The given diagram illustrates the production of salt from seawater. It is evident that it is a mxied process involving both open steps and a loop. It requires overall 8 steps and the whole process can be diveded into 2 phases: preparation of concentrated salt from seawater, and extraction and packaging of the final product for consumption.
The production starts as seawater is allowed to enter into storage reserviour through a sluice gate. Then, it is kept in the reserviour for 2 days leading to an accumulation of sand and mud at the bottom of the reserviour. The salty water avove4 the reserviour is called brine, which is then passed through a series of 4 shallow ponds in a sequence. During this passage, which require several weeks, brine is kept exposed to sun allowing seawater to evaporate and resutls in concentrated brine, whithin 2 weeks they turns into salt crystal.
In the next phase, salt crystals are harvested and cleaned with water to remove unwanted mud in it. Cleaner brine from this step is then put into a rotatry drier and heated to produce salt. On the other hand, brine mixed with mud from the cleaning stage is passed into stage three for re-evaporation. The final salt produced after drying in the rotary drier is packaged into 2 different types, 25 kg sacks of coasre salt for industrial use, and 500g packet of fine salt for shops.