Simultaneous Removal of Carbon and Nitrogen from Domestic Wastewater in an Aerobic RBC

2010 ◽  
pp. 403-443 ◽  
Author(s):  
Gupta Sudhir Kumar ◽  
Anushuya Ramakrishnan ◽  
Yung-Tse Hung
Keyword(s):  
Domestic Wastewater ◽  
Simultaneous Removal ◽  
Carbon And Nitrogen

scholarly journals Nitrogen Removal in Oligotrophic Reservoir Water by a Mixed Aerobic Denitrifying Consortium: Influencing Factors and Immobilization Effects

2019 ◽  
Vol 16 (4) ◽  
pp. 583 ◽  
Author(s):  
Hanyue Wang ◽  
Tong Wang ◽  
Shangye Yang ◽  
Xueqing Liu ◽  
Liqing Kou ◽  
...  
Keyword(s):  
Carbon Source ◽  
Simultaneous Removal ◽  
Source Water ◽  
Reservoir Water ◽  
Carbon And Nitrogen ◽  
Initial Carbon ◽  
Oligotrophic Water ◽  
Lower Temperature ◽  
Significant Attention ◽  
Immobilized Consortium

Nitrogen pollution in reservoirs has received increasing attention in recent years. Although a number of aerobic denitrifying strains have been isolated to remove nitrogen from eutrophic waters, the situation in oligotrophic water environments has not received significant attention. In this study, a mixed aerobic denitrifying consortium screened from reservoir samples was used to remove nitrogen in an oligotrophic denitrification medium and actual oligotrophic source water. The results showed that the consortium removed 75.32% of nitrate (NO3−-N) and 63.11% of the total nitrogen (TN) in oligotrophic reservoir water during a 24-h aerobic cultivation. More initial carbon source was helpful for simultaneous removal of carbon and nitrogen in the reservoir source water. NO3−-N and TN were still reduced by 60.93% and 46.56% at a lower temperature (10 °C), respectively, though the rates were reduced. Moreover, adding phosphorus promoted bacterial growth and increased TN removal efficiency by around 20%. The performance of the immobilized consortium in source water was also explored. After 6 days of immobilization, approximately 25% of TN in the source water could be removed by the carriers, and the effects could last for at least 9 cycles of reuse. These results provide a good reference for the use of aerobic denitrifiers in oligotrophic reservoirs.

Joint treatment of landfill leachate with municipal wastewater by submerged membrane bioreactor

2009 ◽  
Vol 60 (12) ◽  
pp. 3121-3127 ◽  
Author(s):  
Halil Hasar ◽  
Ubeyde Ipek ◽  
Cumali Kinaci
Keyword(s):  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Domestic Wastewater ◽  
High Strength ◽  
Carbon And Nitrogen ◽  
Submerged Membrane Bioreactor ◽  
Treatment Processes ◽  
Phosphorus Source ◽  
Number Of Treatment ◽  
Joint Treatment

Young leachate was a high strength wastewater with regard to carbon and nitrogen matter, and up to now many researchers have focused on a number of treatment methods to treat the leachate. By using various treatment processes, joint treatment of leachate with domestic wastewater, resulted from same community, is one of the most significant methods because domestic wastewater has either larger mass or lower strength than leachate. In this study, a submerged membrane bioreactor (sMBR) was used for treatment of blending wastewater, including differential mixture ratios of domestic wastewater and leachate. In raw leachate, BOD5/COD was between 0.40 and 0.67 and total phosphorus was between 17 and 24 mg/l. After the leachate was blended with domestic wastewater in the ratios of 1/5–1/20, the influent COD decreased from 8,500–14,200 mg/l to 750–2,400 mg/l as ammonium decreased from 1,100–2,150 mg/l to 30–180 mg/l. The sMBR, which was aerated intermittently, accomplished both COD oxidation and nutrient removal at optimal conditions without adding the external phosphorus source, providing < 15 mg COD/l, <1.3 mg NH4+-N/l, and <2.0 mg P/l on average at solid retention times (SRT) higher than 10 days. Consequently, the results showed the mixture of leachate and domestic wastewater could be an acceptable alternative by means of membrane bioreactor technology.

Performance of a Multipurpose Filter for Simultaneous Removal of Ammonium and Suspended Solids as a Polishing Stage for a Domestic Wastewater Plant Effluent

2010 ◽  
Vol 5 (1) ◽  
Author(s):  
Deniz Alkas ◽  
Bilsen Beler Baykal ◽  
Cumali Kinaci
Keyword(s):  
Natural Zeolite ◽  
Suspended Solids ◽  
Size Range ◽  
Domestic Wastewater ◽  
Filter Material ◽  
Wastewater Effluent ◽  
Ammonium Concentration ◽  
Simultaneous Removal ◽  
Filter Unit ◽  
Solids Removal

A multipurpose filter column was studied as a polishing stage for the simultaneous removal of ammonium and suspended solids from a secondary domestic wastewater effluent. The multipurpose filter consisted of sand as the regular filter material, primarily for the purpose of suspended solids removal, and an ammonium selective natural zeolite, clinoptilolite, for the removal of ammonium. A Turkish clinoptilolite from the Bigadic region was used in the experiments. The capacity of the clinoptilolite was determined by isotherm analysis to be 10.4 mg/g for 20 mg/lt initial wastewater ammonium concentration at pH 7.3 with 0.5-1 mm diameter. In the continuous runs, the multipurpose filter unit was operated down flow with 50% of the unit consisting of clinoptilolite in the upper layer, and 50% sand in the lower both with a grain size range of 0.5-1 mm. The results have revealed that simultaneous removal of 100% of the ammonium and 75% of the suspended solids removal be achieved in the multipurpose filter unit for a working period of 38 hours. The success of this proposal could lend an alternative both for the upgrading of existing treatment plants and for polishing for ammonium and suspended solids rate by using one compact unit.

scholarly journals Effect of Aeration Rates on Removals of Organic Carbon and Nitrogen in Small Onsite Wastewater Treatment System (Johkasou)

2018 ◽  
Vol 147 ◽  
pp. 04008 ◽  
Author(s):  
Joni Aldilla Fajri ◽  
Tomonari Fujisawa ◽  
Yenni Trianda ◽  
Yasushi Ishiguro ◽  
Guangyu Cui ◽  
...  
Keyword(s):  
Organic Matter ◽  
Oxygen Supply ◽  
Domestic Wastewater ◽  
Aeration Rate ◽  
Simultaneous Nitrification And Denitrification ◽  
Carbon And Nitrogen ◽  
Onsite Wastewater ◽  
Onsite Wastewater Treatment System ◽  
Before And After ◽  
Onsite Wastewater Treatment

Onsite application of oxygen supply in domestic wastewater system may be influenced by several factors that can inhibit the oxidation and nitrification processes. In this study, the influence of aeration rate on the Johkasou performance was focused using two Johkasou facilities serving up to five persons household. In the Johkasou A (JO-A) system, we increased the aeration rate from 30 to 63 L.min-1 whereas, in the Johkasou B (JO-B), it was decreased from 59 to 34 L.min-1. Water and sludge samples were collected from the anaerobic-anoxic-oxic zones before and after adjustment of the aeration rate measured for organic matters and nitrogen parameters. Increasing the aeration rate in JO-A resulted in a high removal of organic matter (82.5%) and nitrogen (60.3%) compared to decreasing of aeration rate in JO-B (52.0% and 33.0%, respectively). Simultaneous nitrification and denitrification (SND) exhibited a maximum percentage when the aeration rate was increased compared to decreasing of aeration rate. These results indicate that application of a high aeration rate increases removal of organic matter and nitrogen and enhances ammonia transformation. It is therefore recommended to apply high aeration rates in Johkasou system.

ANFIS Modelling of Carbon and Nitrogen Removal in Domestic Wastewater Treatment Plant

2014 ◽  
Vol 67 (5) ◽  
Author(s):  
Muhammad Sani Gaya ◽  
N. Abdul Wahab ◽  
Y. M. Sam ◽  
Sahratul Izah Samsudin
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Feed Forward Neural Network ◽  
Anfis Model ◽  
Efficient Operation ◽  
Carbon And Nitrogen

Wastewater treatment plant involves highly complex and uncertain processes, which are quite difficult to forecast. However, smooth and efficient operation of the treatment plant depends on an appropriate model capable of describing accurately the dynamic nature of the system. Most of the existing models were applied to industrial wastewater treatment plants. Therefore, this paper proposed an ANFIS model for carbon and nitrogen removal in the Bunus regional sewage wastewater treatment plant, Kuala Lumpur, Malaysia. For comparison, feed-forward neural network is used. Simulation results revealed that the ANFIS model demonstrated slightly better prediction capability in all the considered variables, chemical oxygen demand (COD), suspended solids (SS) and ammonium nitrogen (NH4-N) as compared to the FFNN model, thus proving that the proposed ANFIS model is reliable and useful to the wastewater treatment plant. 

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