A STUDY OF BIOLOGICALLY TREATED WASTEWATER IN IRRIGATION AND ITS EFFECT ON GROWTH AND (N, P, K) CONTENTS IN MAIZE

The study aimed to use wastewater from Hamdan and Al-Jamaa stations after biological treatment by removing the two elements of lead by (Staphylococcus aureus) and cadmium with Escherichia coli bacteria isolated from this water. Shatt al-Arab water was used as a comparison. Biologically treated and untreated wastewater in addition to the Shatt al-Arab water was used to irrigate the growing Zea mays plant in pots containing (5) kg of soil taken from Qurna district and fertilized with chemical fertilizer (N, P and K) according to the fertilizer recommendation for Zea mays and after 60 days of growth. The results showed that the percentage of removal of cadmium from the liquid culture media pollutant with cadmium was 29.2% by Escherichia coli bacteria and that the percentage of removal of the element of lead from the culture liquid media pollutant with lead was 67.6% by bacteria Staphylococcus aureus. The highest dry weight of the maize crop was 21.64 g pot-1 using the ALـjamaa wastewater treated with E. coli bacteria, and the highest nitrogen and phosphorous percentage in the maize plant was 4.38 and 0.4164% due to the effect of irrigation with the Hamdan sewage plant treated with Staphylococcus aureus, respectively, and potassium. By 4.183%, the effect of irrigation with water from Hamdan plant treated with E. coli bacteria.