3. Physical processes (physical process)
physical processes (physical process) is a simple water treatment, which is insoluble solids out. This will separate the sediment is approximately 50-65% of the separation of impurities in the form of organic matter (BOD5) 20-30% in different ways in the process, there are many ways like a sieve trap (screening) is. separate the debris that was a waste such as wood chips, plastic mesh bags in different sizes. The trap with a sieve, thus separating the first step in the sewage treatment shredding (combination) is the use of cutting debris larger to smaller sweep (skimming) to remove water, oils and fats by the trap. or swept out of the water to make it float (floating) is used with a specific gravity less than water, sediment settling (sedimentation) to separate sludge from wastewater by means of gravity. It applies to sediment that has a specific gravity than water.
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