SANI® process realizes sustainable saline sewage treatment: Steady state model-based evaluation of the pilot-scale trial of the process

Lü, Hui; Ekama, George A.; Wu, Di; Jiang, Feng; Loosdrecht, M.C.M. van; Chen, Guanghao

doi:10.1016/j.watres.2011.11.031

Cited by 72 publications

(42 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1-3 (Lu et al, 2012). 100 g COD þ 150:2 g SO 2− 4 þ 43:7 g H 2 O→53:2 g H 2 S þ 1:9 g sludge þ 190:0 g HCO − 3 ð1Þ 100 g NO − 3 þ 5:9 g HCO − 3 þ 35:92 g H 2 S→22:58 g N 2 þ 101:42 g SO 2− 4 þ 2:15 g sludge ð2Þ 100 g NH þ 4 þ 7:33 g HCO − 3 þ 346:7 g O 2 →5:2 g sludge þ 344 g NO − 3 þ 11:1 g H þ þ 98 g H 2 O ð3Þ SRB acquires energy from both assimilatory and dissimilatory pathways in the BSR process (Hadas and Pinkas 1995), whereas biomass yields little, e.g., 0.02-kg volatile suspended solids (VSS)/kg carbonaceous chemical oxygen demand (COD) converted ).…”

Section: Introductionmentioning

confidence: 99%

Resilience of sulfate-reducing granular sludge against temperature, pH, oxygen, nitrite, and free nitrous acid

Hao

Mackey

Guo

et al. 2016

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

Sulfate-reducing granular sludge has recently been developed and characterized in detail as part of the development of the sulfate reduction, autotrophic denitrification, nitrification integrated (SANI) process. However, information regarding temperature of granules to environmental fluctuation is lacking, an aspect that is important in dealing with real wastewater. A comprehensive assessment of sulfate-reducing granular sludge performance under various environmental conditions was thus conducted in this study, including temperature, pH, oxygen, nitrite, and free nitrous acid (FNA) as possible encountering conditions in the removal of organics and/or nitrate. Specific chemical oxygen demand removal rate of the granules was determined to be reduced by 65 % when the temperature varied between 10-15 °C, reduced by 70 % when dissolved oxygen (DO) was 0.5 mg/L or greater, and at least, reduced by 75 % when nitrite was 30 mg N/L or above. Nevertheless, the sludge activity recovered by 82, 100, and 86 % from exposure to high oxygen and nitrite and low temperature levels, respectively. Combined inhibition of nitrite and FNA on the sludge is strong and complex, while FNA alone reduced cell viability from 60 to 40 % when its concentration increased to 2.3 mg N/L. The present study demonstrates that sulfate-reducing bacteria (SRB) granules possess high resilience against varying environmental conditions, showing the high application potential of sulfate-reducing granular sludge in dealing with brackish and saline industrial or domestic wastewaters.

show abstract

Section: Introductionmentioning

confidence: 99%

Resilience of sulfate-reducing granular sludge against temperature, pH, oxygen, nitrite, and free nitrous acid

Hao

Mackey

Guo

et al. 2016

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

show abstract

“…After day 247 (period XI and XII), nitrate removal efficiencies decreased and the effluent nitrate concentration increased steadily from 0.7 mg L -1 NO 3 − -N to 25 mg L -1 NO 3 --N and 50 mg L -1 NO 3 --N which may be attributed to deficiency of the inorganic electron donor source. The effluent sulfate concentration increased to 315 mgSO 4 2-L -1 and 389 mgSO 4 2-L -1 in periods XI and XII, respectively, proportionally with increasing sulfide reoxidation to sulfate ion which were higher compared with period X. Thereby, the effluent sulfide concentrations decreased from 60 to and (D)).…”

Section: Part Ii: Sulfate and Cod Removals During Sulfide-based Autotmentioning

confidence: 92%

“…They used a sulfur‐reducing upflow sludge bed (SRUSB) reactor and an anoxic upflow sludge bed (AnUSB) reactors. Lu et al . developed a SANI pilot plant treating real screened saline sewage using separate anaerobic, anoxic, and aerobic reactors.…”

Section: Introductionmentioning

confidence: 99%

“…They used a sulfur-reducing upflow sludge bed (SRUSB) reactor and an anoxic upflow sludge bed (AnUSB) reactors. Lu et al 4 developed a SANI pilot plant treating real screened saline sewage using separate anaerobic, anoxic, and aerobic reactors. Similarly, Lu et al 8 investigated the treatment of saline sewage by the SANI process consisting of three separate reactors -the up-flow anaerobic sludge blanket reactor (UASB), the anoxic filter, and the aerobic filter, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of sulfide‐based autotrophic denitrification process in an anaerobic baffled reactor

Duyar

Özdemir

Akman

et al. 2017

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND High SO42‐, COD, and nitrogen‐containing wastewater treatment requires different bacterial groups and environmental conditions, which can be achieved by sequential separate processes. This study examined the simultaneous removal of SO42‐, COD and nitrogen in a four‐compartment ABR, which allowed enrichment of different group of bacteria in each compartment. Feed COD and SO42‐ concentrations were kept constant at 1200 and 1500 mg L‐1, corresponding to COD/SO4‐2 ratio of 0.8. Initially, ABR was tested at varying influent ammonium concentrations (25–1500 mg NH4+‐N/L). Further, the third compartment of ABR was supplemented with nitrate under varying loading rates (60–300 mgNO3‐N L‐1 d‐1) for autotrophic denitrification with the sulfide produced in the previous compartments. This kind of application mimicked the internal recirculation of nitrate, which can be generated via nitrification of ABR effluent. RESULTS High sulfate reduction efficiencies (over 86%) were observed up to 1000 mg L‐1 NH4+‐N, however, 1500 mg L‐1 NH4+‐N caused decrease in reduction efficiency. Optimum nitrate loading rate was determined as 146 mgNO3‐N L‐1 d‐1 at molar N/S ratio of 0.42, corresponding with 100% nitrate, 83% sulfate, and 79% COD removals. Nitrate removal decreased at higher nitrate loadings and high sulfate generation arising from sulfide oxidation was observed. CONCLUSION Sulfate and COD removals together with efficient sulfide‐based autotrophic denitrification succeeded in a single reactor configuration at S/N ratio of 0.42. The developed process has the potential to be used in lab‐scale applications. © 2017 Society of Chemical Industry

show abstract

“…However, one of the major disadvantages of conventional sludge systems is the large quantity of waste sludge produced. The novel Sulfate reduction, Autotrophic denitrification, and Nitrification Integrated (SANI) process can be effectively applied for the removal of organic matter and nitrogen from saline sulfatecontaining wastewaters, and it produces comparatively very low quantity of waste sludge (Lau et al, 2006;Lu et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Long-Term Effect of Seawater on Sulfate Reduction in Wastewater Treatment

BrandTessa

RoestKees

Chen

et al. 2015

Environmental Engineering Science

Self Cite

View full text Add to dashboard Cite

In sulfate-rich saline wastewater, biological sulfate reduction can occur spontaneously or applied beneficially for its treatment. Although application of sulfate-reducing bacteria (SRB) on saline domestic wastewater, obtained by seawater-based toilet flushing for instance has been suggested repeatedly, no study on the effect of applicability in the complete range of seawater concentration has been performed (salinity range of 0-3.5% and sulfate concentration of 0-2500 mg/L). The present article examines the long-term effect of seawater on biological sulfate reduction using three sequencing batch reactors fed with different volumetric fractions of seawater and freshwater. To evaluate this effect, the effluent quality, sulfate reduction rate, and microbial population in the reactors were investigated. The biomass-specific biological sulfate reduction rate decreased significantly (*45%) when salinity increased from 0.7% to 3.5%, while total organics removal remained unaffected. Differences in microbial population were observed for sludge adapted to 0.7% or 3.5% salinity. Even at high salinity (3.5%) and moderate temperature (20°C), biological sulfate reduction occurs and organics are removed sufficiently (>97%) by SRB. Therefore, biological sulfate reduction can be considered as a feasible process in treatment of saline-(£3.5%) and sulfate (£2500 mg/L)-rich wastewater.

show abstract

SANI® process realizes sustainable saline sewage treatment: Steady state model-based evaluation of the pilot-scale trial of the process

Cited by 72 publications

References 15 publications

Resilience of sulfate-reducing granular sludge against temperature, pH, oxygen, nitrite, and free nitrous acid

Resilience of sulfate-reducing granular sludge against temperature, pH, oxygen, nitrite, and free nitrous acid

Optimization of sulfide‐based autotrophic denitrification process in an anaerobic baffled reactor

Long-Term Effect of Seawater on Sulfate Reduction in Wastewater Treatment

Contact Info

Product

Resources

About