Please design a rapid sand filter that will effectively remove 65% of the suspended solids in a flow of 10 cubic meters per minute. The suspended material consists of particles that are perfectly spherical with a diameter of 10 microns. Please use sand with an effective size of 1 mm and a porosity of 0.5. You should limit your clean bed head loss to 0.5 meters per meter. (Pease use an attachment efficiency, α of 0.75) Viscosity of water =1.0087x10-3 Ns/m2 Density of water =998.23 kg/m3 What are the dimensions of this filter (Depth and Surface Area)?

2. (a) 2 kg of dry sand is poured into a Eureka can, where it displaces 755 cm³ of water. Calculate the specific gravity of the sand particle. (b) When a 2 kg of the same sand is poured into a measuring cylinder of diameter 6 cm, it occupies a total volume of 1200 cm³. Calculate the void ratio of the sand and its unit weight in this state. (c) The measuring cylinder is carefully filled with water up to the level of the top of the sand, so that the total volume is still 1200 cm³. Calculate the unit weight of the saturated sand in this condition. (d) The side of the measuring cylinder is tapped gently several times, and the level of the sand surface settles to an indicated volume of 1130 cm³. Calculate the void ratio and the unit weight of the saturated sand in its dense state. Take the unit weight of water yw as 10 kN/m³, and the mass density of water as 1000 kg/m³.

A completely mixed activated sludge process operating at equilibrium is designed to treat 300 MLD of waste water. The influent and effluent BOD are 200 mg/1 and 18 mg/1 respectively If the F M then the hydraulic retention time is A 0.125 day B 4.21 hours C 8.42 hours D 0.225 day = 0.3 and MLSS is 3800 mg/1,

calculate the Amott Harvey wettability index for each core and explain the wetting characteristics of each core

An amount of Sand weighs 500g in stock condition and 480 g in oven dry condition. If absorption capability of the sand is 1.2%, calculate MC(SSD) for the

A given sludge with 98% moisture content is X times more bulky than with 95% moisture content. The value of X is ______

2. An oil having a specific gravity of 0.80 has a kinematic viscosity of 2x10$ m²/s flows in a 100mm diameter pipe at a rate of 0.001m³/s. a. Compute the Reynolds number b. Determine the equivalent absolute viscosity c. Determine the centerline velocity

The test Carried aut en an follow. detaits sludge Somple are Weight of Dish =9.52gm Baw Sludge Sempla and duch =23 27ga Aşter Drying Clnstent) After Burning Clnstant) = 6.38gm 9.46gm %3D %3D Calculkt th percentage of total Salidl ad lloldi Solid in t cboue of cowego.

Question 1 d. A soll sample weighs 1.5 N. Its clav fraction weighs 0.34 N. If its liquid limit is 60% and its plastic limit is 26%, comment on the swell-shrink potential of this sonl. ng a water content of 15% and a

solve question 10 please