Case Study: Wastewater Discharge Facility
Discharge Facility Case Study
HW is a governmental agency handling the waste water treatment of the state. The Administration & Main Sewage Treatment Plant is situated about 15-20 minutes from the airport and is within the Industrial Area.
They are currently operating a waste water treatment plant with an average capacity of 55,000 m3/day. The flow ranges from 53,000 to 57,000 m3/day on peak and off-peak time. There is a current demand to expand the plant’s hydraulic capacity to 100,000 m3/day due to pressure of new domestic households wishing to connect to its pipe network. There’s also an existing conventional plant still in operation to accommodate peak loads, however, this is not their preferable solution.
Waste water is collected in two (2) ways: by tanker and by pipe network. By volume, Tankers correspond to a higher percentage of discharge waste water dumping almost 40,000 m3 daily. The other volume, approximately, 20,000 m3 comes from the main domestic pipe network.
Given the volume of tankers, the variability of waste water quality and volume has been a factor in their STP’s operation thus, pushing them to look for alternative solution to quantify and control this tanker discharges. On the other hand, the domestic sewer system is having infiltration of salty water due to its strategic location near the gulf sea. The latter escalates the TDS of the treated water, which has to be controlled. There are two (2) standards they are currently following based on local Ministry of Environment: Class A and Class B. Class “A” requires a definitive water quality of TSS, BOD at 5 ppm. While Class “B” effluent are considered to have TSS, BOD of 10 ppm.
In general, the plant is having its own 3mm screening facility, compact grit settling and oil skimmer, screening washer and compactor they collectively called HEAD works. The main biological treatment consists of an anoxic and aerobic treatment, followed by an MBR system.
The main problem they are
HW is a governmental agency handling the waste water treatment of the state. The Administration & Main Sewage Treatment Plant is situated about 15-20 minutes from the airport and is within the Industrial Area.
They are currently operating a waste water treatment plant with an average capacity of 55,000 m3/day. The flow ranges from 53,000 to 57,000 m3/day on peak and off-peak time. There is a current demand to expand the plant’s hydraulic capacity to 100,000 m3/day due to pressure of new domestic households wishing to connect to its pipe network. There’s also an existing conventional plant still in operation to accommodate peak loads, however, this is not their preferable solution.
Waste water is collected in two (2) ways: by tanker and by pipe network. By volume, Tankers correspond to a higher percentage of discharge waste water dumping almost 40,000 m3 daily. The other volume, approximately, 20,000 m3 comes from the main domestic pipe network.
Given the volume of tankers, the variability of waste water quality and volume has been a factor in their STP’s operation thus, pushing them to look for alternative solution to quantify and control this tanker discharges. On the other hand, the domestic sewer system is having infiltration of salty water due to its strategic location near the gulf sea. The latter escalates the TDS of the treated water, which has to be controlled. There are two (2) standards they are currently following based on local Ministry of Environment: Class A and Class B. Class “A” requires a definitive water quality of TSS, BOD at 5 ppm. While Class “B” effluent are considered to have TSS, BOD of 10 ppm.
In general, the plant is having its own 3mm screening facility, compact grit settling and oil skimmer, screening washer and compactor they collectively called HEAD works. The main biological treatment consists of an anoxic and aerobic treatment, followed by an MBR system.
The main problem they are