Which rate favorable with time? Which amount of wastewater can be treated with using this system?
Dear Mohamed S. Gaballah: Continuous flow in constructed wetlands could be easily manage using suitable pump.
Concerning flow rate and amount of wastewater treated per unit time: It depends at first on wastewater quality and wetlands performace (HRT needed to attain required quality of effluent).
Best regards
Vit
Dear Mohamed S. Gaballah,
you can control continuous folw by different types pump ,and adjust the size of fiow according to the HRT and HLD you have designed.
Best regards
XU
Dear Mohamed S. Gaballah,
following to the previous comments, a question directly rises, what you mean by continuous flow? I think controlling the flow depends mainly on the type of the constructed wetland, for instance, the horizontal flow wetlands can receive the flow from the stored wastewater in septic tanks or Imhoff tanks either based on gravitational forces or pumps. the vertical flow receives controllable and intermittent flow.
The flow rate or hydraulic loading rate depends mainly on the characterization of the influent wastewater (BOD, nutrients), i.e. organic loading rates and the design of the wetland, as well as the purpose of treatment, i..e either BOD removal or nitrogen removal. in addition, the hydraulic retention time can be designed to be from 2-5 days. I think the the amount of the wastewater that can be treated in constructed wetlands mainly depends on the (hydraulic loading rates) besides the organic loading rates and the purpose of treatment e.g. treatment for reuse in irrigation, sludge dewatering, or recharging in groundwater aquifer.
regards
Dear Mohamed,
Continuous sub-surface flow could be maintained in Horizontal Flow Constructed Wetland Technology for secondary or tertiary Wastewater Treatment after Septic or Imhoff tank using course sand and gravel up to 32mm and developed rooted local plants, planting in chess board order, providing 5-10m2/person area and calculating the hydraulic and organic loading (BOD) without energy, pumps, chemicals using. The roots of the plants provide oxygen for aerobic bacteria to be used for decomposition of organic matter, shelter for the bacteria and enhance the wastewater percolation without clogging.
Regards,
Dr. Chet
Hello Mohamed,
Continuin the discussion here, the best thing you can do is to find the design of your wetland system.
From there you should ifdentify some key data:
*Design flow
*Wetland Design (efficiency of the wetland considered in the design)
*Hydraulic behaviour of the plant (water residence time)
*Water quality parameters for this plant
--There are different ways to mannage your flow rate, so this should be of no difficulty for you.
--For the eficciency of the plant it will depend on the new water quality parameters and the new flow
If you do not have all this information then my suggestion is to start with half of the flow, stabilize the system for the next 4 months and make increased changes of no more than 10% and stabilize it again, use the multiparameter on total dissolved solids as afast measurement.
Cheers
Adrian
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