Controlling of Environmental Impacts of the sand mining mills effluent with treatment by Chemically Enhanced Primary Treatment (CEPT) in Talar River, Iran

In Iran, Sand mining mills are obliged to comply their effluent qualities with the environmental standards by environmental regulations. In this Paper, Treatment of sand mining mill effluent In Talar River, Iran, is investigated with the help of Chemically Enhanced Primary Treatment (CEPT) on laboratory scale (Jar test method), using coagulants such as Alum, Chloroferric, Feso4, Cao and Polyelectrolyte in various conditions. After taking sample from sand mining mill effluent (sample A) and river (downstream of mill, sample B), characteristics of each sample are measured. Results show that TSS of A and B are 55355 mg/l and 3556 mg/l respectively and turbidity of A and B are 30255 FTU and 0655 FTU respectively. Then Jar test is applied to samples and results show that Chloroferric usage as Coagulant and Polyelectrolyte as coagulant aid is the best option for A. For sample A, with the pH of 6.5, 35 mg/l Chloroferric and 5.55 mg/l Polyelectrolyte, removal percentage of TSS and Turbidity are 55.579 and 55.549 respectively. For sample B, with the pH of 6.5 and 45 mg/l Chloroferric, removal percentage of TSS and turbidity are 55.579 and 50.609 respectively.

Keywords:

Sand mining , Wastewater , CEPT , Jar Test , TSS , Turbidity