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Until 1925, raw sewage from Los Angeles was discharged untreated directly into Santa Monica Bay in the region of the Hyperion Treatment Plant. [ 3 ] With the population increase, the amount of sewage became a major problem to the beaches, so in 1925 the city built a simple screening plant in the 200 acres (0.81 km 2 ) it had acquired in 1892.
Sewage sludge is the residual, semi-solid material that is produced as a by-product during sewage treatment of industrial or municipal wastewater. The term "septage" also refers to sludge from simple wastewater treatment but is connected to simple on-site sanitation systems, such as septic tanks.
The treated water is discharged to the lake in the adjacent Balboa Park and then flows into the Los Angeles River, where it comprises the majority of the flow. The plant began operation in 1985 and processes 80 million US gallons (300,000 m 3 ) of waste a day, producing 26 million US gallons (98,000 m 3 ) of recycled water.
Sludge treatment technologies that are used for thickening or dewatering of sludge have two products: the thickened or dewatered sludge, and a liquid fraction which is called sludge treatment liquids, sludge dewatering streams, liquors, centrate (if it stems from a centrifuge), filtrate (if it stems from a belt filter press) or similar.
Industrial facilities may generate the following industrial wastewater flows: [citation needed] Manufacturing process wastestreams, which can include conventional pollutants (i.e. controllable with secondary treatment systems), toxic pollutants (e.g. solvents, heavy metals), and other harmful compounds such as nutrients
Chematur's Super Critical Fluids technology was acquired by SCFI Group (Cork, Ireland) who are actively commercializing the Aqua Critox SCWO process for treatment of sludge, e.g. de-inking sludge and sewage sludge. Many long duration trials on these applications have been made and thanks to the high destruction efficiency of 99.9%+ the solid ...