Use of spent sulfidic caustic for autotrophic denitrification in the biological nitrogen removal processes: Lab-scale and pilot-scale experiments

Park, Jeung-Jin; Byun, Imgyu; Park, So-Ra; Lee, Jae-Ho; Park, Seunghan; Park, Tae-Joo; Lee, Tae‐Ho

doi:10.1016/j.jiec.2008.11.008

Cited by 20 publications

(5 citation statements)

References 19 publications

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“…Therefore, circumstantial evidence supports the notion that other biological nitrogen removal processes were occurring concomitantly with nitrification. Whereas the investigation of such biological mechanisms was beyond the scope of this study, it is worth mentioning that biomass agglutination in MLE systems could aid the formation of anoxic micro niches, thus favoring autotrophic denitrification and/or anammox (Park et al, 2009).…”

Section: Mle -Nitrification Reactor Performancementioning

confidence: 99%

“…These results were comparatively higher than the removal efficiencies reported for similar nitrificationdenitrification systems treating swine wastewater effluent. For instance, Park et al (2009), utilizing an anoxic-aerobic-anoxic sequence reactors, obtained TN removal of 90% for a LTN of 0.18 g L -1 d -1 . Removal efficiency below 80% was reported by Vanotti et al (2009) for a nitrification-denitrification system using a LTN of 0.31 g L -1 d -1 .…”

Section: Mle Efficiencymentioning

confidence: 99%

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Simultaneous removal of nitrogen and organic carbon from swine wastewater using the pre-denitrification/nitrification process

Bortoli¹,

Kunz²,

Prá

et al. 2019

Rev. ambiente água

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Wastewater from confined animal feeding operations (CAFOs) can interfere significantly with the natural nitrogen and phosphorus balance in the environment if not treated adequately prior to disposal. In this work, a modified Lutzak-Ettinger (MLE) consisting of sequential pre-denitrification/ nitrification was used to determine the effects of nutrient loading rates and hydraulic retention times (HRT) on total nitrogen (TN) and organic carbon (TOC) removal from swine wastewater. MLE reactor was continuously fed swine wastewater for over 205 days using different recycle ratios (Rr) and HRT. Higher TN and TOC removal efficiencies (90.7% and 96.1%, respectively) were obtained when recycling effluent from the nitrification tank (4.5:1) combined with effluent from the final clarifier (1:1). Removal efficiencies of 96% for TOC and 90% for TN were obtained for the maximum loading rates of 0.56 gTN L-1 d-1 and 2.15 g TOC L-1 d-1, respectively. TN and TOC removal rates were achieved with HRT in as little as 3.5 days. Overall, MLE was a robust bioprocess withstanding variations in wastewater physical-chemical composition and/or changes in operational conditions without significant impairment of N and TOC removal efficiencies.

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Section: Mle -Nitrification Reactor Performancementioning

confidence: 99%

Section: Mle Efficiencymentioning

confidence: 99%

Simultaneous removal of nitrogen and organic carbon from swine wastewater using the pre-denitrification/nitrification process

Bortoli¹,

Kunz²,

Prá

et al. 2019

Rev. ambiente água

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“…Waste reduction is driving the chemical industry towards clean technology as a secondary resource. Waste processing in the rayon industry is carried out appropriately to generate secondary waste resources while the mixing of several compounds in the waste stream provenience from liquid-liquid contact between NaOH and H 2 S. Immediately, sodium hydroxide the majority react with H2S becomes sodium hydrosulphide or sodium waste as spent sulfidic caustic (SSC) [2] [3] Sodium sulphide (Na 2 S) and sodium hydrosulphide (NaHS) are reaction products of the scrubbing H2S with NaOH solution by the Eq. ( 1), (2), and (3).…”

Section: Introductionmentioning

confidence: 99%

“…Waste processing in the rayon industry is carried out appropriately to generate secondary waste resources while the mixing of several compounds in the waste stream provenience from liquid-liquid contact between NaOH and H 2 S. Immediately, sodium hydroxide the majority react with H2S becomes sodium hydrosulphide or sodium waste as spent sulfidic caustic (SSC) [2] [3] Sodium sulphide (Na 2 S) and sodium hydrosulphide (NaHS) are reaction products of the scrubbing H2S with NaOH solution by the Eq. ( 1), (2), and (3). Sodium hydrosulphide can occur as predominant sulphide species in waste, therefore the reaction product is influenced by the pH of the spent NaOH solution is required.…”

Section: Introductionmentioning

confidence: 99%

“…However, these methods of treatment are expensive, using a mixture of ferrous and ferric salts is competitive process, and induce secondary pollution problems. [2], [6] [13] For the reduce of sulphide from waste and wastewater the most prevalent process involves its catalytic oxidation to a more benign form sulphate. In the chemical [14][24] catalytic oxidation method, ions SH-are converted into sulphate (SO42-) species , with the oxidants are hydrogen peroxide, sodium hypochlorite, potassium permanganate, chlorine and ferrate (VI) ions.…”

Section: Introductionmentioning

confidence: 99%

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Sulfide Removal by Catalitic Oxidation From Rayon Waste

Wulansari

2023

devotion

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Catalytic oxidation of spent sulfidic caustic consist of SH- ion or NaHS compound by H 2 O2 in neutral or acidic solution to elemental sulphur may provide a convenient and economical method for the control of sulphide wastes and their associated odors at pulp, paper and textile industry. Oxidation of sulfide in rayon waste by hydrogen peroxide was investigated in the presence of ferric sulfate catalyst. Kinetic equations and activation energies of H 2 O2 and SH- ion to total sulphur and sulphate in rayon waste for catalytic oxidation reaction were calculated based on the experimental results. For the removal of sulfide from sulfide solution the most common process involves its catalytic oxidation to a more benign form sulfate. The rate of sulfidic catalytic oxidation was found higher at lower initial sulphide concentration and the rate of sulphide catalytic oxidation was found directly proportional to loading and hydrogen peroxide addition. Optimum total sulphide concentration was achieved when sulphide solutions in the presence of H 2 O 2 in the ratios SH-/H 2 O 2 1:4.2. The potential user of H 2 O 2 determine the optimal conditions for control of odor, corrosion and waste treatment cost due to sulfide consisting of sulphur ion, sulphate ion, etc. The catalytic oxidation of sulphides into sulphates by H 2 O 2 may be applied directly to aqueous wastes containing these odorants

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Interaction effects of various reaction parameters on the treatment of sulfidic spent caustic through electro-photo-Fenton

Esfahani

Farhadian

Nazar

2019

Int. J. Environ. Sci. Technol.

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Use of spent sulfidic caustic for autotrophic denitrification in the biological nitrogen removal processes: Lab-scale and pilot-scale experiments

Cited by 20 publications

References 19 publications

Simultaneous removal of nitrogen and organic carbon from swine wastewater using the pre-denitrification/nitrification process

Simultaneous removal of nitrogen and organic carbon from swine wastewater using the pre-denitrification/nitrification process

Sulfide Removal by Catalitic Oxidation From Rayon Waste

Interaction effects of various reaction parameters on the treatment of sulfidic spent caustic through electro-photo-Fenton

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