Enzyme Activity in Compost Consisting of Sludge and Tea Waste

Enzyme activities in compost containing various proportions of sludge and tea waste were compared.The results showed that the higher compost temperature was reached on the third day,and maintained for 16-18 days for all treatments.The total N in the compost containing 40%-50% of sludge was higher than when 30% sludge was used.The total N of Treatment D was 19.17 gg-1,which was the highest among all treatments.The order of total N content for the treatments was DECBA.The available N of Treatment E was 1171 mgg-1,which was the highest among all treatments.The order of average available N for the treatments was EDCBA.The cellulase activity increased linearly as the temperature rose.On the 8th day,the cellulase activities of the Treatment A,B,C and E reached maximum values of 0.396,0.498,0.499 and 0.498 mg-1-1,respectively.Treatment E attained the highest value of 0.590 mg-1-1 on 12th day.The urease activity decreased with increasing tea waste addition.The order of the average urease activity in the treatments was CADEB.