The nutrients which must be necessarily in terms of the development of plants are carbon, nitrogen and phosphorus. Carbon and nitrogen are obtained by atmospheric systems. However, phosphorus is the limiting element in lakes. If an increase of phosphorus input into a surface water increases the algae life in the water. Phosphorus, which is effective in the growth of algae, is mainly caused by fertilization activities in agricultural areas (80 percent). It is due to small amounts of detergents, animal wastes and other uses.

Phosphorus in the water ecosystem is the key to the chemical and biochemical balance. Phosphorus in water is generally present in various phosphorus compounds. Phosphorus causes many reactions both in natural water environment and wastewater environment. The concentration of phosphorus in lakes in mountainous areas is very low. In lakes rich in swamps and humus, phosphorus concentration is high. The concentration of phosphorus in polluted lakes is 1 μP / l.

Environmental engineers generally focus on the amounts of organic phosphorus and inorganic phosphorus that make up the total phosphorus present in water. The total amount of inorganic phosphorus is composed of orthophosphate and polyphosphate. There are various methods of determining the amount of phosphorus or phosphate.

Before the introduction of synthetic detergents in households, the concentration of inorganic phosphorus in domestic wastewaters was generally between 2 and 3 mg / l, and organic phosphorus concentration was between 0,5 and 1 mg / l. Inorganic phosphorus of human origin in wastewater is largely composed of the degradation of proteins in human waste. The average amount of phosphorus excreted by humans is 1,5 g / day per person.

The synthetic detetrajanar lime contains too many polyphosphates as binders. Their structures contain phosphorous at an average level of 12 or polyphosphate above 50 per cent. This increased the amount of phosphorus in domestic wastes. In this way, phosphorus concentrations in wastewaters increased up to three times.

Phosphorus determination studies are carried out by spectrophotometric method in authorized laboratories within the scope of chemical tests. The spectrophotometric method is based on the measurement of the absorbed or emitted electromagnetic radiation waves of atoms, molecules or ions as they pass from one energy level to another.