Definition of acupressure : the application of pressure (as with the thumbs or fingertips) to the same discrete points on the body stimulated in acupuncture that is used for its therapeutic effects (such as the relief of tension or pain) â compare shiatsu
The SVI is the volume, in milliliters, occupied by 1 gram of settled activated sludge, and it is a measure of the settling characteristics of the sludge.
Of all the process control formulas discussed in so far, the SVI is the easiest and quickest for operators to perform. And it only requires a one liter graduated beaker or settleometer. Some wastewater plants use a 1000 mL graduated cylinder, the use of which is discouraged.