Struvite precipitation for ammonium removal from anaerobically treated effluents

Escudero, Ania; Blanco, F.; Lacalle, Arrate; Pinto, M.

doi:10.1016/j.jece.2015.01.004

Cited by 51 publications

(29 citation statements)

References 38 publications

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“…This reaction was less efficient than the results presented by other authors. Nitrogen removal efficiency in landfill leachate reached about 80% (Huang et al, 2014) and anaerobically-treated wastewater reached 95% (Escudero et al, 2015). The low efficiency of nitrogen removal may be the result of calcium ions (around 0.01 mol$L À1 ).…”

Section: Nitrogen In Digestion Fluidmentioning

confidence: 99%

“…The low efficiency of nitrogen removal may be the result of calcium ions (around 0.01 mol$L À1 ). Escudero et al showed that calcium ions also precipitated in the conditions required for struvite formation (Escudero et al, 2015). Thus, the presence of calcium and other cations may result in reduced ammonium removal efficiency.…”

Section: Nitrogen In Digestion Fluidmentioning

confidence: 99%

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The influence of different pretreatment methods on biogas production from Jatropha curcas oil cake

Jabłoński

Kułażyński

Sikora

et al. 2017

Journal of Environmental Management

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Section: Nitrogen In Digestion Fluidmentioning

confidence: 99%

Section: Nitrogen In Digestion Fluidmentioning

confidence: 99%

The influence of different pretreatment methods on biogas production from Jatropha curcas oil cake

Jabłoński

Kułażyński

Sikora

et al. 2017

Journal of Environmental Management

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“…Due to this, various low-cost materials such as seawater [25], bittern [26], and magnesite (MgCO 3 ) [27] are considered as a cheap alternative source of Mg +2 ions. The molar ratio of N : P in digestate varies from 2 : 1 to 4 : 1 [28], and in struvite it is 1:1. Therefore, the leachate after struvite precipitation still contains a large number of ammonium ions [19,29].…”

Section: Introductionmentioning

confidence: 99%

Ammonium Sulphate from a Bio-Refinery System as a Fertilizer—Agronomic and Economic Effectiveness on the Farm Scale

et al. 2019

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This paper presents the results of a pot experiment aimed at the assessment of the agronomic and economic effectiveness of ammonium sulphate from an agro bio-refinery (Bio-AS). The Bio-AS was obtained by means of the ammonia stripping process from effluent after struvite precipitation from a liquid fraction of digestate. The agronomic effectiveness of Bio-AS in a pot experiment with maize and grass in two different soils, silty loam (SL) and loamy sand (LS), was investigated. The fertilising effect of Bio-AS was compared to commercial ammonium sulphate fertilizer (Com-AS) and control treatment (without fertilisation). The crop yields were found to depend on both soil type and nitrogen treatment. Crop yields produced under Bio-AS and Com-AS exceeded those under control treatments, respectively for SL and LS soils, by 88% and 125% for maize and 73% and 94% for grass. Crop yields under Bio-AS were similar to those under the Com-AS treatment. The fertilizer use of Bio-AS affected the chemical composition of plants and soil properties similarly as Com-AS. This suggests that Bio-AS from a bio-refinery can replace industrial ammonium sulphate, resulting in both economic and environmental benefits.Energies 2019, 12, 4721 2 of 15 ammonia (NH 3 ), nitrous oxide (N 2 O), and hydrogen sulphide (H 2 S) to the atmosphere [8,9]. Due to intensification of animal production observed in EU agriculture, the European Commission regulated the use of organic fertilizers in the Nitrates Directive adopted on 12 December 1991. It aimed at water quality protection across Europe by prevention of pollution of the ground and surface waters with nitrates from agricultural sources and by promoting the use of good farming practices. One of the major restrictions was the limitation of the amount of nitrogen applied, taking into account the crop needs, all nitrogen inputs and soil nitrogen supply, as well as the maximum amount of livestock manure to be applied (corresponding to 170 kg nitrogen per hectare per year) [10]. The Dutch government negotiated special derogation allowing use of 250 kg·N·ha −1 in organic fertilizers under the condition of more efficient use of nitrogen from animal sources, which is included in the Dutch Manure Policy [11] and also encompasses regulations limiting the use of P from organic fertilizers. Many studies report considerable farm-gate N surplus for dairy farms per unit area, for example 138 kg N ha −1 year −1 in Sweden, 223 kg·N·ha −1 ·year −1 in the Netherlands, and 240 kg·N·ha −1 ·year −1 in Denmark [12]. So far, the dominant method of processing of animal waste has been anaerobic digestion. The process results in the production of biogas and digestate [13]. Biological conversion of organic compounds during anaerobic digestion considerably reduces the odour as compared to untreated manures [14][15][16]. Both the nitrogen and phosphorus content in the digestate are comparable with untreated manure; however, in contrast to livestock manures, the digestate is characterized by the presence of the nutrients in solub...

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“…Chemical and chemical-physical processes for ammonia removal can be rather classified as recovery techniques because they give rise to the precipitation of, e.g. struvite (MgNH 4 PO 4 ·6H 2 O) from raw digestate or its supernatant [13]. However, such recovery techniques have their drawbacks, such as high cost of chemicals and the need to strictly control the pH [14].…”

Section: Introductionmentioning

confidence: 99%

Stripping and scrubbing of ammonium using common fractionating columns to prove ammonium inhibition during anaerobic digestion

Ghyselbrecht

Monballiu

Somers

et al. 2018

Int J Energy Environ Eng

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Anaerobic digestion to produce biogas is generally considered as one of the most sustainable technologies for the production of renewable energy. During this microbial process, organically bound nitrogen is released as ammonium that ends up in the digestate and finally may inhibit the process. In this study, it is investigated if ammonium can be removed and recovered out of the liquid fraction of a thermophilic digestate from a potato processor. This is achieved at laboratory scale through an easy and self-designed stripping and scrubbing process using Vigreux and Dufton columns, which are commonly used laboratory fractionating columns. The stripping is performed at pH 8.5 and at 323.15 K (50 °C), which results in the volatilization of the ammonium present in ammonia. Subsequently, the stripping gas charged with ammonia is put into contact with a sulphuric acid solution, resulting in (NH 4 ) 2 SO 4 , which can be used as an N-S fertilizer. In addition, the digestion experiments have demonstrated that the biogas yield is 36% higher after removal of the ammonium from the digestate compared to the untreated digestate.

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Struvite precipitation for ammonium removal from anaerobically treated effluents

Cited by 51 publications

References 38 publications

The influence of different pretreatment methods on biogas production from Jatropha curcas oil cake

The influence of different pretreatment methods on biogas production from Jatropha curcas oil cake

Ammonium Sulphate from a Bio-Refinery System as a Fertilizer—Agronomic and Economic Effectiveness on the Farm Scale

Stripping and scrubbing of ammonium using common fractionating columns to prove ammonium inhibition during anaerobic digestion

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