Removal of nitrogen from swine manure wastewaters by ammonia stripping

Liao, Ping; Chen, A.; Lo, K.V.

doi:10.1016/0960-8524(95)00105-0

Cited by 189 publications

(95 citation statements)

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“…means that the 10% removal would be an effective means to avoid ammonia inhibition. For higher ammonia removal, which can be estimated at the given conditions (pH 8.5, 688C) to about 30% (Katehis et al, 1998;Liao et al, 1995), a higher gas stream would be necessary in order to enhance the contact between the gas and liquid phases. Applying this removal ratio, the total ammonia and the free ammonia concentration could be lowered to 1.18 and 0.33 g N/L, respectively.…”

Section: Discussionmentioning

confidence: 99%

A novel process configuration for anaerobic digestion of source‐sorted household waste using hyper‐thermophilic post‐treatment

Hartmann

Ahring

2005

Biotech & Bioengineering

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A novel reactor configuration was investigated for anaerobic digestion (AD) of the organic fraction of municipal solid waste (OFMSW). An anaerobic hyper-thermophilic (68 degrees C) reactor R68 was implemented as a post-treatment step for the effluent of a thermophilic reactor R1 (55 degrees C) in order to enhance hydrolysis of recalcitrant organic matter, improve sanitation and ease the stripping of ammonia from the reactor. The efficiency of the combined system was studied in terms of methane yield, volatile solids (VS) reduction, and volatile fatty acid (VFA) production at different hydraulic retention times (HRT). A single-stage thermophilic (55 degrees C) reactor R2 was used as control. VS reduction and biogas yield of the combined system was 78-89% and 640-790 mL/g VS, respectively. While the VS reduction in the combined system was up to 7% higher than in the single-stage treatment, no increase in methane yield was observed. Shifting the HRT of the hyper-thermophilic reactor from 5 days to 3 days resulted in a drop in the methanogenic activity in the hydrolysis reactor to a minimum. Operation of R68 at HRTs of 24-48 h was sufficient to achieve high VS conversion into VFAs. Removal of pathogens was enhanced by the hyper-thermophilic post-treatment. 7% of the ammonia load was removed in the hyper-thermophilic reactor with a flow of headspace gas through the reactor equivalent to four times the biogas flow produced in reactor R1.

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Section: Discussionmentioning

confidence: 99%

A novel process configuration for anaerobic digestion of source‐sorted household waste using hyper‐thermophilic post‐treatment

Hartmann

Ahring

2005

Biotech & Bioengineering

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“…따라서 발생되는 질소성분을 제거하는 다양한 공법도 연 구 ․ 개발되었고 (Clifford et al, 1992;Liao et al, 1995), - (Yadav et al, 2000), 과다 시용 은 잉여 양분의 이동으로 수질을 오염시키기 때문에 적량 시용이 중요하다 (Murayama et al, 2001). 원예작물에 대 한 SCB 액비 시험은 노지 재배 배추에서 기비 기준 (Lim et al, 2009b)이 설정되었고 수량과 생육에 대한 SCB 액비 효과는 고추 (Lim et al, 2008)와 배추 (Lim et al, 2009a) 및 토마토 (Park et al, 2010) …”

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Effect of Pig Slurry Fertigation on Soil Chemical Properties and Growth and Development of Cucumber (Cucumis sativus L.)

Park¹,

Lim²,

Lee³

et al. 2011

Korean Journal of Soil Science and Fertilizer

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This study was conducted to evaluate fertigation effects of pig slurry (PS) and chemical fertilizer (CF) in 9~2.0%). The SCBLF treatments showed higher figure in the soil pH than that of the CF treatment, while EC and the content of NO₃-N were higher in the CF treatment than the former. The content of exchangeable K was higher in the plot treated with 52 mg L -1 SCBLF, and there were no significant differences in the content of Ca and Mg between the treatments. In conclusion, it is suggested that the application of liquefied manure made from pig slurry may be able to replace the use of chemical fertilizer in nitrogen and potassium.

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“…Co-digestion to increase the C/N ratio is also possible, but depends on the availability of a suitable low nitrogen co-substrate. Reducing the ammonia in the digester or its feed are also possible solutions.The application of ammonia stripping to the feedstock (pre-digestion) has been tested with piggery and poultry wastes (Zhang et al, 2011, Liao et al, 1995, Bonmati and Flotats, 2003, Gangagni Rao et al, 2008. Removal after first stage fermentation has been tested when treating abattoir, municipal and sewage sludge wastes (Resch et al, 2011, Nakashimada et al, 2008, Yabu et al, 2011.…”

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Ammonia removal in food waste anaerobic digestion using a side-stream stripping process

Serna‐Maza

Heaven

Banks

2014

Bioresource Technology

110

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Three 35-L anaerobic digesters fed on source segregated food waste were coupled to side-stream ammonia stripping columns and operated semi-continuously over 300 days, with results in terms of performance and stability compared to those of a control digester without stripping. Biogas was used as the stripping medium, and the columns were operated under different conditions of temperature (55, 70, 85 ⁰C), pH (unadjusted and pH 10), and RT (2 to 5 days). To reduce digester TAN concentrations to a useful level a high temperature (≥70⁰C) and a pH of 10 were needed; under these conditions 48% of the TAN was removed over a 138-day period without any detrimental effects on digester performance. Other effects of the stripping process were an overall reduction in digestate organic nitrogen-containing fraction compared to the control and a recovery in the acetoclastic pathway when TAN concentration was 1770 ± 20 mg kg -1 . Keywords IntroductionThe source segregation, separate collection and subsequent anaerobic digestion of food waste can help to reduce the organic fraction of municipal solid waste for disposal and, in some cases, help governments to meet the targets of the EU Directive on the landfilling of waste (1999/31/EC). Importantly, it also offers a method of reclaiming potential energy in the waste in the form of a fuel gas, and opens up a route by which nutrients can be recycled back to land. This has advantages even compared to incineration for energy recovery, as the high moisture content of food waste negates much of the energy gain and in thermal processing most nutrients are lost. Digestion may therefore offer a more sustainable route to resource recovery compared to other waste treatment technologies that are less suited to dealing with this high moisture fraction. Anaerobic digestion of food waste is not without difficulties, however, mainly associated with its high protein content. On hydrolysis this releases ammoniacal nitrogen which, although essential for the growth of anaerobic microorganisms, can lead to free ammonia concentrations that are inhibitory to the digestion process. The ammonia inhibits the methanogenic archaea, in particular the acetoclastic methanogens (Kayhanian, 1999, Chen et al., 2008, Liu and Sung, 2002, Prochazka et al., 2012, Angelidaki and Ahring, 1993. The result is operational instability, a decrease in biogas production, and in the worst cases failure of digestion. To some extent these problems have been resolved at mesophilic temperatures through stimulation of the hydrogenotrophic metabolic pathway by the addition of selenium and cobalt, both of which are commonly deficient in food waste (Climenhaga and Banks, 2008). This strategy has allowed stable digestion of food waste at high organic loading rates (OLR) (> 5 kg VS m -3 day -1 ) and total ammoniacal nitrogen (TAN) concentrations > 6 g l -1 (Banks et al., 2012). At temperatures in the thermophilic range the toxic threshold is reduced as the equilibrium moves towards free ammonia, and under these conditions trace e...

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Removal of nitrogen from swine manure wastewaters by ammonia stripping

Cited by 189 publications

References 1 publication

A novel process configuration for anaerobic digestion of source‐sorted household waste using hyper‐thermophilic post‐treatment

A novel process configuration for anaerobic digestion of source‐sorted household waste using hyper‐thermophilic post‐treatment

Effect of Pig Slurry Fertigation on Soil Chemical Properties and Growth and Development of Cucumber (Cucumis sativus L.)

Ammonia removal in food waste anaerobic digestion using a side-stream stripping process

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