EFFECT OF ABATTOIR WASTE DISPOSAL ON SOIL PHYSICO-CHEMICAL, BIOLOGICAL PROPERTIES AND ENZYME ACTIVITIESS. RADHA, V.J. NITHYA, R. HIMAKIRAN BABU, A. SRIDEVI, G. NARASIMHA AND N.B.L. PRASADAbstract The effect of abattoir (slaughterhouse) waste on soil physico-chemical, biological properties and enzyme activities were investigated in the present study. The abattoir waste consists of bones, horns and faecal components, slurry of suspended solids, fat, blood, paunch content and soluble materials. Direct disposal of abattoir waste onto the soil alters the physico-chemical, biological and enzymatic properties of the soil. Results of physical analysis shown contaminated soil with abattoir waste had grey color with bad smell and had high electrical conductivity and water holding capacity. The pH of disposed soil with waste was less than that of control soil. Improved chemical properties of the test soil were observed because of the presence of organic carbon content, potassium and phosphate contents. High count of bacterial and fungal populations was found in test soil. Soil enzyme activities were measured with addition of substrates, casein for protease and starch for amylase, to soils and formation of hydrolytic products tyrosine and maltose from substrate were estimated in the soil at periodic intervals. With increased incubation period the two enzymes activities enhanced up to 14th day interval and after wards both were declined up to 21st day incubation in the both contaminated and control soil.
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