Simultaneous removal of nitrogen and phosphorus in a two-biofilter system

2000 ◽  
Vol 41 (12) ◽  
pp. 101-106 ◽  
Author(s):  
D. Pak ◽  
W. Chang
Keyword(s):  
Retention Time ◽  
Phosphorus Removal ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Aerobic Condition ◽  
Nitrogen Loading ◽  
Simultaneous Removal ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Factors Affecting

A two-biofilter system operated under alternate conditions of anaerobic/aerobic was tested to simultaneously remove nitrogen and phosphorus from sewage. The factors affecting simultaneous removal of nitrogen and phosphorus by the two-biofilter system were investigated. Those factors appeared to be influent COD/T-N and COD/T-P ratio, nitrogen loading rate and hydraulic retention time. Nitrite and nitrate produced in the biofilter in aerobic condition affected phosphorus removal by the two-biofilter system. The amount of biomass wasted during the backwash procedure also affected total nitrogen and phosphorus removal by the system.

Factors affecting phosphorus removal in two biofilter system treating wastewater from car-washing facility

2000 ◽  
Vol 41 (4-5) ◽  
pp. 487-492 ◽  
Author(s):  
D. Pak ◽  
W. Chang
Keyword(s):  
Phosphorus Removal ◽  
Phosphorus Content ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Aerobic Condition ◽  
Suspended Solid ◽  
Nitrogen Loading ◽  
Operational Parameters ◽  
Factors Affecting ◽  
Biological Filter

A two-biofilter system operated under alternating anaerobic/aerobic conditions was tested to remove nutrient as well as organics from wastewater generated from car-washing facility. The wastewater was characterized by relatively low organic and high phosphorus content. The factors affecting phosphorus removal in the two-biofilter system were investigated. Operational parameters examined in this study were hydraulic retention time, organic, suspended solid and nitrogen loading rate. The factors affecting phosphorus removal in biological filter appeared to be influent COD, COD/T–P, BOD/COD, nitrogen, and SS/T–P. Nitrite and nitrate produced in the biofilter in aerobic condition affected phosphorus removal by the two-biofilter system. The biomass wasted during backwash procedure also affected total phosphorus removal by the system.

A pilot study on nitrogen and phosphorus removal by a modified photostrip process

2000 ◽  
Vol 42 (3-4) ◽  
pp. 199-204 ◽  
Author(s):  
K.-S. Kim ◽  
K.-M. Cho ◽  
H. Choi ◽  
I.S. Kim
Keyword(s):  
Phosphorus Removal ◽  
Loading Rate ◽  
Nitrification Rate ◽  
Aeration Tank ◽  
Simultaneous Removal ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
P Concentration ◽  
Yearly Average ◽  
Recycle Rate

A pilot plant with a capacity of 20∼30m3/day was operated for 10 months for simultaneous removal of nitrogen and phosphorus by a modified Phostrip process. In the process, a denitrification tank was installed before the aeration tank in the Phostrip process, which was developed mainly for phosphorus removal. To maintain the effluent TKN concentration in the range of 1∼3 mg/L, the allowable maximum TKN loading rate in the aeration tank was found to be 0.065 kg TKN/kg MLSS·d. The nitrification rate in the aeration tank increased as the influent COD/TKN ratio declined. The optimal internal recycle rate from the aeration tank to the denitrifier was found to be 2Q when the yearly average COD and TKN concentration of the influent was 197 mg/L and 37.1 mg/L, respectively. To keep the effluent T-P concentration below 1 mg/L, T-P loading to the aeration tank should be less than 0.008 kg T-P/kg MLSS·d at the sludge recycle rate of 0.3Q from the 2nd clarifier to P-stripper. However, the loading should be kept at less than 0.0065 kg T-P/kg MLSS·d at the sludge recycle rate of 0.15Q.

The Influence Factors in Denitrifying Phosphorus Removal

2013 ◽  
Vol 401-403 ◽  
pp. 2084-2087
Author(s):  
Ming Fen Niu ◽  
Si Li ◽  
Hong Jing Jiao ◽  
Jian Wei ◽  
Yuan Yang Sun ◽  
...  
Keyword(s):  
Retention Time ◽  
Phosphorus Removal ◽  
Ph Value ◽  
Influence Factors ◽  
Volume Ratio ◽  
Wastewater Sludge ◽  
Practical Application ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Denitrifying Phosphorus Removal

Denitrifying phosphorus removal can be achieved with the same matrix simultaneous nitrogen and phosphorus removal，is a hot topic of abroad study biological wastewater treatment，This is discussed the Influence factors of anoxic tank NO3- load, dissolved oxygen and the volume ratio of aerobic tank and anoxic tank, pH value of wastewater, sludge retention time (SRT), hydraulic retention time (HRT), mixed liquor suspended solids (MLSS) and temperature on denitrifying phosphorus removal, for denitrifying phosphorus removal process simulation, experimental research and practical application provides a reference and basis.

The Nitrogen and Phosphorus Removal and Sludge Yield Comparative Study under Anaerobic/Aerobic and Anaerobic/Anoxic Conditions

2012 ◽  
Vol 610-613 ◽  
pp. 2068-2073
Author(s):  
Ya Jing Li ◽  
Li Ping Sun ◽  
Min Ji
Keyword(s):  
Phosphorus Removal ◽  
Aerobic Condition ◽  
Anoxic Condition ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Anoxic Conditions ◽  
Significant Difference ◽  
Aerobic And Anaerobic

The nitrogen and phosphorus removal efficiency and effect of different electron acceptors (O2 and NO3-) on the sludge yield were studied through experiments in two SBRs (Sequencing Batch Reactors ) in this paper. The results showed that two systems both had good decontamination effect; the theory value of sludge yield (It was 0.435gVSS/gCOD and 0.402gVSS/gCOD for anaerobic /aerobic and anaerobic/anoxic condition, respectively) was higher than the actual value (It was 0.335gVSS/gCOD and 0.321g VSS/gCOD for anaerobic/aerobic and anaerobic/anoxic condition, respectively); There was no significant difference for the sludge yield under anaerobic/aerobic and anaerobic/anoxic conditions, because the endogenesis respiration of sludge under anaerobic/aerobic condition was stronger consequently more sludge being attenuated (Attenuation coefficient was 0.0081 and 0.0026 for anaerobic/aerobic and anaerobic/anoxic condition, respectively).

Effect of solids retention time on nitrogen and phosphorus removal from municipal wastewater in a sequencing batch membrane bioreactor

2016 ◽  
Vol 38 (7) ◽  
pp. 806-815 ◽  
Author(s):  
Tiago José Belli ◽  
Jossy Karla Brasil Bernardelli ◽  
Rayra Emanuelly da Costa ◽  
João Paulo Bassin ◽  
Miriam Cristina Santos Amaral ◽  
...  
Keyword(s):  
Retention Time ◽  
Phosphorus Removal ◽  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Solids Retention Time ◽  
Solids Retention

Effects of HRT and nitrite/ammonia ratio on anammox discovered in a sequencing batch biofilm reactor

RSC Advances ◽  
2014 ◽  
Vol 4 (97) ◽  
pp. 54798-54804 ◽  
Author(s):  
Ying-Cui Yu ◽  
Yu Tao ◽  
Da-Wen Gao
Keyword(s):  
Retention Time ◽  
Substrate Concentration ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Nitrogen Loading ◽  
Biofilm Reactor ◽  
Anammox Bacteria ◽  
Substrate Effect ◽  
Sequencing Batch Biofilm Reactor ◽  
Key Aspects

There are three key aspects of substrate effect on anaerobic ammonia oxidizing (anammox) bacteria: (1) substrate concentration-based nitrogen loading rate (NLR), (2) hydraulic retention time (HRT)-based NLR and (3) nitrite/ammonia ratio.

scholarly journals EFFECT OF ORGANIC LOADING RATE ON SIMULTANEOUS REMOVAL OF NITROGEN AND PHOSPHORUS FROM AQUATIC PRODUCT PROCESSING WASTEWATER BY ADVANCED A2/O – BAF SYSTEM

2018 ◽  
Vol 54 (4B) ◽  
pp. 200
Author(s):  
Nguyen Xuan Quynh Nhu
Keyword(s):  
Organic Matter ◽  
Retention Time ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Simultaneous Removal ◽  
Organic Loading ◽  
Nitrogen And Phosphorus ◽  
Aquatic Product ◽  
Solids Retention Time ◽  
Solids Retention

Combined system of Anaerobic/Anoxic/Oxic reactor with Biological Aerated Filter (A2/O – BAF) is used to enhance simultaneous removal of nitrogen and phosphorus on aquatic product processing wastewater treatment. A2/O reactor was operated with short solids retention time employed mainly for removal of organic matter and phosphorus together with denitrification and BAF with long solids retention time employed mainly for nitrification. The model of combined A2/O – BAF system made from polyacrylic with the capacity of 49.5 liters was operated with hydraulic retention time decreased from 19.2 to 9.6 hours and organic loading rates increased from 0.50 to 1.0 kgCOD/m3/day.  The results showed that the model not only treated organic matter well but also removed nearly completely both nitrogen and phosphorus. For loading rate of 0.75 kgCOD/m3/day, treatment efficiencies of COD, NH4+-N, TN, TP of the model were the highest as 91.02, 96.82, 84.08, 86.66  %, respectively and output values of these parameters were within the limits of QCVN 11:2008/BTNMT, column A.

Nitrogen and Phosphorus Removal by Activated Sludge Process: A Review

2017 ◽  
Vol 14 (2) ◽  
pp. 99-106 ◽  
Author(s):  
Zhengan Zhang ◽  
Shulin Pan ◽  
Fei Huang ◽  
Xiang Li ◽  
Juanfang Shang ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Activated Sludge Process ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal
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