The Jaro Public Market, like most city markets in the Philippines, is complete with dry goods stalls such as those selling kitchen wares, secondhand goods (Ukay-Ukay stalls), fish and meat stalls, vegetable vendors and canteens. The Jaro market also has a coconut grinding and live animal section. In an effort to meet the requirements of the Clean Water Act and improve environmental and health conditions in the Jaro area, Iloilo City engineering and planning departments are developing a wastewater treatment system.
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This project will utilize an ABR with approximately 2.4 days of retention time to remove approximately 70% of the biochemical oxygen demands and total suspended solids in the wastewater stream. The specific design of the ABR tank has yet to be finalized. Engineers are considering using both a 5 and 7 chamber ABR design. They are currently consulting with their design team and subcontractors to determine the best ABR configuration for the project. Note that the final chamber of the ABR will include an upflow gravel filter, which will not only help remove suspended solids but will also help with biological treatment. The ABR, along with the upflow filter, will treat the effluent to a point that it may be discharged into the secondary treatment system, which in this case is a subsurface flow constructed wetlands.
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Finally, an operations and maintenance plan will be developed and associated costs calculated. Operations expenses are anticipated to be quite low as this is a passive wastewater system with no electrical requirements. Data on the operations and maintenance costs will be considered for the cost recovery plan.
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