cited by 5 publications

References 3 publications

High-rate nitrogen removal from livestock manure digester liquor by combined partial nitritation–anammox process

High-rate nitrogen removal from livestock manure digester liquor by combined partial nitritation–anammox process

Novel partial nitritation treatment for anaerobic digestion liquor of swine wastewater using swim-bed technology

Novel Partial Nitritation Treatment for Anaerobic Digestion Liquor of Swine Wastewater as Pretreatment for Anammox

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