scholarly journals Nutrient removal efficiency using microalgae in different photoperiod cycles, combined with constructed wetland in a wastewater treatment plant

2021 ◽  
Vol 16 (5) ◽  
pp. 1-14
Author(s):  
Jéssica Severo Ferreira ◽  
Ênio Leandro Machado ◽  
Eduardo Alexis Lobo
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Preliminary Treatment ◽  
Light Cycle ◽  
Ammoniacal Nitrogen ◽  
Soluble Phosphorus ◽  
Nutrient Removal Efficiency ◽  
The University

This research evaluates the removal of nutrients by microalgae in different photoperiod cycles, combined with constructed wetland in the wastewater treatment plant of the University of Santa Cruz do Sul, RS, Brazil. The treatment used took place between July and December 2018 and consisted of the following steps: preliminary treatment, secondary treatment with an anaerobic reactor, microalgae tank (MT), sand filter and constructed wetland, using the macrophyte Chrysopogon zizanioides. In the microalgae tank, three light cycles were considered: 12h/12h, 24h and 18h/06h, whose lighting was powered by a white LED lamp of 9 Watts and 6000 Kelvin, regulated by a light controller. The results indicated that there were no significant differences (p>0.05) between the values of soluble phosphorus, ammoniacal nitrogen, COD and BOD for MT comparing the three photoperiod cycles (12h/12h, 24h and 18h/06h). However, the system setup removed 100% of total coliforms, E. coli and TSS in the three light cycles. Regarding the removal of nutrients and organic matter, the light cycle with the best performance was the 24-hour cycle, considering a removal of 67.6% for soluble phosphorus, 94.0% for ammoniacal nitrogen, 63.7% for COD and 42, 7% for BOD, at the end of the treatment process. These results demonstrate that the use of microalgae in combination with constructed wetland has greater efficiency in the removal of nutrients, mainly phosphorus and nitrogen, in addition to reducing physical-chemical parameters and eliminating effluent toxicity.  Keywords: light cycles, microalgae tank, wastewater treatment plant.

scholarly journals Nutrient removal efficiency using microalgae in different photoperiod cycles, combined with constructed wetland in a wastewater treatment plant

2021 ◽  
Vol 16 (5) ◽  
pp. 1-14
Author(s):  
Jéssica Severo Ferreira ◽  
Ênio Leandro Machado ◽  
Eduardo Alexis Lobo
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Preliminary Treatment ◽  
Light Cycle ◽  
Ammoniacal Nitrogen ◽  
Soluble Phosphorus ◽  
Nutrient Removal Efficiency ◽  
The University

This research evaluates the removal of nutrients by microalgae in different photoperiod cycles, combined with constructed wetland in the wastewater treatment plant of the University of Santa Cruz do Sul, RS, Brazil. The treatment used took place between July and December 2018 and consisted of the following steps: preliminary treatment, secondary treatment with an anaerobic reactor, microalgae tank (MT), sand filter and constructed wetland, using the macrophyte Chrysopogon zizanioides. In the microalgae tank, three light cycles were considered: 12h/12h, 24h and 18h/06h, whose lighting was powered by a white LED lamp of 9 Watts and 6000 Kelvin, regulated by a light controller. The results indicated that there were no significant differences (p>0.05) between the values of soluble phosphorus, ammoniacal nitrogen, COD and BOD for MT comparing the three photoperiod cycles (12h/12h, 24h and 18h/06h). However, the system setup removed 100% of total coliforms, E. coli and TSS in the three light cycles. Regarding the removal of nutrients and organic matter, the light cycle with the best performance was the 24-hour cycle, considering a removal of 67.6% for soluble phosphorus, 94.0% for ammoniacal nitrogen, 63.7% for COD and 42, 7% for BOD, at the end of the treatment process. These results demonstrate that the use of microalgae in combination with constructed wetland has greater efficiency in the removal of nutrients, mainly phosphorus and nitrogen, in addition to reducing physical-chemical parameters and eliminating effluent toxicity.  Keywords: light cycles, microalgae tank, wastewater treatment plant.

A laboratory for teaching process control: The wastewater treatment plant

2020 ◽  
pp. 002072091989756
Author(s):  
Inés Tejado ◽  
Emiliano Pérez
Keyword(s):  
Wastewater Treatment ◽  
Process Control ◽  
Wastewater Treatment Plant ◽  
High Performance ◽  
Treatment Plant ◽  
Industrial Process ◽  
Control Engineering ◽  
Embedded Controller ◽  
Industrial Process Control ◽  
The University

Laboratory experiments offer one way to introduce more realism in education and play a key role for the acquisition of practical skills, especially in engineering. This paper addresses the development of an equipment to teach fundamentals of industrial process control engineering mainly for undergraduate courses at the University of Extremadura. The laboratory consists of the DELTALAB–COSIMI wastewater treatment plant SP244, which is controlled by a CompactRIO-9014 high-performance real-time embedded controller, a kind of programmable logic controller of National Instruments. Learning objectives and a summary of students activities carried out in the laboratory lessons are given to illustrate the possibilities of use of this equipment for teaching of industrial process control.

Role of a constructed wetland to humify effluent organic matter from a wastewater treatment plant

2013 ◽  
Vol 52 (31-33) ◽  
pp. 5840-5847 ◽  
Author(s):  
Dongjin Lee ◽  
Jaeweon Cho ◽  
Kangmin Chon ◽  
Byungjin Lim ◽  
Sudip Chakraborty ◽  
...  
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Effluent Organic Matter

Energy saving on wastewater treatment plants through improved online control: case study wastewater treatment plant Antwerp-South

2014 ◽  
Vol 69 (5) ◽  
pp. 1074-1079 ◽  
Author(s):  
Kris De Gussem ◽  
Alessio Fenu ◽  
Tom Wambecq ◽  
Marjoleine Weemaes
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Flow Direction ◽  
Treatment Plant ◽  
Advanced Control ◽  
Nutrient Removal Efficiency ◽  
Computational Fluid Dynamics Cfd

This work provides a case study on how activated sludge modelling and computational fluid dynamics (CFD) can help to optimize the energy consumption of a treatment plant that is already equipped with an advanced control based on online nutrient measurements. Currently, aeration basins on wastewater treatment plant Antwerp-South are operated sequentially while flow direction and point of inflow and outflow vary as a function of time. Activated sludge modelling shows that switching from the existing alternating flow based control to a simultaneous parallel feeding of all aeration tanks saves 1.3% energy. CFD calculations also illustrate that the water velocity is still sufficient if some impellers in the aeration basins are shutdown. The simulations of the Activated Sludge Model No. 2d indicate that the coupling of the aeration control with the impeller control, and automatically switching off some impellers when the aeration is inactive, can save 2.2 to 3.3% of energy without affecting the nutrient removal efficiency. On the other hand, all impellers are needed when the aeration is active to distribute the oxygen.

Sign in / Sign up

Export Citation Format

Share Document