Conclusions
This study suggests additional ways to enhance the efficiency of wastewater treatment processes by aquatic plants.
The results indicate that aquatic plant cultures, with aeration or circulation, produced better kinetic features for sewage treatment as compared to the control and with plants, but without aeration and circulation.
This difference becomes more pronounced when the range of high levels of the water quality indicators is encountered.
The role of aeration and/or circulation, in enhancing the removal kinetics, was demonstrated.
This is one of the most significant results of this work, as no related data are available elsewhere.
Aeration rate was found to be more effective in the lower 0.2–0.4 L min−1range.
Our results confirm the capacity and effectiveness of aquatic plants,Eichhornia crassipesand Pistia stratiotes, when supplemented with circulation or aeration, to lower BOD, COD, turbidity, phosphorus and ammonium levels at shorter periods of time. Prolonged expo-sure of the water to treatment with circulation or aeration may
prove to be deleterious, with due rise in BOD and COD.
The optimal effect of wastewater aeration and circulation, on the water treatment efficiency, will be the subject of further tests in our laboratory with different aquatic plants.
In the presence of aquatic plants, circulation or aeration, the second order reaction model was found to provide a superior description of the process kinetics, e.g. compared to first modified order model.
This applies to the kinetics of BOD, COD and turbidity change vs. time in the case of Eichhornia crassipesand Salvinia natans that grow in a batch system with circulation and/or aeration.
These results were verified exclusively in the tested systems that operate on laboratory scale.
Extension to larger systems requires further research.
Subsequently fed a liquid diet And the interface protocols.
When you have enough volume to move tissue culture medium formulations.
2 proto cores that grow and develop into leaves and then move down the recipe, move the seedlings sprout and root orchids are complete.
Grow and move out