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As a creative and agile Iranian holding in the bitumen industry, DEJPA is among the first three producers in Iran with an export market, focusing on the field of bitumen and mulch. It is also known as a leading company in the field of technical and engineering services in the oil refining, bitumen and mulch industry, and it has made successful entries in the field of oil refining as business opportunities for the coming years.
Taking the lead in gaining market share in the current chain through increasing productivity, intelligence and innovation in supply, production and sales methods, as well as entering the oil refining chain in order to learn and build strategic capacity for the future of business.
40 YEARS OF COUNTINUES ACTIVITY IN BITUMEN PRODUCTION.
 
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Dejpa Bitumen

Short-term effect of oil-mulch on vegetation dynamic; Integration of ecological and remote sensing-based approaches

Wind erosion is one of the desertification results and is among the natural processes that mostly occur under dry conditions and high wind velocity. Using oil-mulches is one of the common methods to stabilize sand dunes. The current study aimed to investigate the short-term effects of oil-mulch on vegetation attributes (i.e., cover and diversity) and rangeland condition score (RCS) using integrated ecological and remote sensing-based approaches in arid regions of Southwestern Iran. A vegetation survey was carried out in 2019 in the oil-mulched and control area, and a remotely sensed vegetation index (MSAVI) was calculated for 2017 and 2019. The results indicate that one year after treatment, compared to the control area, vegetation cover (30 ± 17.11 vs. 17 ± 5.44 %) and litter (4.6 ± 2.18 vs. 0.94 ± 1.55 %) increased significantly in the oil-mulched area, while bare soil (65.20 ± 17.34 vs. 82.31 ± 5.84 %) decreased. Further, diversity indices (Species evenness, Shannon, and Simpson indices) declined by applying oil-mulch (88%, 63%, and 71%, respectively). The rangeland condition score was significantly higher in the oil-mulched area than in the control area (22 ± 1.86 vs. 12 ± 0.88; P < 0.001). Comparing MSAVI between 2017 and 2019 showed that vegetation cover increased 44.8%. Based on the results, it can be suggested that planting native palatable species in an oil-mulched area with the exclusion of livestock grazing is likely to increase the benefits of oil-mulch treatment and will lead to better rangeland condition score.
Dejpa Bitumen

Stabilization of Baiji Sand Dunes by Petroleum Residues

This study reports on a field project conducted in Baiji, Iraq, where petroleum residues were used to stabilize shifting sand dunes. Various concentrations of oil residues were sprayed on dunes, and their stabilizing effectiveness was monitored over time. The results revealed that petroleum residues offer a cost-effective alternative to conventional mulches, demonstrating strong performance in reducing sand mobility. The research highlights the importance of proper application techniques and optimal concentration levels to maximize effectiveness. The study underlines the industrial and environmental potential of utilizing petroleum residues in desert management projects.
Dejpa Bitumen

Use of modified and petroleum-impregnated bentonite mulch as an eco-friendly stabilizer of wind erodible sands

This study investigates the use of modified bentonite impregnated with petroleum as an eco-friendly mulch to stabilize wind-erodible sands. The modified clay demonstrated the ability to adsorb petroleum up to five times its own weight and resisted wind erosion at speeds up to 16.7 m/s without soil loss. In contrast, untreated sands began eroding at 10.3 m/s. Additionally, the mulch significantly reduced the leaching of polycyclic aromatic hydrocarbons (PAHs) into drainage water. The findings suggest that petroleum-impregnated modified bentonite mulch offers a sustainable and efficient method for controlling wind erosion in arid regions.