Blacktown Water Treatment Plant
Project Brief
Version: 1.1 Date: 8/22/2014
Copy: Uncontrolled
Document Acceptance and Release Notice
This is Version 1.1 of the Blacktown Water Treatment Plant Project Brief.
Title:
Blacktown Water Treatment Plant.
Background:
This treatment plant is designed to remove potentially harmful substances from waste water. It also includes safe effluent discharge and production of agro-ash. This is the process diagram of the treatment plant:
[pic]
Process flow - step 1 Preliminary treatment bar screen
Removal of large objects As wastewater enters
…show more content…
The filters consist of finely crushed coal, about one meter in depth, and sand, half a meter in depth. This provides the final step in the treatment process.
Process flow - step 6 Chlorination/dechlorination Chlorine is added to the effluent to disinfect any remaining microbiological pathogens; this takes at least half an hour. The effluent is then treated with sulphur dioxide gas to remove excess chlorine, which would be harmful to the river ecosystem. The effluent is then ready for discharge into the river.
Process flow - step 7 Solids separation and incineration The sludge and scum, removed in step 2 of the process, are dealt with separately. The sludge is stored in a sludge holding tank where it is then pumped to the centrifuge at a controlled rate. Polymers are added to the sludge to aid in the thickening of the sludge during this process. Water is separated from the sludge by spinning in a centrifuge to form a thick, muddy substance known as "cake", a process known as "dewatering". The cake is then conveyed to the furnace where it is incinerated at 750-1000°C to produce Agri-Ash. The scum, however, is stored in a heated tank to thicken it prior to its transfer to the furnace, where it is also incinerated. Approximately 700,000 litres of sludge is treated each day to produce 47 tonnes of dewatered solids. After
As the water and the flocs particles progress through the treatment process, the move into sedimentation basin where the water moves slowly causing the heavy flocs particles to settle to the bottom of the sedimentation of the basin this is called sludge and is piped to drying lagoons in direct filtration the sedimentation step is not included and the floc is only removed by filtration system
The cleanup is a three-phase plan, estimated to remove more than 99% of the PAH mass from the area, which has begun and will hopefully undo the previous generations of damage. Phase one is building a box to contain the contamination. Upon completion of the first phase, there will be a double steel-walled barricade surrounding contaminated sediment. Phase two involves of dredging the polluted deposits from the adjacent areas and placing them within the enclosure. The final phase of the project encompasses removing the water from the suppression area and placing a waterproof cap on the facility, which is anticipated to have a 200 year life span, to seal in the chemicals.
tons per year, was permitted to treat a wide variety of pollutants. It was one of only three fixed facilities in
Figure 1 is a layout plan of the processing building and lab/operations building. As the figure shows, there are 23 dirty solvent tanks, 16 clean storage tanks, 3 distillation units, and a molecular sieve. The waste delivered to the site was unloaded into the “dirty” storage tanks. It would be processed in one of the distillation units and through the molecular sieve if necessary. Once processed, the clean
Untreated wastewater is dumped into
A group of subject 48350 Environmental and Sanitation Engineering students visited both plants, and observed the operations and maintenance of these wastewater treatment systems.
After stirring, a vacuum hose is lowered down into the sludge. Once all waste material has been removed, the tank should be rinsed with water to remove any remaining sludge which allows the crew to visually check the system and verify that its condition. If any holes, cracks, missing baffles or other signs of damage are found, immediate repair is recommended to prevent more serious problems from occurring. Otherwise, the waste material is hauled away to an approved disposal facility.
them down drains, or by dumping onto the ground. In addition, vapors emitted by several steps
Special chemicals are now added to the slurry and attach themselves to certain minerals in the mixture. All the slurry is then placed in large tanks. (Flotation cells) Air is then added and then rises through the slurry. The chemicals added to the mixture are hydrophobic so the attach to the passing air and float to the top of the tank and form a froth which contains the gold and pyrite. Soon the tank overflows and the froth is collected into a launder. The froth in the launder is then discharged and out into storage tanks and the water is then extracted from the tanks for reuse, leaving behind the gold in a dissolved form.
A common and safe method for contaminated water clean up is Pump and Treat. Pump and Treat pumps groundwater from the effected wells to an above-ground treatment system. From there, the treatment system removes and contains the contaminate plume. Containing the plume keeps the contaminate from spreading and lowering the future possibility of causing more problems for Fruitvale.
Some universities use industrial digesters to dispose of cadavers used for research and mortuary education. The machine, looks like an enormous pressure cooker, mixes about 70 gallons of water with a small amount of lye. When the five to eight hour cycle is complete: that's three hours to destroy the body, plus a few more to heat and cool the solution then the liquefied remains are safe to pour down the drain. In which perforated basket catches the solids that survive the process, plus implanted medical devices and "bone shadows"—calcium phosphate that makes up about 70 percent of the mass of bones and teeth. The bony bits can be crushed into a fine white
It is an imagine place, who can dream of reusing the wastewater. I never thought about where does the water goes after I flush the toilet or wash the dishes. Now I know that it has been recycled and put back to the ground for our water supply. It is really helpful at the time of the water shortage. The Groundwater Replenishment System (GWRS) is the world's largest water purification system for indirect potable reuse. This system takes highly treated wastewater (that would have previously been discharged into the Pacific Ocean) and purifies it using a three-step advanced treatment process consisting of microfiltration, reverse osmosis and ultraviolet light with hydrogen peroxide. The process produces high-quality water that meets or exceeds all state and federal drinking water standards. The GWRS is a joint project of the Orange County Water District (OCWD) and the Orange County Sanitation District (OCSD), providers enough new water for nearly 850,000 residents and has become an essential element of local water
break down the glue-like material bonding the wood fibers. Chemicals used in the digester are reclaimed and used in
Figure 10 shows the exclusion of biggest waste is done by employees. Reed beds have been emplaced to remove smaller waste particles and gravel beds are there to eliminate the minutest of particles.
The report finds BOD levels meet the National Pollutant Discharge Elimination System (NPDES) permit renewal standards. Results for suspended solids shows an opposite trend. Suspended solids increase throughout the course of the water treatment. This does not meet NPDES standards. Further suspended solids test will be needed to insure a minimal amount of error. If the same trend continues, the facility may need to be redesigned to meet NPDES standards.