Studying the Effect of Dairy Wastewater on the Properties of Gypsum Soil and the Variation in the Wastewater Characteristi


Industrial wastewaters are the serious problems which nowadays effect the environment,the process of treat them as well as the disposal of their negative impacts are numerous and different. The access of these industrial residuals to the soil by any way will attain the soilsafety and their properties changing and consequently the safety of structures constructedor will be constructed on such soil is the major subject of researchers .This study dealt withthe influence of disposed industry wastewater on chemical and engineering properties ofthe soil by soaking soils specimens with samples of this water, also this study includes theeffect of gypseous soil as an infiltration medium on the chemical properties of dairywastewater, which infiltrated through a column of gypseous soil .It was transportedgypseous soil samples from Tikrit region with gypsum content at (31.68%) , where thisresearch contain two stages, the first one contains soaking these gypseous soil samples inbasin of dairy wastewater for (15, 30 & 60) days. At the end of each period, the soil samplestaken for conducted the engineering and chemical tests.The second stage is summarized byleaching the dairy wastewater through soil column, tests were conducted (specific gravity,Atterberg limits, compaction, shear strength parameters, consolidation, collapse, gypsumcontent, total soluble salts, organic maters and pH) also it was conducted for leaching dairywastewater .The results showed the soil exposed to soaking were changes in soil andinfiltrated wastewater properties, In regards to the impact of soil on the infiltratedwastewater characteristics it was showed where leaching periods increased, the pH valuefor dairy wastewater reduced also the COD, phosphate PO4 and nitrates NO3 , while thevalues of chlorides CL and sulphates SO4 were increased .