Denitrification in a carbon and nitrogen removal system for leachate treatment: Performance of a upflow sludge blanket (USB) reactor

1999 ◽  
Vol 40 (8) ◽  
Keyword(s):  
Nitrogen Removal ◽  
Leachate Treatment ◽  
Carbon And Nitrogen ◽  
Treatment Performance ◽  
Removal System

Research on Nitrogen Removal Performance of Leachate Treatment of WSIP Reactor

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.

Development of New Nitrogen Removal System Using Nitrifying Bacteria Immobilized in Synthetic Resin Pellets

1991 ◽  
Vol 23 (4-6) ◽  
pp. 681-690 ◽  
Author(s):  
Kazuhiro Tanaka ◽  
Minoru Tada ◽  
Takashi Kimata ◽  
Shouji Harada ◽  
Yuhko Fujii ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Synthetic Polymer ◽  
Nitrifying Bacteria ◽  
Biological Nitrogen Removal ◽  
Synthetic Resin ◽  
Treatment Performance ◽  
Microorganism Immobilization ◽  
Biological Nitrogen ◽  
Immobilization Method ◽  
Removal System

A newly developed process applying a technique of microorganism immobilization to biological nitrogen removal is reported. Nitrifiers immobilized in 2 to 3 mm diameter polyethylene-glycol resin (Nitrifying pellets) are mixed with activated sludge in the nitrification tanks to promote quick nitrification. Due to the high nitrifying activity of the pellets, nitrification of municipal wastewaters is completed within a few hours. This paper introduces the synthetic polymer and immobilization method suited to nitrifiers, the conditions for pellet fluidization, the activity of nitrifying pellets and its treatment performance as a nitrogen removal process.

Treatment of Wastewater with Different Ratios of Carbon to Nitrogen Using an Enhanced Nitrogen Removal System of Constructed Wetland

2013 ◽  
Vol 864-867 ◽  
pp. 1287-1292
Author(s):  
Min Tao ◽  
Qi Shuo Wang ◽  
Ji Guang Li ◽  
Juan Juan Qu ◽  
Ya Qun Zhan ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Constructed Wetland ◽  
Intermittent Aeration ◽  
High Concentration ◽  
Low Concentration ◽  
Carbon And Nitrogen ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Better Than ◽  
Removal System

An enhanced nitrogen removal system of constructed wetland has been established, and for which kind of nitrogen containing wastewater was suitable to be treated by such enhanced system was also investigated. The results show that when co-controlled by intermittent aeration and carbon source addition, dissolved oxygen concentration and process carbon-nitrogen ratio in enhanced system were improved, meanwhile TN removal capability was enhanced. For wastewater that contains low concentration of carbon and nitrogen, or low concentration of carbon but high concentration of nitrogen, or high concentration of carbon and nitrogen, or high concentration of carbon and low concentration of nitrogen, the average removal efficiency of COD, TN, NH4+-N, NO3--N and TP in enhanced system were 68.1%, 78.2%, 70.8%, 86.7% and 71.2%, of which the purification capability was significantly better than that of the control system. The enhanced system is especially suitable for treatment of wastewater that contains low concentration of carbon and high nitrogen.

Denitrification in a Carbon and Nitrogen Removal System for Leachate Treatment: Performance of a Upflow Sludge Blanket (USB) Reactor

1999 ◽  
Vol 40 (8) ◽  
pp. 145-151 ◽  
Author(s):  
Liliana Borzacconi ◽  
Gisela Ottonello ◽  
Elena Castelló ◽  
Heber Pelaez ◽  
Augusto Gazzola ◽  
...  
Keyword(s):  
Complete System ◽  
Carbon Sources ◽  
Uasb Reactor ◽  
Leachate Treatment ◽  
N Removal ◽  
Start Up ◽  
Aerobic Reactor ◽  
C And N ◽  
Reactor Operating ◽  
Removal System

The performance of a bench scale upflow sludge bed (USB) denitrifying reactor was evaluated in order to integrate it into a C and N removal system for Sanitary Landfill Leachate. The raw leachate used presented COD and NH4-N average values of 30000 mg/l and 1000 mg/l, respectively. The complete system comprises in addition an UASB reactor and a nitrifying RBC. A portion of the aerobic reactor effluent was recycled into the denitrification stage and some raw leachate was also added as an additional C source. In order to obtain operating parameters the denitrifying reactor was operated alone. Sludge from an aerobic reactor (RBC) treating raw leachate was used as inoculum. Shortly after the start up, good granulation of the sludge bed was observed. Using raw leachate and UASB outlet as carbon sources with COD/NO3-N ratios of 4 and 12, respectively, denitrification efficiencies of about 90% were reached. A sludge yield of 0.16 gVSS/gCODremoved was obtained operating with raw leachate. For the anoxic reactor operating in the complete system, denitrification efficiencies of 90% were also achieved. A nitrogen gas recycle was a successful way to avoid frequently observed sludge bed rising problems.

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