Evaluation of influence of coagulation/flocculation and Fenton oxidation with iron on landfill leachate treatment

Landfill leachates (LFL) collected from Sfax (Tunisia) discharge area are characterized by high chemical oxygen demand (COD), ammonium and salts contents. They constitute a source of phytotoxicity and pollution for ground water and surface water resources which requires an adequate treatment process. To evaluate the efficiency of the coagulation/flocculation treatment, special attention was paid to the effect of pH, coagulant and flocculant doses. Then, effect of zero valent iron was also studied alone and in combination with coagulation/flocculation pretreatment. Our results indicate high removal efficiencies by coagulation/flocculation (46% COD and 63% turbidity) and Fenton process (48% COD and 76% turbidity). The combined application of coagulation/flocculation and Fenton revealed higher COD removal (62%) and turbidity reduction (90%). These results showed the applicability of this combined treatment method for the degradation of organic compounds and reduction of the treated leachate toxicity

Effects of Olive Mill Wastewater on Soil Nutrients Availability

Abstract Olive mill wastewater (OMW) is one of complex wastewater generated by the olive oil extraction process. It is characterized by high values of COD, BOD and phytotoxic levels of polyphenols, but also by a high amount of organic compounds and plant mineral nutrients. Therefore, OMW field spreading may represent a low cost contribution to soil amendment. Olive mill wastewater (OMW) spraying effects onto soil physico-chemicals characteristics were investigated. Three OMW doses 50, 100 and 200 m 3 ha -1 year -1 were applied for ten successive years on sandy soil. The findings showed that the pH of the soil, electrical conductivity and organic matter, total nitrogen, phosphorus, sodium, and potassium soil contents increased with increased OMW supply. While, no variations were recorded in calcium and magnesium on soil contents

La péritonite chyleuse en dialyse péritonéale

Chylous peritonitis (CP) is a rare complication in patients on peritoneal dialysis. There are many reasons for this. It can occur as a result of a traumatic insertion of the peritoneal dialysis catheter or secondary to infectious or drug causes. The evolution is favorable at the elimination of the causative agent. We report 3 cases of PC occurring in 3 patients on peritoneal dialysis. In 2 patients, CP was secondary to calcium channel blockers and in 1 case associated with lymph node tuberculosis. The cessation of the causative agent allowed a clarification of the effluent dialysate. CP is a mild form of non-infectious peritonitis that is often confused with infectious peritonitis. In this article we discuss the etiologies of CPs, the pathophysiology and the conduct to be held in front of a CP.La péritonite chyleuse (PC) est une complication rare chez les patients en dialyse péritonéale. Les causes sont multiples. Elle peut survenir suite à une insertion traumatique du cathéter de dialyse péritonéale ou secondaire à des causes infectieuses ou médicamenteuses. L’évolution est favorable à l’élimination de l’agent causal. Nous rapportons 3 cas de PC survenant chez 3 patients en dialyse péritonéale. Chez 2 patients, la PC était secondaire à la prise d’inhibiteurs calciques et dans 1 cas associé à une tuberculose ganglionnaire. L’arrêt de l’agent causal a permis un éclaircissement du dialysat effluent. La PC est une forme bénigne de péritonite non infectieuse qui prête souvent à confusion avec les péritonites infectieuses. Dans cet article nous discutons les étiologies des PC, la physiopathologie et la conduite à tenir devant une PC