Wafer fab effluent: silicon carbide, DEG. Electronic industries: Nickel, Cu. Petroleum industries equipment cleaning effluent: xylene, toluene. Pharmaceutical industries: ethanol, methanol, IPA, acetone, ethyl acetate.
Those chemicals inside the effluent above can be recovered and reused.
Xylene, Toluene, Ethanol, Methanol, IPA, Acetone, Ethyl acetate, etc.
In principle, any materials can be recovered from waste. However, because of technology or chemical concentration in the waste, it is not economically viable to recover some chemicals from waste.
Every wastewater treatment plant has trade effluent discharge and to be licensed at PUB to comply with trade effluent discharge parameters.
No, Pioneer does not have this kind of service.
Generated gas releases from treatment facilities are to go through scrubbers and to release clean air emission to atmosphere. Suspended solids discharged are to be separated as filtered cake and be disposed for landfill after stabilization treatment.
Treated water are only allowed to discharge into public sewer but not allowed to discharge into river and lake in the main land of Singapore.
As long as treated waters are worth to be recycled in terms of costs and well within the parameters for reuse.
If the recovery plant return on investment (ROI) is within 3 years by recycling and cost of utility water saving, it is worth to set up a recovery and treatment system.
DAF system is the improved version of aerobic digestion where waste water with medium range of COD are removed by injection through coagulant and flocculants and followed by micro-aeration bubbling. The advantage of using DAF is effective in WWT operation in terms of less hydraulic retention time and very much less foot print requirement compared to conventional aerobic digestion.
Equipment fabrication 10~12 weeks, installation and commissioning 6 weeks.
After treatment when the water parameters are well within the limits, water is safe to drink.
For RO system, energy of 6kWh per cubic meter of potable water is required.
The equipment which is used for separation of solid and liquid in plate and frame pressed by hydraulic pressure where solid is retained in the frame while liquid passed through the filter fabric cloth.
The equipment which is used for separation of solid and liquid by pressurizing in between upper and lower belt fabric layers and liquid passed through the fabric while squeezing the solid layer.
Estimated 180lit per person per day.
Estimated 120lit per person per day.
If the drinking water has some contaminations, then to add chemical to remove it.
Biological Treatment plants will be affected by temperature. In cold country use thermal energy in anaerobic digester to maintain certain temperature.
Estimated 50lit per person for 7 days minimum storage is required in case of breakdown.
One week after the existing project works are tasked to subcontractors and get back for emergency services required customer.
If potable water, it is safe for irrigation or gardening.
100~300m3 per day WWT required estimated space 10m x 10m.
In order to meet Air emission limit by NEA- Singapore required < 5ppm of VOC, any amount of VOC from the process is required to remove till meet the air emission discharge VOC limit.