Effect of aeration rate on performance and stability of algal-bacterial symbiosis system to treat domestic wastewater in sequencing batch reactors

2016 ◽  
Vol 222 ◽  
pp. 156-164 ◽  
Author(s):  
Cong-Cong Tang ◽  
Wei Zuo ◽  
Yu Tian ◽  
Ni Sun ◽  
Zhen-Wei Wang ◽  
...  
Keyword(s):  
Domestic Wastewater ◽  
Aeration Rate ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Bacterial Symbiosis

Efficient and integrated start-up strategy for partial nitrification to nitrite treating low C/N domestic wastewater

2009 ◽  
Vol 60 (12) ◽  
pp. 3243-3251 ◽  
Author(s):  
Jianhua Guo ◽  
Shuying Wang ◽  
Huijun Huang ◽  
Yongzhen Peng ◽  
Shijian Ge ◽  
...  
Keyword(s):  
Domestic Wastewater ◽  
Kinetic Mechanism ◽  
Partial Nitrification ◽  
Nitrifying Bacteria ◽  
Nitrite Accumulation ◽  
Fish Analysis ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Start Up ◽  
Operation Results

Nitrogen removal via the nitrite pathway has the potential of reducing the requirements for aeration consumption and carbon source. However, the development of an efficient and quick start-up strategy for partial nitrification to nitrite has proven difficult in the treatment of low strength wastewater. In this study, the feasibility of partial nitrification achieved by using real-time aeration duration control was not only demonstrated from the kinetic mechanism, but also was validated in three sequencing batch reactors (SBRs) fed with low C/N domestic wastewater. Nitrite accumulation could be achieved when aeration was terminated as soon as an inflexion pH point was reached (the dpH/dt became from negative to positive). The reduction or limitation of the NOB growth could be achieved through aeration duration control, due to leaving no extra time for NOB to convert the accumulated nitrite. The experimental operation results also showed that partial nitrification with nitrite accumulation ratios of over 80% was achieved successfully in these three reactors with process control. Fluorescence in situ hybridization (FISH) analysis indicated the reduction of NOB was achieved and AOB became the dominant nitrifying bacteria. Moreover, an integrated start-up strategy based on aeration duration control was proposed to quickly achieve partial nitrification to nitrite.

Powdered ZELIAC augmented sequencing batch reactors (SBR) process for co-treatment of landfill leachate and domestic wastewater

2014 ◽  
Vol 139 ◽  
pp. 1-14 ◽  
Author(s):  
Amin Mojiri ◽  
Hamidi Abdul Aziz ◽  
Nastaein Q. Zaman ◽  
Shuokr Qarani Aziz ◽  
Mohammad Ali Zahed
Keyword(s):  
Landfill Leachate ◽  
Domestic Wastewater ◽  
Batch Reactors ◽  
Sequencing Batch Reactors

Co-treatment of landfill leachate in laboratory-scale sequencing batch reactors: analysis of system performance and biomass activity by means of respirometric techniques

2014 ◽  
Vol 69 (6) ◽  
pp. 1267-1274 ◽  
Author(s):  
M. Capodici ◽  
D. Di Trapani ◽  
G. Viviani
Keyword(s):  
Landfill Leachate ◽  
Oxygen Uptake Rate ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Ammonia Nitrogen ◽  
Synthetic Wastewater ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Population Average ◽  
Biomass Activity

Aged or mature leachate, produced by old landfills, can be very refractory; for this reason mature leachate is difficult to treat alone, but it can be co-treated with sewage or domestic wastewater. The aim of the study was to investigate the feasibility of leachate co-treatment with synthetic wastewater, in terms of process performance and biomass activity, by means of respirometric techniques. Two sequencing batch reactors (SBRs), named SBR1 and SBR2, were fed with synthetic wastewater and two different percentages of landfill leachate (respectively 10% and 50% v v−1 in SBR1 and SBR2). The results showed good chemical oxygen demand (COD) removal efficiency for both reactors, with average COD removals equal to 91.64 and 89.04% respectively for SBR1 and SBR2. Furthermore, both SBRs showed good ammonia-nitrogen (AN) removal efficiencies, higher than 60%, thus confirming the feasibility of leachate co-treatment with a readily biodegradable wastewater. Significant respiration rates were obtained for the heterotrophic population (average values of maximum oxygen uptake rate equal to 37.30 and 56.68 mg O2 L−1 h−1 respectively for SBR1 and SBR2), thus suggesting the feasibility of leachate co-treatment with synthetic wastewater.

Effect of Aeration Rate on Nutrient Removal from Slaughterhouse Wastewater in Intermittently Aerated Sequencing Batch Reactors

2008 ◽  
Vol 192 (1-4) ◽  
pp. 251-261 ◽  
Author(s):  
Jianping Li ◽  
Mark G. Healy ◽  
Xinmin Zhan ◽  
Daniel Norton ◽  
Michael Rodgers
Keyword(s):  
Nutrient Removal ◽  
Aeration Rate ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Slaughterhouse Wastewater

Comparison of the nutrient removal efficiency of onsite wastewater treatments systems: applications of conventional sand filters and sequencing batch reactors (SBR)

2007 ◽  
Vol 55 (7) ◽  
pp. 109-117 ◽  
Author(s):  
R. Vilpas ◽  
E. Santala
Keyword(s):  
Domestic Wastewater ◽  
In Situ Monitoring ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Sand Filters ◽  
Sand Filter ◽  
Nutrient Removal Efficiency ◽  
One Year ◽  
Filter Bed

When domestic wastewater was treated with different onsite applications of buried sand filters and sequencing batch reactors, good organic matter removal was common and effluent BOD7 concentrations from 5 to 20 mg/l were easily achievable. For total nitrogen, effluent concentrations were usually between 20 and 80 mg/l. Good phosphorus removal, even using special adsorption or precipitation materials, was difficult to achieve and large variations occurred. The median effluent concentration of total phosphorus in the most successful sand filter application was less than 0.1 mg/l and other sand filters and SBRs had the median concentrations varying from 1.7 to 6.7 mg/l. These results are based on one year in situ monitoring of 2 conventional buried sand filters, 6 sand filter applications with special phosphorus adsorbing media within the filter bed, 5 sand filters with separate tertiary phosphorus filtration and 11 small SBRs of three different types. The study was carried out in southern Finland during 2003–05. The whole project included monitoring of more than 60 plants of 20 different treatment types or methods, used in normal conditions to treat domestic wastewater. Evaluation of the different systems was made by comparing the measured effluent concentrations. In addition the effluent concentrations were compared to the discharge limits calculated according to the new Finnish regulation.

Effect of aeration rate on the emission of N2O in anoxic–aerobic sequencing batch reactors (A/O SBRs)

2010 ◽  
Vol 109 (5) ◽  
pp. 487-491 ◽  
Author(s):  
Zhen Hu ◽  
Jian Zhang ◽  
Shanping Li ◽  
Huijun Xie ◽  
Jinhe Wang ◽  
...  
Keyword(s):  
Aeration Rate ◽  
Batch Reactors ◽  
Sequencing Batch Reactors

Nitrite accumulation by aeration controlled in sequencing batch reactors treating domestic wastewater

2004 ◽  
Vol 50 (10) ◽  
pp. 35-43 ◽  
Author(s):  
Y.Z. Peng ◽  
Y. Chen ◽  
C.Y. Peng ◽  
M. Liu ◽  
S.Y. Wang ◽  
...  
Keyword(s):  
Control Strategy ◽  
Nitrogen Concentration ◽  
Domestic Wastewater ◽  
Nitrite Accumulation ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Ammonium Oxidation ◽  
Acclimation Period ◽  
On Line ◽  
Aeration Control

The feasibility of obtaining and keeping stable nitrite accumulation in Sequencing Batch Reactors (SBRs) treating domestic wastewater is studied. The final product of ammonium oxidation is either reproducible nitrate or nitrite depending on the aeration strategy. With the aerobic-anoxic sequence, two SBRs fed with domestic wastewater are operated in parallel. One SBR (SBR1) is controlled by the aeration control strategy, and the other SBR (SBR2) by alternate aeration control strategy. Based on the on-line indirect measurements of DO and pH, the relationship between pH (or DO) and nitrogen concentration (NH4+-N, NO3−-N and NO2−-N) is investigated. The result indicates that pH and DO can be used as control parameters for the real-time aeration control strategy to obtain nitritation in SBR treating domestic wastewater. The result of SBR1 indicates that long-term stable nitritation is possible at 32 ± 1°C. The result of SBR2 indicates that the aeration control strategy is necessary for nitritation during the acclimation period, because the nitrite accumulation disappears when the aeration is extended.

COMPARISON OF DIFFERENT DURATION OF ANAEROBIC AND AEROBIC PHASES ON ACID RED 18 REMOVAL IN SEQUENCING BATCH REACTORS

2016 ◽  
Vol 15 (11) ◽  
pp. 2529-2535
Author(s):  
Mohammad Reza Alavi Moghaddam ◽  
Mohammad Hakimelahi ◽  
Seyed Hossein Hashemi
Keyword(s):  
Batch Reactors ◽  
Sequencing Batch Reactors
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