Investigation the Optimum Combined Dosages of Date Seeds Powder as Natural Coagulant with Chemical Coagulants in Domestic Wastewater Pretreatment. jcoeng [Internet]. 2016 Jun. 1 [cited 2024 May 7];22(6):76-8. Available from: https://joe.uobaghdad.edu.iq/index.php/main/article/view/205