Therefore, the wastewater treatment plant is one of the community's efforts to protect the environment from the dangers of waste. The fact is that until now, there are quite a lot of industries that use WWTP technology (Wastewater Treatment Plant) in Indonesia. But scientifically, the environment actually has a large enough carrying capacity against disturbances that arise due to the pollution of the waste water. However, the nature has limited capacity in its carrying capacity so that wastewater needs to be treated before being disposed of.
Some simple ways in wastewater treatment, including:
1. Dilution
The wastewater is diluted to a sufficiently low concentration and then discharged into water bodies. However, with the increasing population, which means increasing human activities, the amount of wastewater that must be disposed of is too much and too much dilution water is needed, so this method cannot be maintained anymore.
However, this method can also cause several other losses, including the danger of contamination of water bodies that are still likely to still exist and the occurrence of sedimentation which eventually causes siltation of water bodies, such as ditches, rivers, lakes, and so on.
2. Oxidation Ponds
In principle, this type of wastewater treatment is by utilizing sunlight, algae (algae), bacteria and oxygen in a natural cleaning process. Wastewater is channeled into a large rectangular pond with a depth of between 1-2 meters. The walls and bottom of the pool do not need to be given any coating. The location of the pond must be far from residential areas and in an open area so as to allow good wind circulation.
How it works include the following:
• The 4 elements that play a role in this natural cleansing process are sunlight, algae, bacteria, and oxygen. Algae with their chlorophyll grains in wastewater carry out the process of photosynthesis with the help of sunlight so that they thrive
• In the synthesis process for the formation of carbohydrates from H2O and CO2 by chlorophyll under the influence of sunlight O2 (oxygen) is formed.
• As a result, the BOD value of the wastewater will be reduced so it is relatively safe to be discharged into water bodies (rivers, lakes, and so on).