Removal of ammonium ions from digested sludge liquors using natural sorbent zeolite

Mažeikienė, Aušra; Dauknys, Regimantas

doi:10.3846/enviro.2014.087

Cited by 8 publications

(8 citation statements)

References 12 publications

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“…Samples with bigger than 150 mg/L NH 4 + -N were diluted with distilled water (1:10; 1:100 and 1:1000 dilution) and the concentration of ammonium nitrogen was determined accordingly. The studies of NH 4 + -N concentrations in the samples were carried out by using natural zeolite (Table 1), a Transcarpatian clinoptilolite (its mineral content was found to be about 87%) of aluminium-silicate origin, which adsorbs high quantities of ammonium (Sakalauskas, Valentukevičienė 2003;Sprinsky et al 2005;Mažeikienė et al 2008;Valentukevičienė, Rimeika 2007;Saltah et al 2007).…”

Section: Methodsmentioning

confidence: 99%

Removal of Ammonium Ions From Digested Sludge Fugate by Using Natural Zeolite

Mažeikienė

Valentukevičienė

2016

Journal of Environmental Engineering and Landscape Management

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Wastewater treatment loadings with total nitrogen can increased by introducing fugate that is saturated with ammonium ions, generated when dewatering wastewater treatment sludge. In this article the possibility to reduce the concentration of ammonium ions in the fugate by the use of natural zeolite (Transcarpatian clinoptilolite) has been analysed. Lab-scale experiments were carried out with different particle sizes zeolite: 0.8–1.6 mm, 1.6–2.5 mm and 2.5–3.2 mm. At the first stage of the experiments, zeolite particles were mixed with fugate and left to settle until a 99% efficiency of ammonium ion removal was achieved. At the second stage, ammonium ions were removed from the fugate by filtering this liquid through zeolite where the 70–92% efficiency was achieved. Zeolite saturated with ammonium ions possibly can be used in agriculture as nitrogenous fertilizers. Obtained fertilizer grade of zeolite saturated with fugate can also be produced from the high ammonium nitrogen concentration side-streams separated from wastewater flow from sludge digestion processes.

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Section: Methodsmentioning

confidence: 99%

Removal of Ammonium Ions From Digested Sludge Fugate by Using Natural Zeolite

Mažeikienė

Valentukevičienė

2016

Journal of Environmental Engineering and Landscape Management

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“…Modification of natural zeolites for adsorption of heavy metals from drinking water 18 .Modification of natural zeolites for adsorption of nitrates and ammonium ions from water. 19 Modification of natural zeolites for adsorption of nitrate from groundwater 20 . Removal of NaCl from aqueous solutions by using clinoptilolite zeolite 21 .…”

Section: -mentioning

confidence: 99%

Utilization of Modified Natural Zeolite using SomeTreatments For Reduction of Na+, K+, Cl-And NaCl Contents in Brackish Water

Lepa¹,

Salim²,

Kafiar³

2018

IJCTR

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Absorption of brackish water using modified natural zeolite has been done. There were 3 types of natural zeolit modification treatment. Firstly, the natural zeolite was only heated at temperature of 120 o C.Secondly,dealumination of natural zeolite with 6M HCl then dried at 120 ° C. Thirdly,dealumination of naturalzeolite with 6M HCl,then followed by treating with NaOH, AlCl 3 .6H 2 O, CTAB and distilled water (made hydrophilic zeolite).The mixture was regulated to pH of 12. Next, poured into a reactor for hydrothermal process at 140 o C for 24 h. The results of the dealumination of natural zeolite was characterized byX-ray Fluorescence and the modified natural zeolites were characterized using X-Ray Diffraction,and surface area analyzer.The Absorption ofbrackish water using modified natural zeolit was carried out in the variation of ratio of zeolite (g) to brackis water (mL) of 0.5 : 50; 1 : 50; 1.5 : 50; 2 : 50 and 2.5 : 50 respectively. The filtrate results of absorption were analyzed using Atomic Absorption Spectrophotometry (Na + and K + contents) and Mohr Method (Cland NaCl contents).The resulted showed that the dealumination of natural zeolite had Si content of 39.28%, and Al content of 3.27 %. The results of measurements with XRD produced a different form of chromatogram and type of zeolite. The results of measurements with Surface area analyzer oobtained increase in surface area, pore volume and pore diameter from natural zeolite to modified natural zeolite with the addition of AlCl 3 .6H 2 O and CTAB.Theabsorption results of brackish water were58.12(NZ), 94.20(MNZ) and 90.45% (ZSNZ zeolite) respectivelyat ratio of 2.5 g zeolite to 50 mL of brackish water.

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“…These wastewaters have high treatment costs when conventional nitrification-denitrification methods are applied, due to a need for an external organic carbon source, high energy consumption in aeration, expenditures for the utilization of excess sludge, etc. Appropriate energy efficient technologies for nitrogen-rich waste streams with a low C/N (carbon to nitrogen) ratio include physicochemical methods such as zeolite adsorption [1,2] or autotrophic biological nitrogen removal [3]. Examples of technologies of autotrophic nitrogen removal include SHARON ® [4], CANON [5], OLAND [6], NO x -processes [7], BABE ® and PANDA processes [8], the DIB technology [8] and the DEMON process [9,10].…”

Section: Introductionmentioning

confidence: 99%