Ammonia stripping for enhanced biomethanization of piggery wastewater

Zhang, Lei; Lee, Yong-Woo; Jahng, Deokjin

doi:10.1016/j.jhazmat.2011.10.049

Cited by 84 publications

(87 citation statements)

References 18 publications

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“…Over the past decade, several methods have been developed to alleviate this phenomenon, including ammonia stripping [90,91]; in situ ammonia removal through biogas re-circulation [18]; biological denitrification [92]; precipitation with cations, effective in reducing NH4-N by up to 90%, as calcite and struvite [36,93,94]; electrochemical conversion [95]; microwave radiation [96] and ultrasound [97]. Evaluating the environmental benefits against the costs involved, the in situ stripping method has been reported as more sustainable [18], especially in comparison to chemical precipitation route, which introduces new pollutant from addition of reagent [96].…”

Section: Post-digestion Best Practicementioning

confidence: 99%

Emerging perspectives on environmental burden minimisation initiatives from anaerobic digestion technologies for community scale biomass valorisation

Tiwary

Williams

Pant

et al. 2015

Renewable and Sustainable Energy Reviews

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This paper provides an extensive review of anaerobic digestion (AD) systems, with a specific focus on community scale digesters for urban applications, processing either municipal organic waste exclusively or as mix feed. Emphasis is placed on reducing the systems scale environmental impact of AD technologies, including pre-and post-treatment stages, alongside biogas production. Developments to-date in AD system research in Europe and in the Asia region have been compared, providing a comprehensive evaluation of current practice, elucidating the areas of further potentials.The scope of this review is two-fold -one, covering AD technologies including a cohort of simple and integrated wet and dry systems, which can be operated as continuous flow designs in single-or multi-stages. Two, focusing more on practices in digestate handling that minimise environmental impacts arising from their storage and land application. From an environmental perspective, we note the following trends emerging in the literature for processing urban waste that need further exploitation: dry AD (60-85% moisture) is suitable for low organic loads, mainly owing to resource savings in terms of water usage; co-digestion has shown better buffering capability, especially for two-stage digestion of food-based feed stocks; separating the digestate into liquid/solid fractions is effective for handling postdigestion emissions, mainly for mitigating ammonia volatilisation to air and phosphate leaching to soil.We report responses to a survey, conducted for this review, highlighting the contemporary issues and challenges -with particular focus on the operational, social and management issues from an Indian perspective. There is need for follow-up of running plants to ensure their environmental performance. Such initiatives will have to consider managing of pollution footprints from AD, alongside the current drive for its widespread implementation for two incentives: greenhouse gas mitigation and fossil-fuel independence.

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Section: Post-digestion Best Practicementioning

confidence: 99%

Emerging perspectives on environmental burden minimisation initiatives from anaerobic digestion technologies for community scale biomass valorisation

Tiwary

Williams

Pant

et al. 2015

Renewable and Sustainable Energy Reviews

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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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confidence: 99%

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

Serna‐Maza

Heaven

Banks

2014

Bioresource Technology

111

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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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“…Previous works showed that the pH value, temperature, flow rate and flow time influenced the nitrogen removal in air stripping [15,20]. In this work, the initial pH was 8.3-8.5, which can be regulated to 9.0 or 10.5 by NaOH and HCl; however, because of the very high initial potassium concentration in the wastewater, the addition of NaOH would lead to the microalgae experiencing salinity stress.…”

Section: Air Stripping For Ammonia Removalmentioning

confidence: 89%

Nitrogen and Biomass Recovery from Low Carbon to Nitrogen Ratio Wastewater by Combing Air Stripping and Microalgae Cultivation

Ma¹,

Lu²,

Zhang³

et al. 2016

JRST

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an air stripping-microalgae cultivation system was proposed to recover nitrogen and produce biomass from biogas fertilizer production wastewater. air stripping was firstly used for reducing the nitrogen to low levels. Then microalgae were used for absorbing the residual nitrogen. Results showed that the nitrogen removal reached 95.0%, with a microalgae productivity and biomass yield of 0.21 (g/L/d) and 4.29 (g-biomass/g-nitrogen), respectively. For the system, 87.7% of the total nitrogen was recycled, from which 83.9% came from air stripping and 3.8% from microalgae absorption. This system enables carbon-emission reduction, wastewater treatment and the promotion of nitrogen recovery.

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Ammonia stripping for enhanced biomethanization of piggery wastewater

Cited by 84 publications

References 18 publications

Emerging perspectives on environmental burden minimisation initiatives from anaerobic digestion technologies for community scale biomass valorisation

Emerging perspectives on environmental burden minimisation initiatives from anaerobic digestion technologies for community scale biomass valorisation

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

Nitrogen and Biomass Recovery from Low Carbon to Nitrogen Ratio Wastewater by Combing Air Stripping and Microalgae Cultivation

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