Due to the irrigation water shortage, an integrated trial was carried out on waste waters sampled from El-Khadrawia agricultural drainage water, Sewage Station of Quesna, the discharged water from the Egyptian food Factory in Quesna and the industrial waste water discharged from the Textile Factory in Quesna. The treatments involved four coagulants i.e. ferric chloride (FC), poly aluminum chloride (PAC) , aluminum sulfate (A S) and cement kiln dust (CKD). Preliminary experiments were conducted using these coagulants at rates of 100,150,200,250 and 300 mgL-1 for contact times of 1,24 and 48h. Results of these experiments showed that the maximum effects on improving the studied waste water properties occurred due to a coagulant concentration of 300 mgL-1 and a contact time between the water and the coagulant of 48h. Hence the treated waters obtained due to the afore mentioned experiment, conducted at 300 mgcoagulant per liter and a contact time of 48 h were further treated with rice straw at contact times of 1, 24 and 48h. The integrated treatments maximized the effect of the used coagulants on improving the studied waste water properties with special concern of their contents of heavy metal ions.The poly aluminum chloride (PAC) integrated with rice straw seemed to be of the best effect on qualities of the investigated waste waters. |
