scholarly journals An Ana-Ano-MBR system for nutrient removal from brewery wastewater at various nitrate recirculation ratios

2019 ◽  
Vol 2 (2) ◽  
pp. 5-11
Author(s):  
Thien Nu Thai Van ◽  
Hung Viet Dang ◽  
Hoa Thi Thanh Nguyen
Keyword(s):  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Membrane Bioreactor ◽  
Loading Rate ◽  
National Standards ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Brewery Wastewater ◽  
Operational Conditions ◽  
Low Phosphorus

Anaerobic and anoxic variations were combined with membrane bioreactor to form an Anaerobic/Anoxic configuration in MBR-based (Ana-Ano-MBR) system for improving the system performance in terms of organic degradation and nutrient removal from brewery wastewater. The model of Ana-Ano-MBR system made from polyacrylic with the capacity of 42 liters was operated with organic loading rate of 0.75 kgCOD/m3.day. The results showed that for the nitrate recycling ratios of 100, 200, 300%, average NH4+-N and TN removal efficiencies of the model were 95.1 and 76.6, 98.5 and 89.6, 98.9 and 90.2%, respectively, and the output values of NH4+-N and TN were within the limits of Vietnam National Standards (QCVN 40:2011/BTNMT, column A). Treatment efficiencies of COD and TP were over 90% and below 60%, respectively, during the whole experiment period. Low phosphorus removal efficiency was the drawback of Ana-Ano-MBR system due to the lack of appropriate system configuration and operational conditions for PAOs’ growth and activity.

Fouling in a novel airlift oxidation ditch membrane bioreactor (AOXMBR) at different high organic loading rate

2013 ◽  
Vol 105 ◽  
pp. 69-78 ◽  
Author(s):  
Farshid Pajoum Shariati ◽  
Mohammad Reza Mehrnia ◽  
Mohammad Hossein Sarrafzadeh ◽  
Sara Rezaee ◽  
Alain Grasmick ◽  
...  
Keyword(s):  
Membrane Bioreactor ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Oxidation Ditch ◽  
Organic Loading ◽  
Airlift Oxidation Ditch

The Potential of Phosphorus Removal in UASB Reactor

2011 ◽  
Vol 130-134 ◽  
pp. 3515-3517
Author(s):  
Ping Lu ◽  
Tao Ding ◽  
Jin Ye Li ◽  
Jin Xia Mu
Keyword(s):  
Phosphorus Removal ◽  
Loading Rate ◽  
Removal Rate ◽  
Uasb Reactor ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Effluent Concentration ◽  
Biological Phosphorus ◽  
Main Factor

The potential of phosphorus removal rate was investigated using a lab scale UASB reactor The volumetric phosphorus removal rate was up to 20 mgP/L•d, and the phosphorus effluent concentration was below 0.5 mgP/L under high organic loading rate. Biological phosphorus assimilation could be the main pathways of phosphorus removal in UASB reactor, and the organic loading rate could be the main factor affecting phosphorus removal.

Nitrogen removal from high organic loading wastewater in modified Ludzack–Ettinger configuration MBBR system

2015 ◽  
Vol 72 (8) ◽  
pp. 1274-1282 ◽  
Author(s):  
Mojtaba Torkaman ◽  
Seyed Mehdi Borghei ◽  
Sepehr Tahmasebian ◽  
Mohammad Reza Andalibi
Keyword(s):  
Loading Rate ◽  
Oxygen Demand ◽  
Biofilm Reactor ◽  
Denitrification Rate ◽  
Synthetic Wastewater ◽  
Organic Loading Rate ◽  
Nitrification Rate ◽  
Organic Loading ◽  
Operational Conditions ◽  
Aerobic Reactor

A moving bed biofilm reactor with pre-denitrification configuration was fed with a synthetic wastewater containing high chemical oxygen demand (COD) and ammonia. By changing different variables including ammonium and COD loading, nitrification rate in the aerobic reactor and denitrification rate in the anoxic reactor were monitored. Changing the influent loading was achieved via adjusting the inlet COD (956–2,096 mg/L), inlet ammonium (183–438 mg/L), and hydraulic retention time of the aerobic reactor (8, 12, and 18 hours). The overall organic loading rate was in the range of 3.60–17.37 gCOD/m2·day, of which 18.5–91% was removed in the anoxic reactor depending on the operational conditions. Considering the complementary role of the aerobic reactor, the overall COD removal was in the range 87.3–98.8%. In addition, nitrification rate increased with influent ammonium loading, the maximum rate reaching 3.05 gNH4/m2·day. One of the most important factors affecting nitrification rate was influent C:N entering the aerobic reactor, by increasing which nitrification rate decreased asymptotically. Nitrate removal efficiency in the anoxic reactor was also controlled by the inlet nitrate level entering the anoxic reactor. Furthermore, by increasing the nitrate loading rate from 0.91 to 3.49 gNO/m3·day, denitrification rate increased from 0.496 to 2.47 gNO/m3·day.

Enhanced removal of chemical oxygen demand, nitrogen and phosphorus using the ameliorative anoxic/anaerobic/oxic process and micro-electrolysis

2012 ◽  
Vol 66 (4) ◽  
pp. 850-857 ◽  
Author(s):  
K. Q. Bao ◽  
J. Q. Gao ◽  
Z. B. Wang ◽  
R. Q. Zhang ◽  
Z. Y. Zhang ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Oxygen Demand ◽  
Synthetic Wastewater ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Nitrogen And Phosphorus ◽  
Operational Conditions ◽  
Removal Efficiencies

Synthetic wastewater was treated using a novel system integrating the reversed anoxic/anaerobic/oxic (RAAO) process, a micro-electrolysis (ME) bed and complex biological media. The system showed superior chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) removal rates. Performance of the system was optimised by considering the influences of three major controlling factors, namely, hydraulic retention time (HRT), organic loading rate (OLR) and mixed liquor recirculation (MLR). TP removal efficiencies were 69, 87, 87 and 83% under the HRTs of 4, 8, 12 and 16 h. In contrast, HRT had negligible effects on the COD and TN removal efficiencies. COD, TN and TP removal efficiencies from synthetic wastewater were 95, 63 and 87%, respectively, at an OLR of 1.9 g/(L·d). The concentrations of COD, TN and TP in the effluent were less than 50, 15 and 1 mg/L, respectively, at the controlled MLR range of 75–100%. In this system, organics, TN and TP were primarily removed from anoxic tank regardless of the operational conditions.

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