Efficient nitrogen removal in a pilot system based on upflow multi-layer bioreactor for treatment of strong nitrogenous swine wastewater

An, Jin-Young; Kwon, Joong-Chun; Ahn, Deog-Won; Shin, Dong Ku; Shin, Hang‐Sik; Kim, Byung-Woo

doi:10.1016/j.procbio.2007.01.020

Cited by 15 publications

(8 citation statements)

References 25 publications

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“…High nitrogen removal at a low BOD-to-nitrogen ratio appears to be caused by a high specific endogenous denitrification rate in the dense sludge blanket of the UMBR, where it has a concentration stratification of MLSS in the range 5 to 13 g/L, depending on upflowing position and upflow velocity (An et al, 2007). Beer et al (1977) suggested that specific endogenous denitrification was not related to MLSS in the range 2.5 to 4.0 g/L.…”

Section: Resultsmentioning

confidence: 99%

Performance of a Full‐Scale Biofilm System Retrofitted with an Upflow Multilayer Bioreactor as a Preanoxic Reactor for Advanced Wastewater Treatment

Kwon

Ahn³

et al. 2008

Water Environment Research

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To enhance nitrogen removal in an existing microbial contact oxidation (MCO) system with a treatment capacity of 900 m 3 /d, an upflow multilayer bioreactor (UMBR) was chosen as a preanoxic reactor for the removal of organic matter and nitrate. The removal performance of the retrofitted plant was evaluated during the startup phase at a low temperature in winter. The high removal (.80%) of organic matter and suspended solids in the UMBR provided stable nitrification conditions in the MCO system, as a result of the substantial reduction in organic matter and solids loaded onto the MCO system. This treatment system showed a stable nitrogen removal efficiency of 75.3%, even in the low temperature range 7 to 108C. Phosphorus was completely removed by chemical precipitation. Production rates of excess sludge, as a function of the loads of influent flowrate and biological oxygen demand (BOD), were 0.022 kg dry solid/m 3 wastewater and 0.132 kg dry solid/kg BOD. Water Environ. Res., 80, 757 (2008).

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Section: Resultsmentioning

confidence: 99%

Performance of a Full‐Scale Biofilm System Retrofitted with an Upflow Multilayer Bioreactor as a Preanoxic Reactor for Advanced Wastewater Treatment

Kwon

Ahn³

et al. 2008

Water Environment Research

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“…Normally, during nitrification process, NH 4 + -N oxidation is accompanied with hydrogen ions (H + ) release thereby causing pH drop in the system. It has been widely documented in literature that nitrification efficiency highly depends on the solution pH (Metcalf and Eddy, 2003;An et al, 2007;Anup et al, 2011). As a result, sodium bicarbonate (NaHCO 3 ) as an extra alkaline source has been added for most studies to maintain stable pH condition (Trussell et al, 2006;Holakoo et al, 2007;Anup et al, 2011).…”

Section: Figmentioning

confidence: 99%

Simultaneous removal of phosphorus and nitrogen from sewage using a novel combo system of fluidized bed reactor–membrane bioreactor (FBR–MBR)

Guadie

Xia

Zhang

et al. 2013

Bioresource Technology

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A FBR-MBR combo system was designed as a novel approach for simultaneous phosphorus and nitrogen removal from sewage. The combo system was evaluated more than 7 months under variable pH (7.5-9.5), hydraulic retention times (HRT=2-10h), intermittent aeration cycles (IAC) (on/off=60/60-15/45 min) and sludge retention times (SRT=10-60 d). Prior recovery of phosphorus as struvite in the FBR enhanced nitrogen and COD removal efficiency in MBR. Under optimum operating conditions (pH=9, HRT=6h and IAC=45/15 min), PO4(3-)-P, NH4(+)-N and COD removal efficiencies were 92.6 ± 4.2, 98.7 ± 1.2 and 99.3 ± 0.5%, respectively. Stable mixed liquor suspended solid concentration (3.0-5.0 g/L); enhanced nitrification-denitrification activity (78-92%) and reduced transmembrane pressure were also achieved. Compared to soluble microbial products, extracellular polymeric substances (EPS) showed strong correlation with fast membrane fouling. Among EPS components, carbohydrate rather than protein was associated with membrane fouling. Except HRT, all parameters considered (pH, IAC, SRT) showed a significant effect on removal efficiency.

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“…During the nitrification process, the oxidation of NH 4 + -N releases hydrogen ions (H + ) that decreases the pH in the nitrification reactor and could inhibit the nitrification efficiency (An et al, 2007;Vanotti and Hunt, 2000). Lack of alkalinity in the nitrification reactor could lead to poor NH 4 +-N removal efficiency as alkalinity is consumed during nitrification (Yoo et al, 1999).…”

Section: Nh 4 + -N No 2 --N and No 3 --N Removalmentioning

confidence: 99%

“…Swine wastewater contains high amounts of organic matter and nutrients, and hence it is widely applied as fertilizer for increasing crop productivity (Deng et al, 2006;Zhang et al, 2006). Generally, swine wastewater is treated anaerobically in order to reduce the level of pollutants and to recover methane gas (An et al, 2007;Deng et al, 2006;Lee et al, 2008). However, the inappropriate *Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Removal of nitrogen from anaerobically digested swine wastewater using an anoxic/oxic (A/O) process complemented with a sulfur-packed biofilter

Gurung¹,

Woo-Chang²,

Oh³

2013

Afr. J. Biotechnol.

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A modified lab-scale anoxic/oxic process was designed incorporating an upflow sulfur-packed biofilter for the treatment of anaerobically digested swine wastewater. In this study, chemical oxygen demand (COD), NH 4 +-N and NO x-N removal efficiencies were investigated. The experimental results showed that by increasing the internal recycle ratio from 1 to 3, the overall performance of the system improved. Organics removal efficiency was found to be fairly high and stable and the average total chemical oxygen demand (TCOD) removal efficiency ranged from 79 to 90%. This process removed up to 98% of the total NH 4 +-N from the nitrification reactor with proper pH control using excess alkalinity and a recycle ratio of 3. The average removal efficiency of NO x-N in the anoxic reactor was above 80% with the poor effluent quality (25 mg/l). This high concentration of NO x-N in the effluent of the anoxic reactor was removed by the sulfur-packed biofilter with the stable effluent concentrations between 0.4 and 4 mg/l. This result indicates that the sulfur-packed biofilter would be used as an efficient option for denitrification by autotrophic denitrifiers during swine wastewater treatment.

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Efficient nitrogen removal in a pilot system based on upflow multi-layer bioreactor for treatment of strong nitrogenous swine wastewater

Cited by 15 publications

References 25 publications

Performance of a Full‐Scale Biofilm System Retrofitted with an Upflow Multilayer Bioreactor as a Preanoxic Reactor for Advanced Wastewater Treatment

Performance of a Full‐Scale Biofilm System Retrofitted with an Upflow Multilayer Bioreactor as a Preanoxic Reactor for Advanced Wastewater Treatment

Simultaneous removal of phosphorus and nitrogen from sewage using a novel combo system of fluidized bed reactor–membrane bioreactor (FBR–MBR)

Removal of nitrogen from anaerobically digested swine wastewater using an anoxic/oxic (A/O) process complemented with a sulfur-packed biofilter

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