Ammonia-based flue gas desulphurization waste solution as a nitrogen fertilizer

Gissel‐Nielsen, Gunnar; Bertelsen, Finn

doi:10.1007/bf01782993

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…There have been many in-situ pretreatment methods widely employed to lessen the emission of these polluting gases and to protect the global environment. Among these methods, SO2 has been captured to produce wallboard (gypsum) [22,23], sulfuric acid and fertilizer [24].…”

Section: Introductionmentioning

confidence: 99%

Sulfur-containing air pollutants as draw solution for fertilizer drawn forward osmosis desalination process for irrigation use

et al. 2017

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This study investigated suitability and performance of the sulfur-based seed solution (SBSS) as a draw solution (DS), a byproduct taken from the photoelectrochemical (PEC) process where the SBSS is used as an electrolyte for H2 production. This SBSS DS is composed of a mixture of ammonium sulfate ((NH4)2SO4) and ammonium sulfite ((NH4)2SO3), and it can be utilized as fertilizer for fertilizer drawn forward osmosis (FDFO) desalination of saline water. The FDFO process employed with thin-film composite (TFC) membrane and showed that the process performance (i.e. water flux and reverse salt flux) is better than that with cellulose triacetate (CTA) membrane. In addition, it produced high water flux of 19 LMH using SBSS as DS at equivalent concentration at 1 M and 5 g/L NaCl of feed solution (model saline water). Experimental results showed that the reverse salt flux of SBSS increased with the increase in pH of the DS and that lowering the concentration of ammonium sulfite in the SBSS led to the higher water flux of feed solution. The result also demonstrated that this SBSS is practically suitable for the FDFO process toward development of water-energy-food nexus technology using sulfur chemicals-containing air pollutant.

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Section: Introductionmentioning

confidence: 99%

Sulfur-containing air pollutants as draw solution for fertilizer drawn forward osmosis desalination process for irrigation use

et al. 2017

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“…A defoaming agent generally has two properties, one is the anti-foaming property that inhibits solution foaming and the other is rapid breaking of the formed foam. 6 Therefore, when a defoaming agent is selected, we should choose two kinds of strong properties of the defoaming agent.…”

Section: Resultsmentioning

confidence: 99%

Causes and Control Technology of Slurry Overflow in an Ammonia Desulfurization Tower

et al. 2021

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In the flue gas ammonia desulfurization process of the coal chemical industry, ammonium sulfate slurry in the desulfurization tower often foams and overflows, which wastes resources and pollutes the environment. The solution to this problem remains largely unknown. This paper aims to reveal the causes of foaming by analyzing foam composition, ammonia desulfurization process raw material source, and characteristics of the flue gas source of the coal chemical industries. It is seen that the organic carboxylate ammonium salt surfactant in the slurry was the main cause of ammonium sulfate slurry foaming. Moreover, due to ammonium sulfate crystals and ash in foam forming a skeleton to support the foaming structure, the foam was not easy to break. More importantly, an appropriate defoaming agent was screened and optimized by an ammonia desulfurization tower simulated device in the laboratory. The YLZ-3 compound defoaming agent, with the optimal defoaming efficiency, was obtained by combining a polyether siloxane copolymer, n-octyl alcohol, fumed silica, and deionized water. It had a good temperature stability and little influence on the ammonium sulfate slurry drying time. However, defoaming agent addition could affect the ammonium sulfate crystal form. The foam overflowing could be controlled by spraying the defoaming agent from the top of the tower. Thus, the problem of bubbling overflow of the ammonia desulfurization tower could be resolved very well.

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Metal Ions and Plant Nutrition

Mehra

Farago

1994

Plants and the Chemical Elements

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Ammonia-based flue gas desulphurization waste solution as a nitrogen fertilizer

Cited by 5 publications

References 4 publications

Sulfur-containing air pollutants as draw solution for fertilizer drawn forward osmosis desalination process for irrigation use

Sulfur-containing air pollutants as draw solution for fertilizer drawn forward osmosis desalination process for irrigation use

Causes and Control Technology of Slurry Overflow in an Ammonia Desulfurization Tower

Metal Ions and Plant Nutrition

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