Biological nitrogen removal using bio-sorbed internal organic carbon from piggery wastewater in a post-denitrification MLE process

2004 ◽  
Vol 49 (5-6) ◽  
pp. 373-386 ◽  
Author(s):  
S.-M. Park ◽  
H.-B. Jun ◽  
Y.-J. Chung ◽  
S.-H. Lee
Keyword(s):  
Organic Matter ◽  
Nitrogen Removal ◽  
Nitrate Reduction ◽  
Hydraulic Retention Time ◽  
Carbon Sources ◽  
Synthetic Wastewater ◽  
Biological Nitrogen Removal ◽  
Nitrification Rate ◽  
Piggery Wastewater ◽  
Biological Nitrogen

Nitrogen removal from a piggery wastewater was investigated in a post-denitrification modified Lüdzack Ettinger (PDMLE) process. Overall hydraulic retention time (HRT) of the PDMLE, consisting of contact/separator (C/S), nitrification, denitrification and re-aerobic bioreactor was 10 days. 60% of the influent SCOD was separated in the C/S by contacting the return sludge with the synthetic wastewater, however, only 10% of the influent SCOD was separated from the piggery wastewater. Biosorption capacities of the synthetic wastewater and piggery wastewater were 800 and 150 mg/g-MLSS, respectively. In spite of the high organic and nitrogen load, nitrification efficiency was above 95%, and nitrification rate was about 180 mg-NH4+-N/L·day. The removed ΔCOD/Δnitrate ratios in the denitrification tank were 4.0 and 11.5 g-SCOD/g-nitrate, while denitrification rates were 8.4 and 2.6 mg-nitrate/day for synthetic and piggery wastewater, respectively. In the proposed PDMLE process, both bio-sorbed and bypassed organic matter could be successfully used for nitrate reduction as carbon sources and the final TN removal efficiency was as high as 95%.

Biological Nitrogen Removal under Low Temperature in a Membrane Separation Bioreactor

1993 ◽  
Vol 28 (10) ◽  
pp. 325-333 ◽  
Author(s):  
C. Chiemchaisri ◽  
K. Yamamoto
Keyword(s):  
Low Temperature ◽  
Nitrogen Removal ◽  
Oxygen Transfer ◽  
Membrane Separation ◽  
Nitrifying Bacteria ◽  
Biological Nitrogen Removal ◽  
Nitrification Rate ◽  
Temperature Decrease ◽  
Operational Cycle ◽  
Biological Nitrogen

Biological nitrogen removal under low temperature in a membrane separation bioreactor for on-site domestic wastewater treatment was studied. The bioreactor was operated under intermittent aeration of a 180-minute operational cycle to achieve simultaneous nitrification and denitrification for nitrogen removal. During stepwise temperature decrease from 25°C to 5°C at every two weeks duration, nitrogen removal started to deteriorate as temperature dropped to 10°C. It decreased from more than 90% at 25°C to 20% at 5°C as a result of inhibition of nitrification at low temperature. However, increasing oxygen supply, i.e. increasing aeration time in operational cycle, could completely recover nitrification at 10°C. Nitrogen removal could be achieved by introducing non-aeration period after complete nitrification was obtained. Average nitrogen removal was 90 and 85% under 10 and 5°C respectively. The results indicated that sufficient oxygen transfer could be maintained in the membrane separation bioreactor even if the temperature was as low as 5°C. Analysis of respiratory quinone component of sludge suggested the decrease of strict aerobic bacteria percentage in mixed liquor during temperature decrease and increase of their percentage during the recovery of nitrification at 10°C. These changes could be related to the nitrification through the changes of oxygen transfer condition in the system. Insignificant difference of maximum volumetric nitrification rate obtained at 25 and 5°C probably suggests that there was not much difference in oxygen availability for nitrifying bacteria between both the temperatures once high and stable nitrogen removal was achieved.

A Short Review of Wastewater Biological Treatment at Low C/N ratio

2014 ◽  
Vol 962-965 ◽  
pp. 1490-1494
Author(s):  
Jian Zheng Li ◽  
Shuai Shi
Keyword(s):  
Carbon Source ◽  
Nitrogen Removal ◽  
Biological Treatment ◽  
Carbon Sources ◽  
Short Review ◽  
Biological Nitrogen Removal ◽  
Removal Processes ◽  
Biological Nitrogen ◽  
Low Nitrogen ◽  
Wastewater Biological Treatment

Low nitrogen removal efficiency caused by the lack of carbon source in low C/N ratio wastewater restricts the wastewater biological treatment. Advances in wastewater biological treatment at low C/N ratio are reviewed in the paper from three aspects, including modifying traditional biological nitrogen removal process, developing novel biological nitrogen removal processes and optimizing traditional carbon source and developing new types of carbon sources. The mechanisms, advantages, and applications of these processes are also summarized and analyzed.

A membrane bioreactor for an innovative biological nitrogen removal process

2010 ◽  
Vol 61 (3) ◽  
pp. 671-676 ◽  
Author(s):  
W. Chen ◽  
F. Y. Sun ◽  
X. M. Wang ◽  
X. Y. Li
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Loading Rate ◽  
Nitrogen Loading ◽  
Synthetic Wastewater ◽  
Biological Nitrogen Removal ◽  
Laboratory System ◽  
Working Volume ◽  
Biological Nitrogen

A hybrid system has been developed for biological nitrogen removal through nitrification-denitrification. The system includes an aerobic tank and an anoxic tank with an intermediate sludge settler connected to a membrane bioreactor (MBR) with a submerged 0.4 μm hollow-fiber membrane module. The laboratory system has a total working volume of 6.5 L treating a glucose-based synthetic wastewater. The experimental results demonstrate that the new process is highly effective for simultaneous organic and nitrogen removal. During the stationary operation, a sludge SS (suspended solids) concentration of 6 g/L or higher can be maintained in the reactors. The system has a COD (chemical oxygen demand) loading rate of up to 2,100 mg/L-d and a total nitrogen loading rate of up to 170 mg N/L-d. More than 95% COD can be degraded, and the total nitrogen removal efficiency can be 90% or higher as the nitrogen is reduced from 100 to around 7.5 mg/L. A high quality effluent is produced with a SS of less than 1 mg/L. With the MBR, organic degradation, nitrogen removal and sludge-liquid separation can be well achieved within a short HRT of about 10 hr.

Research Progress on the Anammox Technology

2011 ◽  
Vol 347-353 ◽  
pp. 2015-2020 ◽  
Author(s):  
Feng Xun Tan ◽  
Min Huang ◽  
Dao Ji Wu ◽  
Zhao Liang Zhu
Keyword(s):  
Nitrogen Removal ◽  
Ammonia Oxidation ◽  
Carbon Sources ◽  
Research Progress ◽  
Biological Nitrogen Removal ◽  
Anammox Bacteria ◽  
Ammonium Oxidation ◽  
Physiological And Biochemical Characteristics ◽  
Anaerobic Ammonia Oxidation ◽  
Biological Nitrogen

With the continuing phenomenon of eutrophication, the pollution of nitrogen has caused wide concern. Lack of organic carbon sources is always considered to be a key problem for nitrogen removal efficiency and cost when conventional biological nitrogen removal process was used to the treatment of ammonium-rich wastewater, but the anaerobic ammonium oxidation（ANAMMOX）can solve this problem .Anammox has so many advantages that it has good prospects in the biological nitrogen removal in wastewater. Anammox bacteria grows slowly, has a long generation time, and is susceptible to the environmental conditions. DO, Temperature, pH and organic can impact the process of anammox, so it is necessary to take careful methods to cultivate Anammox biomass. Depending on the purpose of improve water quality, appropriate treatment reactors and seed sludge should be selected to start ANAMMON process. The discovery of anaerobic ammonia oxidation, the reaction mechanism, influence application, the enrichment of anammox bacteria, physiological and biochemical characteristics of anammox bacteria, the start of anaerobic ammonia oxidation are reviewed in this paper.

Biological nitrogen removal in a modified anoxic/oxic process for piggery wastewater treatment

2015 ◽  
Vol 57 (24) ◽  
pp. 11266-11274 ◽  
Author(s):  
Liang Wang ◽  
Jin-Ming Xu ◽  
Shu-Shuang Ma ◽  
Bin Zhao ◽  
Zhao-Hui Zhang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Biological Nitrogen Removal ◽  
Piggery Wastewater ◽  
Biological Nitrogen

Combined anaerobic digestion and biological nitrogen removal for piggery wastewater treatment: a modelling approach

2008 ◽  
Vol 58 (1) ◽  
pp. 133-141 ◽  
Author(s):  
P. Rousseau ◽  
J.-P. Steyer ◽  
E. I. P Volcke ◽  
N. Bernet ◽  
F. Béline
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Nitrogen Removal ◽  
Biological Nitrogen Removal ◽  
Gas Transfer ◽  
Piggery Wastewater ◽  
Wastewater Treatment Process ◽  
Modelling Framework ◽  
Set Up ◽  
Biological Nitrogen

In order to deal with the environmental problems associated with animal production industrialization and at the same time considering energy costs increasing, a piggery wastewater treatment process consisting of combined anaerobic digestion and biological nitrogen removal by activated sludge was developed. This contribution presents a modelling framework in order to optimize this process. Modified versions of the well established ASM1 and ADM1 models have been used. The ADM1 was extended with biological denitrification. pH calculation and liquid gas-transfer were modified to take into account the effect of associated components. Finally, two interfaces (ADMtoASM and ASMtoADM) were built in order to combine both models. These interfaces set up the COD, nitrogen, alkalinity and charge fractionation between both models. However, for the mass balances between both models, some hypotheses were considered and might be evaluated.

Organic carbon bioavailability: is it a good driver to choose the best biological nitrogen removal process?

2021 ◽  
pp. 147390
Author(s):  
Gabriela Bonassa ◽  
Alice Chiapetti Bolsan ◽  
Camila Ester Hollas ◽  
Bruno Venturin ◽  
Daniela Candido ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Nitrogen Removal ◽  
Biological Nitrogen Removal ◽  
Removal Process ◽  
Biological Nitrogen
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