Autotrophic Denitrification with Elemental Sulphur in Small-Scale Wastewater Treatment Facilities

Kuai, Linping; Verstraete, Willy

doi:10.1080/09593332008616809

Cited by 35 publications

(14 citation statements)

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“…Once tested its feasibility, SLAD was applied to the treatment of groundwater and wastewater from different sources. Kuai and Verstraete [22] achieved total organic nitrogen (TON) removal up to 86% from municipal wastewater at hydraulic retention times (HRTs) ranging from 2 to 3 h. Saline wastewater was treated in several sulfur/limestone PBRs by Gu et al [23] and Zhao et al [24]. Denitrification rates of 0.42 and 0.68 kg N-NO 3 À /m 3 d were achieved at HRT of 14.4 and 8.8 h, respectively.…”

Section: Sulfur-limestone Autotrophic Denitrification (Slad)mentioning

confidence: 98%

Chemolithotrophic denitrification in biofilm reactors

Capua

Papirio

Lens

et al. 2015

Chemical Engineering Journal

170

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Section: Sulfur-limestone Autotrophic Denitrification (Slad)mentioning

confidence: 98%

Chemolithotrophic denitrification in biofilm reactors

Capua

Papirio

Lens

et al. 2015

Chemical Engineering Journal

170

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“…It has been applied at pilot scale and has been mostly used for drinking water production, by adding elemental sulfur as electron donor (Driscoll and Bisogni, 1978;Koenig and Liu, 1997;Kuai and Verstraete, 1999;Zhang and Lampe, 1999). Few applications of combined sulfide and nitrate removal by the autotrophic denitrification process are reported for treatment of industrial wastewater (Gommers and Kuenen, 1988;Kleerebezem and Mendez, 2002;Reyes-Avila et al, 2004).…”

Section: Introductionmentioning

confidence: 98%

Combined removal of sulfur compounds and nitrate by autotrophic denitrification in bioaugmented activated sludge system

Manconi

Carucci

Lens

2007

Biotech & Bioengineering

110

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An autotrophic denitrification process using reduced sulfur compounds (thiosulfate and sulfide) as electron donor in an activated sludge system is proposed as an efficient and cost effective alternative to conventional heterotrophic denitrification for inorganic (or with low C/N ratio) wastewaters and for simultaneous removal of sulfide or thiosulfate and nitrate. A suspended culture of sulfur-utilizing denitrifying bacteria was fast and efficiently established by bio-augmentation of activated sludge with Thiobacillus denitrificans. The stoichiometry of the process and the key factors, i.e. N/S ratio, that enable combined sulfide and nitrogen removal, were determined. An optimum N/S ratio of 1 (100% nitrate removal without nitrite formation and low thiosulfate concentrations in the effluent) has been obtained during reactor operation with thiosulfate at a nitrate loading rate (NLR) of 17.18 mmol N L(-1) d(-1). Complete nitrate and sulfide removal was achieved during reactor operation with sulfide at a NLR of 7.96 mmol N L(-1) d(-1) and at N/S ratio between 0.8 and 0.9, with oxidation of sulfide to sulfate. Complete nitrate removal while working at nitrate limiting conditions could be achieved by sulfide oxidation with low amounts of oxygen present in the influent, which kept the sulfide concentration below inhibitory levels.

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“…A number of researchers have used reduced sulfur compounds for biological denitrification of domestic wastewater (Kuyai and Verstraete, 1999), industrial wastewater (Nugroho et al, 2002), and drinking water (Furumai et al, 1996;Soares, 2002). Several early studies focused on thiosulfate as an electron donor (Claus and Kutzner, 1985;Furumai et al, 1996).…”

Section: Sulfur Oxidizing Denitrificationmentioning

confidence: 99%

Autotrophic Biological Denitrification for Complete Removal of Nitrogen from Septic System Wastewater

Sengupta

Ergas

Lopez-Luna

et al. 2006

Water Air Soil Pollut: Focus

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The overall objective of this research was to develop a reliable, robust, and maintenance-free passive system for biological denitrification in on-site wastewater treatment systems. The process relies on sulfur oxidizing denitrifying bacteria in upflow packed bioreactors. Since this process consumes alkalinity, it is necessary to add a solid-phase buffer that can scavenge the H + as it is generated by the biologically-mediated reaction and arrest the drop in the pH value. This study investigated the use of limestone, marble chips and crushed oyster shell as solid-phase buffers that provide alkalinity.Two bench-scale upflow column reactors and two field-scale bioreactors were constructed and packed with sulfur pellets and an alkalinity source. The pilot scale bioreactors (∼200 L each) were installed at the Massachusetts Alternative Septic System Test Center (MASSTC) in Sandwich, MA. The pilot-scale bioreactors performed better when oyster shell was used as the solid-phase buffer vis-à-vis marble chips. In both (pilot-scale and laboratory-scale) systems, denitrification rates were high with the effluent NO − 3 N concentration consistently below 8 mg/L.

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Autotrophic Denitrification with Elemental Sulphur in Small-Scale Wastewater Treatment Facilities

Cited by 35 publications

References 0 publications

Chemolithotrophic denitrification in biofilm reactors

Chemolithotrophic denitrification in biofilm reactors

Combined removal of sulfur compounds and nitrate by autotrophic denitrification in bioaugmented activated sludge system

Autotrophic Biological Denitrification for Complete Removal of Nitrogen from Septic System Wastewater

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