Two-phase photoperiodic cultivation of algal–bacterial consortia for high biomass production and efficient nutrient removal from municipal wastewater

2016 ◽  
Vol 200 ◽  
pp. 867-875 ◽  
Author(s):  
Chang Soo Lee ◽  
Hyung-Seok Oh ◽  
Hee-Mock Oh ◽  
Hee-Sik Kim ◽  
Chi-Yong Ahn
Keyword(s):  
Biomass Production ◽  
Nutrient Removal ◽  
Municipal Wastewater ◽  
High Biomass ◽  
Two Phase ◽  
Bacterial Consortia

Feasibility Study on Biological Nutrient Removal in Sequencing Batch Reactor Treating Municipal Wastewater

2020 ◽  
Vol 17 (2) ◽  
pp. 946-949
Author(s):  
Samaneh Alijantabar Aghouzi ◽  
Thomas S. Y. Choong ◽  
M. I. Aida Isma
Keyword(s):  
Nutrient Removal ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Ammonia Nitrogen ◽  
Biological Nutrient Removal ◽  
Nitrogen And Phosphorus ◽  
Bacterial Consortia ◽  
Aeration Time ◽  
Working Volume

This study elucidates the performance of sequencing batch reactor for nutrient removal from municipal wastewater. The removal of COD, ammonia nitrogen and phosphorus were investigated. The SBR with a working volume of 5 L was operated for 6 hours, with 5 min fill, 30 min settle and 5 min effluent withdrawal. The remaining time in each cycle was 90 min anaerobic phase, 130 min anoxic phase and 110 min aerobic phase. The experiment was repeated with a longer aeration time of 180 min resulting to prolong the duration cycle. In the aerobic phase, dissolved oxygen was kept in the range of more than 2 mg/L. During batch operation, the system attained stability and had a removal efficiency for ammonia nitrogen, COD and phosphorus of 51.36%, 83.33% and 99.53%, respectively. Extending the aeration period improved ammonia nitrogen removal to 54.27%. It should be noted that the stability of the granular biomass agglomerates highly depending on the bacterial consortia. The particle size of sludge reduced from 60.26 μm to 39.00 μm in 60 days. It was observed that degranulation process and biomass loss was unavoidable.

Cultivation of microalgae species in tertiary municipal wastewater supplemented with CO2 for nutrient removal and biomass production

2013 ◽  
Vol 58 ◽  
pp. 142-148 ◽  
Author(s):  
Min-Kyu Ji ◽  
Reda A.I. Abou-Shanab ◽  
Seong-Heon Kim ◽  
El-Sayed Salama ◽  
Sang-Hun Lee ◽  
...  
Keyword(s):  
Biomass Production ◽  
Nutrient Removal ◽  
Municipal Wastewater

scholarly journals Evaluation of nutrients removal (NO3-N, NH3-N and PO4-P) with Chlorella vulgaris, Pseudomonas putida, Bacillus cereus and a consortium of these microorganisms in the treatment of wastewater effluents

2017 ◽  
Vol 76 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Abril Gómez-Guzmán ◽  
Sergio Jiménez-Magaña ◽  
A. Suggey Guerra-Rentería ◽  
César Gómez-Hermosillo ◽  
F. Javier Parra-Rodríguez ◽  
...  
Keyword(s):  
Carbon Source ◽  
Bacillus Cereus ◽  
Pseudomonas Putida ◽  
Biomass Production ◽  
Chlorella Vulgaris ◽  
Nutrient Removal ◽  
Municipal Wastewater ◽  
Physicochemical Characteristics ◽  
Nutrients Removal ◽  
External Carbon Source

In this research removal of NH3-N, NO3-N and PO4-P nutrients from municipal wastewater was studied, using Chlorella vulgaris, Pseudomonas putida, Bacillus cereus and an artificial consortium of them. The objective is to analyze the performance of these microorganisms and their consortium, which has not been previously studied for nutrient removal in municipal wastewater. A model wastewater was prepared simulating the physicochemical characteristics found at the wastewater plant in Chapala, Mexico. Experiments were carried out without adding an external carbon source. Results indicate that nutrient removal with Chlorella vulgaris was the most efficient with a removal of 24.03% of NO3-N, 80.62% of NH3-N and 4.30% of PO4-P. With Bacillus cereus the results were 8.40% of NO3-N, 28.80% of NH3-N and 3.80% of PO4-P. The removals with Pseudomonas putida were 2.50% of NO3-N, 41.80 of NH3-N and 4.30% of PO4-P. The consortium of Chlorella vulgaris–Bacillus cereus–Pseudomonas putida removed 29.40% of NO3-N, 4.2% of NH3-N and 8.4% of PO4-P. The highest biomass production was with Bacillus cereus (450 mg/l) followed by Pseudomonas putida (444 mg/l), the consortium (205 mg/l) and Chlorella vulgaris (88.9 mg/l). This study highlights the utility of these microorganisms for nutrient removal in wastewater treatments.

Implications of nutrient removal and biomass production by native and augmented algal populations at a municipal wastewater treatment plant

2014 ◽  
Vol 70 (7) ◽  
pp. 1152-1160
Author(s):  
Ivy L. C. Drexler ◽  
Sascha Bekaan ◽  
Yasmin Eskandari ◽  
Daniel H. Yeh
Keyword(s):  
Wastewater Treatment ◽  
Biomass Production ◽  
Nutrient Removal ◽  
Wastewater Treatment Plant ◽  
Native Species ◽  
Municipal Wastewater ◽  
Algal Species ◽  
Treatment Plant ◽  
Phosphorus Adsorption ◽  
Bod Removal

Algal monocultures (Chlorella sorokiniana and Botryococcus braunii) and algal communities native to clarifiers of a wastewater treatment plant were batch cultivated in (1) clarified effluent following a biochemical oxygen demand (BOD) removal reactor post-BOD removal clarified effluent (PBCE), (2) clarified effluent following a nitrification reactor post-nitrification clarified effluent (PNCE), and (3) a reference media (RM). After 12 days, all algal species achieved nitrogen removal between 68 and 82% in PBCE and 37 and 99% in PNCE, and phosphorus removal between 91 and 100% in PBCE and 60 and 100% in PNCE. The pH of the wastewater samples increased above 9.8 after cultivation of each species, which likely aided ammonia volatilization and phosphorus adsorption. Both monocultures grew readily with wastewater as a feedstock, but B. braunii experienced significant crowding from endemic fauna. In most cases, native algal species' nutrient removal efficiency was competitive with augmented algal monocultures, and in some cases achieved a higher biomass yield, demonstrating the potential to utilize native species for nutrient polishing and algal biomass production.

Expenditure on the operation of municipal wastewater treatment plants for nutrient removal

2000 ◽  
Vol 41 (9) ◽  
pp. 281-289 ◽  
Author(s):  
O. Nowak
Keyword(s):  
Nutrient Removal ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
General Scheme ◽  
Operating Costs ◽  
Municipal Wastewater Treatment ◽  
Wastewater Purification ◽  
Labour Costs ◽  
Municipal Wastewater Treatment Plants ◽  
P Removal

Operating costs of Austrian municipal treatment plants are evaluated for 1989/90 and for 1997, respectively. The results indicate that presently the expenses which can be directly connected to wastewater purification, i.e. energy and chemicals for P removal, comprise only about 20% of the total operating costs. Today, in Austria like in other EU countries, the predominating factor is “labour costs”, even at nutrient removal plants. A general scheme for estimating operating costs is presented that can be applied to WWTPs in other parts of the world. In this scheme the important factors relevant to the operating costs are integrated.

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