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For normal sludge, the value of sludge index for Indian conditions is
For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as
For a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will
In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as
The first stage of neutral process of sludge digestion, is
pH value of an alkaline solution is
The value of machine is TK.6250. Its value decreases by 10% during the first year, 20% during second year and 30% during the third year. What will be the value of the machine after 3 years?
The value of a machine is Tk.6250. Its value decreases by 10% during the first year, 20% during the second year and 30% during the third year. What will be the value of the machine after 3 years?
The main type of sludge gas evolved during sewage treatment in Imhoff tank is
Alkaline phosphatase is raised in