Performance of aerated submerged biofilm reactor packed with local scoria for carbon and nitrogen removal from municipal wastewater

2013 ◽  
Vol 143 ◽  
pp. 476-482 ◽  
Author(s):  
Saber A. El-Shafai ◽  
Waleed M. Zahid
Keyword(s):  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Biofilm Reactor ◽  
Carbon And Nitrogen

Exploring carbon and nitrogen removal capacity of membrane aerated biofilm reactor for low-strength municipal wastewater treatment

2022 ◽  
Author(s):  
Li-Qiu Zhang ◽  
Xing Jiang ◽  
Hongwei Rong ◽  
Chun-Hai Wei ◽  
Min Luo ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Biofilm Reactor ◽  
Low Energy ◽  
Municipal Wastewater Treatment ◽  
Carbon And Nitrogen ◽  
Removal Capacity ◽  
Low Energy Consumption ◽  
Stage Process

As one stage process capable of simultaneous carbon and nitrogen removal, membrane aerated biofilm reactor (MABR) has advantages of low energy consumption from bubble-free aeration and no extra carbon dosage...

Phosphorus and Nitrogen Removal in Moving-Bed Sequencing Batch Biofilm Reactors

1999 ◽  
Vol 40 (4-5) ◽  
pp. 169-176 ◽  
Author(s):  
Giuseppe Pastorelli ◽  
Roberto Canziani ◽  
Luca Pedrazzi ◽  
Alberto Rozzi
Keyword(s):  
Organic Carbon ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Phosphorus Uptake ◽  
Biofilm Reactor ◽  
Municipal Wastewater Treatment ◽  
Biological Phosphorus Removal ◽  
Nitrogen And Phosphorus ◽  
Limit Values ◽  
Moving Bed

A pilot moving-bed sequencing batch biofilm reactor (MBSBBR) fed with primary settled wastewater, was used in order to study organic carbon, phosphorus and nitrogen removal with and without external carbon sources. Patented KMT® polyethylene biofilm carriers were used. Organic carbon uptake and phosphorus release has been achieved in the anaerobic phase of the cycle, while nitrification, simultaneous denitrification (i.e., anoxic respiration of sequestered COD in the inner layer of the biofilm) and phosphorus uptake was observed in the aerobic phase. A stable biological phosphorus removal could be achieved only with an external carbon source. Since the process proved flexible and reliable, it is suitable for full scale application to municipal wastewater treatment plants (WWTPs), in order to meet EU total nitrogen and phosphorus limit values for discharge into sensitive receiving waters.

scholarly journals Effects of carbon sources, COD/NO2−-N ratios and temperature on the nitrogen removal performance of the simultaneous partial nitrification, anammox and denitrification (SNAD) biofilm

2017 ◽  
Vol 75 (7) ◽  
pp. 1712-1721 ◽  
Author(s):  
Zhaoming Zheng ◽  
Yun Li ◽  
Jun Li ◽  
Yanzhuo Zhang ◽  
Wei Bian ◽  
...  
Keyword(s):  
Carbon Source ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Inorganic Nitrogen ◽  
Carbon Sources ◽  
Biofilm Reactor ◽  
Partial Nitrification ◽  
Anammox Bacteria ◽  
Coupling Process ◽  
Anammox Activity

The aim of the present work was to evaluate the effects of carbon sources and chemical oxygen demand (COD)/NO2−-N ratios on the anammox–denitrification coupling process of the simultaneous partial nitrification, anammox and denitrification (SNAD) biofilm. Also, the anammox activities of the SNAD biofilm were investigated under different temperature. Kaldnes rings taken from the SNAD biofilm reactor were operated in batch tests to determine the nitrogen removal rates. As a result, with the carbon source of sodium acetate, the appropriate COD/NO2−-N ratios for the anammox–denitrification coupling process were 1 and 2. With the COD/NO2−-N ratios of 1, 2, 3, 4 and 5, the corresponding NO2−-N consumption via anammox was 87.1%, 52.2%, 29.3%, 23.7% and 16.3%, respectively. However, with the carbon source of sodium propionate and glucose, the anammox bacteria was found to perform higher nitrite competitive ability than denitrifiers at the COD/NO2−-N ratio of 5. Also, the SNAD biofilm could perform anammox activity at 15 °C with the nitrogen removal rate of 0.071 kg total inorganic nitrogen per kg volatile suspended solids per day. These results indicated that the SNAD biofilm process might be feasible for the treatment of municipal wastewater at normal temperature.

Pilot testing and preliminary design of moving bed biofilm reactors for nitrogen removal at the FREVAR wastewater treatment plant

2000 ◽  
Vol 41 (4-5) ◽  
pp. 13-20 ◽  
Author(s):  
B. Rusten ◽  
B.G. Hellström ◽  
F. Hellström ◽  
O. Sehested ◽  
E. Skjelfoss ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Wastewater Treatment Plant ◽  
Pilot Plant ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Biofilm Reactor ◽  
Nitrification Rate ◽  
Total N ◽  
Moving Bed

A moving bed biofilm reactor (MBBR) pilot plant, using Kaldnes type K1 biofilm carriers, was tested for nitrogen removal at the FREVAR wastewater treatment plant. The pilot plant was fed primary treated municipal wastewater, at temperatures from 4.8 to about 20°C. The results showed that a reasonable design nitrification rate will be 190 g TKN/m3d, at 10°C and a reactor pH≥7.0. Pre-denitrification was very dependent on the concentration of readily biodegradable organic matter and the amount of oxygen in the influent to the first anoxic MBBR. It was found that a MBBR process for nitrogen removal at FREVAR will require a total reactor volume corresponding to an empty bed hydraulic retention time of 4–5 hours at average design influent flow. This was based on an influent concentration of 25 mg total N/l, 70% annual average removal of total N and a treatment process consisting of primary treatment, MBBRs with combined pre- and post-denitrification, and followed by coagulation/flocculation and a final solids separation stage.

Municipal wastewater treatment through an aerobic biofilm SBR integrated with a submerged filtration bed

2009 ◽  
Vol 59 (5) ◽  
pp. 917-926 ◽  
Author(s):  
Kai Yang ◽  
Jiajie He ◽  
Mark Dougherty ◽  
Xiaojun Yang ◽  
Lu Li
Keyword(s):  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Warm Season ◽  
Cold Season ◽  
Biofilm Reactor ◽  
Secondary Effluent ◽  
Municipal Wastewater Treatment ◽  
Nitrogen And Phosphorus ◽  
Anthracite Coal

A biofilm reactor and a gravitational filtration bed were integrated as a sequencing batch reactor (SBR) to aerobically treat a municipal wastewater. Polyacrylonitrile balls (50 mm diameter, 90% porosity) were filled into the upper part of the SBR as biofilm attaching materials and anthracite coal (particle size ∼1.17 mm) was placed into the lower part as filter media. The SBR was aerated during filling and reaction phases, followed by a 10 min discharge phase during which the wastewater went through the filtration bed without aeration. The SBR was tested with raw wastewater from a municipal WWTP in Wuhan, China from July 2006 to January 2007, during both a warm season and a cold season. The SBR showed a capability to accept COD and turbidity fluctuations in the receiving wastewater. Seasonal influence on COD and nitrogen removal by the biofilm reactor was significant. Nitrogen and phosphorus removals were limited by COD levels in the wastewater. The filtration process removed considerable COD, nitrogen, phosphorus, and turbidity. The overall SBR effluent quality consistently satisfied the national secondary effluent discharge standard of China, except for total phosphorus. An anaerobic phase before the aerobic reaction is proposed to improve phosphorus and nitrogen removal. The filter normally required a backwash every seven days and the water needed for backwash was less than 4% of the wastewater treated by the SBR. This experiment provides information needed for further investigation to improve performance of the SBR.

scholarly journals Enhanced carbon and nitrogen removal in an integrated anaerobic/anoxic/aerobic-membrane aerated biofilm reactor system

RSC Advances ◽  
2020 ◽  
Vol 10 (48) ◽  
pp. 28838-28847
Author(s):  
Zhiye Sun ◽  
Mei Li ◽  
Guofeng Wang ◽  
Xiaojun Yan ◽  
Yi Li ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Pilot Scale ◽  
Biofilm Reactor ◽  
Reactor System ◽  
Carbon And Nitrogen ◽  
System P

A pilot-scale anaerobic/anoxic/aerobic-membrane aerated biofilm reactor (A2/O-MABR) system was constructed to enhance carbon and nitrogen removal.

Total nitrogen removal in two-step biofiltration

2000 ◽  
Vol 41 (4-5) ◽  
pp. 65-68 ◽  
Author(s):  
R. Pujol ◽  
S. Tarallo
Keyword(s):  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Full Scale ◽  
Carbon And Nitrogen ◽  
Loading Rates ◽  
Complete Treatment ◽  
In Series ◽  
Total Nitrogen Removal ◽  
One Year

A one-year study was carried out on two semi-industrial submerged up-flow biofilters - a pre-denitrification (pre-DN) step followed by a nitrifying (N) step, designed to treat the primary settled municipal wastewater of a full scale plant for both carbon and nitrogen removal. Performances of the pre-DN step have been investigated showing high removal denitrifying capacities – 1 to 1.2 kg NO3−–N removed per m3 of reactor per day–, obtained with high TSS and carbon loading rates, at a water velocity up to 21.5 m3/ m2.h. The complete treatment plant – primary settlement + pre-DN/N loop – has demonstrated a nitrogen removal efficiency ranging from 70% without any additional carbon, up to 85% with methanol. COD and TSS removal rates were 91% and 97% respectively. The above results show that two submerged biofilters in series form a treatment line suitable for nitrogen removal. This technical choice leads to very compact full scale plants such as Ahlen WWTP (Germany, 85 000 PE).

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