## 3 Results and Discussion
### Aromatic Compounds of Capia Pepper
Furthermore, an increase in the amount of this component was observed in samples irrigated with wastewater in both varieties (Table 7, Figure 3). Hexyl-hexanoate, a compound belonging to the ester class, is known for its fruity and sweet aroma. This volatile compound is commonly found in various fruits, contributing to their characteristic scents. Hexyl-hexanoate is often described as having a pleasant, ripe, fruity fragrance with notes reminiscent of apples, pears, and other tropical fruits. The hexyl group in its structure contributes to the compound's fruity character [63; 64]. The Yalova variety exhibited a higher level of hexyl-hexanoate than the Amfora variety. Furthermore, an increase in the amount of this component was observed in samples irrigated with wastewater in both varieties (Table 7, Figure 4). N-docosane is typically odorless due to its linear and unbranched structure and its saturated nature. This compound is commonly used as a reference or standard in analytical chemistry and can be found in various natural sources, such as certain plant waves. Although n-docosane itself does not contribute to the aroma of substances, it is valuable for scientific purposes as it serves as a baseline for comparison in studies of other volatile compounds. In aroma analysis or fragrance formulation, n-docosane is more commonly used as an inert substance than for its olfactory characteristics [60; 67]. The content of n-docosane was higher in the Yalova variety than the Amfora variety; however, no significant difference was detected among the treatments (Table 7, Figure 5). Figure 3: The amount para-dichlorobenzene and alpha-cubebene in capia peppers irrigated with different wastewaters. MW, Municipal water; WW1, Physical treatments; WW2, Physical + biological treatment. Limonene is a cyclic monoterpene hydrocarbon present in the peels of citrus fruits, including lemons, oranges, and limes [65]. This colorless liquid has a strong citrus scent, which is refreshing and zesty. Limonene is known for its potential health benefits, including antioxidant and anti-inflammatory effects. Its aromatic properties are also noteworthy [68]. The Amfora variety exhibited a higher Limonene level than the Yalova variety. Furthermore, an increase in the amount of this component was observed in samples irrigated with wastewater in both varieties (Table 7, Figure 5). Isoamyl butyrate is an ester compound that contributes to the aroma of certain fruits, particularly in small quantities. This compound is colorless and has a fruity, banana-like odor. It is commonly used in the food and beverage industry to impart a sweet and fruity character to products such as candies, chewing gum, and artificial banana flavorings [69; 70]. The Yalova variety exhibited a higher level of isoamyl butyrate than the Amfora variety. Figure 4: The amount of hexyl-hexanoate and alpha-farnesene in capia peppers irrigated with different wastewater. MW, Municipal water; WW1, Physical treatments; WW2, Physical + biological treatment. Alpha-farnesene is a sesquiterpene compound commonly found in various plants, particularly in the essential oils of fruits and flowers. This natural organic compound contributes a distinct, sweet, and fruity aroma to the substances in which it is present. The alpha form of alpha-farnesene imparts a pleasant and slightly floral fragrance, often reminiscent of apples and other orchard fruits [65; 66]. The Amfora variety exhibited a higher alpha-farnesene level than the Yalova variety. Furthermore, an increase in the amount of this component was observed in samples irrigated with wastewater in both varieties (Table 7, Figure 4). Figure 5: The amount of n-docosane and Limonene capia peppers irrigated with different wastewater. MW, Municipal water; WW1, Physical treatments; WW2, Physical + biological treatment. Furthermore, an increase in the amount of this component was observed in samples irrigated with wastewater in both varieties (Table 7, Figure 6). N-hexadecane is a straight-chain alkane with a 16-carbon backbone.