Laboratory Studies of Ammonia Nitrogen Removal in Wastewater from Ammonia Industry by Struvite Precipitation

Chemically coagulated sewage water gives an effluent low in both suspended matter and organics. To use chemical precipitation as the first step in waste water treatment improves nitrification in the following biological stage. The precipitated sludge contains 75% of the organic matter in the sewage and can by hydrolysis be converted to readily degradable organic matter, which presents a valuable carbon source for the denitrification process. This paper will review experiences from full-scale applications as well as pilot-plant and laboratory studies.

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Application of RSM to optimize the recovery of ammonia nitrogen from high chromium effluent produced in vanadium industry using struvite precipitation

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2021.106318 ◽

2021 ◽

pp. 106318

Author(s):

Suying Zhou ◽

Mengge Dong ◽

Xueyong Ding ◽

Xiangxin Xue ◽

He Yang

Keyword(s):

Ammonia Nitrogen ◽

High Chromium ◽

Struvite Precipitation

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Nitrifier Augmentation for High Ammonia Nitrogen Removal by Aerobic Granular Sludge at Low Temperatures

CLEAN - Soil Air Water ◽

10.1002/clen.201400110 ◽

2016 ◽

Vol 44 (5) ◽

pp. 525-531 ◽

Cited By ~ 5

Author(s):

Shuo Wang ◽

Qianqian Yang ◽

Wenxin Shi ◽

Shuili Yu ◽

Yan Wang ◽

...

Keyword(s):

Nitrogen Removal ◽

Low Temperatures ◽

Granular Sludge ◽

Ammonia Nitrogen ◽

Aerobic Granular Sludge ◽

High Ammonia

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Synthesis of coal cinder balls and its application for CODCr and ammonia nitrogen removal from aqueous solution

Desalination and Water Treatment ◽

10.1080/19443994.2015.1130653 ◽

2015 ◽

Vol 57 (46) ◽

pp. 21781-21793 ◽

Cited By ~ 7

Author(s):

Yongmei Wang ◽

Weijun Tian ◽

Chenglin Wu ◽

Jie Bai ◽

Yangguo Zhao

Keyword(s):

Aqueous Solution ◽

Nitrogen Removal ◽

Ammonia Nitrogen

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Combined organic carbon and complete nitrogen removal using anaerobic and aerobic upflow filters

Water Science & Technology ◽

10.2166/wst.1994.0629 ◽

1994 ◽

Vol 30 (12) ◽

pp. 297-306 ◽

Cited By ~ 31

Author(s):

Joseph Akunna ◽

Claude Bizeau ◽

René Moletta ◽

Nicolas Bernet ◽

Alain Héduit

Keyword(s):

Organic Carbon ◽

Removal Efficiency ◽

Nitrogen Removal ◽

Nitrogen Loss ◽

Ammonia Nitrogen ◽

Cod Removal ◽

Cod Removal Efficiency ◽

Treated Effluent ◽

Treated Effluents ◽

Aerobic And Anaerobic

Two laboratory upflow aerobic and anaerobic filters fed with synthetic wastewaters were used to study firstly the effects of aeration rate on the nitrification of anaerobically pre-treated effluents and secondly the effects of recycle-to-influent ratios on methane production rate, denitrification and nitrification performances of a combined aerobic and anaerobic wastewater treatment process. Nitrification of anaerobically pre-treated effluent was accompanied by aerobic post-treatment for residual COD removal. A comparison of nitrification performances using autotrophic medium and anaerobically pre-treated effluents (containing 1203 mg COD 1−1) with the same ammonia nitrogen concentration of about 300 mg NH4-N 1−1 showed that 3% of added ammonia nitrogen was assimilated by autotrophic nitrifiers during nitrification of the autotrophic medium while up to 30% was assimilated by both nitrifiers and heterotrophs during organic carbon removal and nitrification of anaerobically pre-treated effluent. Furthermore, it was suspected that significant nitrogen loss through denitrification occured in the aerobic filter especially at low aeration rates. In the study of the combined aerobic-anaerobic system, maximum ammonia nitrogen removal of 70% through denitrification was obtained at recycle-to-influent ratios of 4 and 5. COD removal efficiency in the anaerobic filter decreased from 77 to 60% for recycle-to-influent ratios of zero to 5. Overall COD removal efficiency of the entire system was constant at about 99% due to heterotrophic COD removal in the aerobic filter.

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Research on Nitrogen Removal Performance of Leachate Treatment of WSIP Reactor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.55-57.789 ◽

2011 ◽

Vol 55-57 ◽

pp. 789-795

Author(s):

Xiu Ju Duan ◽

Qiang He ◽

Ya Li Liu

Keyword(s):

Nitrogen Removal ◽

Biological Treatment ◽

Orthogonal Experiment ◽

Ammonia Nitrogen ◽

Ammonia Removal ◽

Leachate Treatment ◽

Treatment Performance ◽

Biomass Retention ◽

Nitrification And Denitrification

This thesis put forward the treatment concept of “without Biomass Retention Sequential Batch Intensified Pretreatment (WSIP)” in leachate treatment, for sake of improving performance of nitrogen removal, optimizing excess water’s nutritional ratio and benefitting the follow-up aerobic biological treatment. Based on orthogonal experiment of WSIP Reactor’s leachate treatment performance, Conclusions can be drew: the removal performance of ammonia nitrogen and TN is higher of WSIP, in which short-cut nitrification and denitrification can be realized; HRT, DO and sequential period are remarkable factors of ammonia removal performance, TN removal performance and realization of short-cut nitrification and denitrification; In normal temperature, the most perfect functional parameter of WSIP Reactor is: HRT=4d, DO=0.75mg/L and sequential period is 6h.

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