Site: Barr Na Claise, Church Hill, Innishannon, Cork.
Client: Ernst & Young (Site in Receivership)
Development type: Housing development with 48 houses potentially, 25 houses currently built. This is phase 1 allowing 5 people per dwelling, phase 2 will commence when all existing dwellings are sold and occupied. Phase 2 will be a second stream of the original plant with flow split by pumping system with equal flow.
Point of discharge: Cork County Council Storm Sewer
Suspended Solids: 35mg/l
Total Phosphorous: 1mg/l
Total Ammonium: 1mg/l
Wastewater Treatment Plant:
The site is on a hill and the sewage flows downhill to the lowest point to a pump station with 40m3 storage based on phase 2 output. The output is flow balanced over 24hrs and pumps for 1 minute out of every 15.
Conder SAF 125N5 based on current occupancy allowing 5 people per house.
Expected effluent results:
Suspended Solids: <30mg/l
Total Phosphorous: <8mg/l
Total Ammonium: <5mg/l
The effluent is being pumped to 3 banks of 4 x Ecoflo 4EH Tertiary Filters which will treat up to 10p/e Hydraulic load each. The banks are dosed with the use of an indexing valve which doses a different bank every time the pump cuts in and in a cycle. The float length on the pump ensures the same volume of output every time the system pumps out.
The Tertiary filters will reduce the BOD & Suspended Solids by 70%, the Total Nitrogen & Ammonia 85% & Pathogens by 99.9% (log 4 Kill)
Phosphorous reduction is by means of a dosing pump with flow based control.
Outfall from the filters is by gravity outlet at the bottom and flow to a sample chamber.
The filters are available from 4EH to 45EH and are Ideal in combination for any commercial developments and offer better treatment than any other product on the market. The end of life costs are very low as the material only needs changing every 15-20yrs. The waste material can be composted as its an organic. They are factory built in a controlled environment which maintains the highest of standards.