Certain level of nutrients concentration in the effluent can generally be controlled in several ways, for instance by
utilizing aquatic plants. Aquatic plants are grown in the maturity pond found to be effectively balance the nutrient
ratio in the waste water. If the nutrients are higher than ideal ratio, aquatic plants can be left to grow rapidly. While
on the contrary, aquatic plants should be reduced, if the condition does not meet the nutrient ratio. At this time,
utilization of aquatic plants is mostly done by the palm oil industry before releasing the waste into water bodies such
as rivers, follow the requirements of environmental regulations.