Removal of ammonium-N from ammonium-rich sewage using an immobilized Bacillus subtilis AYC bioreactor system

Xiao, Jingjing; Zhu, Changliang; Sun, Dongyuan; Ping, Guo; Yang, Tian

doi:10.1016/s1001-0742(10)60542-6

Cited by 19 publications

(8 citation statements)

References 18 publications

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“…Denitrifying organisms require an organic carbon source for their respiration and growth (Cao et al 2002). Thus, carbon addition can accelerate nitrogen degradation by bacteria (Xiao et al 2011). Water exchange is a common and effective method for NH 4 -N and NO 2 -N removal in aquaculture.…”

Section: Discussionmentioning

confidence: 99%

“…Highly efficient bacteria play an important role in immobilization. The bacteria used in immobilization include nitrifying bacteria, denitrifying bacteria, effective microorganisms (EMs) and Bacillus sp., among others (Seo et al 2001;Hsieh et al 2002;Hill and Khan 2008;Lee and Cho 2010;Xiao et al 2011). In addition to the bacteria, the gel matrices are also important in immobilization.…”

Section: Introductionmentioning

confidence: 99%

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Ammonia and nitrite nitrogen removal in shrimp culture by Vibrio alginolyticus VZ5 immobilized in SA beads

Shan

Bao

et al. 2015

Aquacult Int

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The toxicity of nitrogen in the shrimp culture water has been well established. In this study, SA beads composed of Vibrio alginolyticus VZ5, sodium alginate (SA) and sugarcane bagasse were used for ammonia nitrogen (NH 4 -N) and nitrite nitrogen (NO 2 -N) removal. A 50-day cultivation experiment was carried out in aquaria to evaluate the activity of the SA beads in shrimp culture. The results indicate that SA beads have a maximum capacity of 1.06 9 10 8 colony-forming units (cfu)/bead. However, the optimal initial density of the bacteria embedded in the SA beads is 10 4 -10 5 cfu/bead. The maximum NO 2 -N degradation rate achieved for the SA beads was 8.44 mg/L/day, and the average NO 2 -N degradation per bead was 0.06 mg. The addition of a carbon source accelerated the degradation of NH 4 -N and NO 2 -N by the SA beads. The NH 4 -N and NO 2 -N concentrations after treatment with SA beads were below 1.55 and 1.62 mg/L, respectively, at later time points, and these concentrations were significantly lower than in the group without any treatment (P \ 0.05, df = 17). There were no significant differences in the NH 4 -N and NO 2 -N concentrations following treatments with SA beads and water exchange (P [ 0.05, df = 29), and the yield resulting from water treatment with SA beads reached approximately 70 % of the yield with water exchange treatment. Moreover, the particulate organic carbon and dissolved organic carbon concentrations in the water were enhanced by the addition of SA beads. At later time points, some of the SA beads had broken down, and the sugarcane bagasse from the SA beads may have served as a carbon

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ammonia and nitrite nitrogen removal in shrimp culture by Vibrio alginolyticus VZ5 immobilized in SA beads

Shan

Bao

et al. 2015

Aquacult Int

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“…The screening of dominant denitrifying bacteria has 2 steps [33]. The optimal culture conditions were obtained by preliminary experiments, which are 5%, carbon source of calcium carbonate + citric acid sodium, carbon source concentration of 3 g/L, temperature of 35 • C, pH of 8 and trace elements.…”

Section: Detection and Analysis Of Sedimentmentioning

confidence: 99%

“…The prepared immobilized beads were cross-linked in the crosslinking agent in 4 • C for 36 h to ensure its strength and were washed with normal saline (0.9% of NaCl solution) before use [34]. The screening of dominant denitrifying bacteria has 2 steps [33]. The optimal culture conditions were obtained by preliminary experiments, which are 5%, carbon source of calcium carbonate + citric acid sodium, carbon source concentration of 3 g/L, temperature of 35 °C, pH of 8 and trace elements.…”

Section: Immobilization Of Active Breadsmentioning

confidence: 99%

Screening and Immobilizing the Denitrifying Microbes in Sediment for Bioremediation

Yan

2019

Water

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In this study, immobilized microbial beads were proposed as a solution for excessive nitrogen concentration of the river sediment. The predominant denitrifying microbes were screened from the river sediment. The optimized production of immobilized microbial beads and long-term nitrogen removal efficiency were investigated. 16S rRNA gene sequencing analysis showed that denitrifying bacteria such as Pseudomonas, Alcaligenes, Proteiniclasticum, Achromobacter and Methylobacillus were dominant microflora in the enriched microbial agent, which accounted for 94.43% of the total microbes. Pseudomonas belongs to Gammaproteo bacteria, accounting for 49.22% and functioned as the most predominant denitrifying bacteria. The material concentration of 8% polyvinyl alcohol, 0.5% sodium alginate and 12.5% microbial biomass were found to be the optimal immobilizing conditions. The NH4+-N and total nitrogen (TN) removal rates in sediment with dosing immobilized microbial beads were estimated as 68.1% and 67.8%, respectively, when compared to the dosing liquid microbial agent were 50.5% and 49.3%. Meanwhile, the NH4+-N and TN removal rates in overlying water went up from 53.14% to 59.69% and from 68.03% to 78.13%, respectively, by using immobilized microbial beads.

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“…It has been shown that NH 4 + -N could reach maximum rate of elimination at value 10.8 of C/N ratio. The stoichiometric requirement for denitrification is 4.2 g COD g N -1 [6]. The excrescent organic matter supplied to the system might be consumed by oxidation or assimilation but not during the denitrification process.…”

Section: A Factors Influencing Of Ammonium Removalmentioning

confidence: 99%

Coimmobilized Microalgae and Nitrifying Bacteria for Ammonium Removal

Bai¹,

Gu²,

Li³

2016

IJESD

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Removal of ammonium-N from ammonium-rich sewage using an immobilized Bacillus subtilis AYC bioreactor system

Cited by 19 publications

References 18 publications

Ammonia and nitrite nitrogen removal in shrimp culture by Vibrio alginolyticus VZ5 immobilized in SA beads

Ammonia and nitrite nitrogen removal in shrimp culture by Vibrio alginolyticus VZ5 immobilized in SA beads

Screening and Immobilizing the Denitrifying Microbes in Sediment for Bioremediation

Coimmobilized Microalgae and Nitrifying Bacteria for Ammonium Removal

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