Daowd Al-Sayed ^(1)*

(1). General Commission for Scientific agriculture Research, Damascus, Syria.

(*Corresponding author: Daowd Alsayed. E-mail: daowd.alsed@gmail.com).

Received:  8/04/2022                   Accepted: 23/06/2022

Abstract: 

The addition of olive mill wastewater in large quantities causes damage to soil due to its high content of phenolic compounds, this research aims to reduce the amount of these compounds by biological treatment and test them on the Triticale plant. The olive wastewater was treated by adding biological additions before adding it to soil. A study was carried out for planting pots in the season 2020, and it was designed in a Randomized simple Complete Block by 7 treatments: control (T) (without adding wastewater), raw wastewater (OW), wastewater treated biologically by Penicillium sp (OWFP) and Aspergillus flavos (OWFA), wastewater treated by Bactria Pseudomonas sp (OWBP) and Bacillus sp (OWBB), wastewater treated by the both genus of fungi and bacteria (OW2F2B), in three replicates. The results showed that there were significant differences between all the biologically treated treatments compared to the control (T) in terms of the studied indicators. Apparently, all the biologically treated treatments were superior to the total nitrogen content in the soil, where the treatment (OWBB) reached (0.11)% over the control treatment (T), which amounted to (0.0867) without any differences between the treated treatments. (MWBP) treatment was significantly superior with (53.27 mg/kg) and the (OWFP) (OW2F2B) (OWFA) were reach (42.80), (43.84) and (47.17). For available potassium, the treatment (OWBP) was significantly superior to all treatments, reaching (730.3) mg/kg.

Key words: Olive-mill waste water, biological treatment, fungi, bacteria, mineral content N, P, K, microorganisms in soil.

Full paper in Arabic:  pdf