Describe a South African example on the re-use of sludge from pit latrines
Q: What is the standard level of potassium concentration that can be found on wastewater ?
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- This question about Sanitary Engineering ........................ involve a physical change such as screening, grit removal, Separation, Crystallization, Evaporation, Filtration, & other reactions. • A. Unit operations • B. Unit processes • C. Both A and B • D. NoneWhat is the standard level of potassium concentration that can be found on wastewater ?3. Circular clarifiers are used to remove solid materials from water. They allow continuous treatment of water and can handle fairly large flows. Solids settle to the bottom of the clarifier and are carried away by a small stream of water (the waste stream). Most of the water exits the tank as treated effluent. Assume a clarifier receives a flow of 0.10 m3/s with a solid concentration of 800 mg/L. If the waste stream consists of 3% of the incoming flow and carries 90% of the incoming solids, a) what is the solids concentration in the waste stream, and b) what is the solids concentration in the treated effluent?
- Please include Equations. This is for a water and wastewater treatment review, it is not for a grade I just need to understand the problem.Explain the following terms as used in sludge processing:a) Alkalinity,b) Hydraulic detention time,c) Solids retention time,d) pH,e) Temperature,f) Gas production.Example (Activated Sludge Process) - Completely Mixed with Recycle A completely mixed activated sludge process, treating a municipal wastewater, has a primary clarifier effluent BOD, of 135 mg/L. The design MLSS is 3590 mg/L, and the MLVSS is 80% of the MLSS. The plant permit is for an effluent BOD, of 20 mg/L and 20 mg/L suspended solids. The effluent suspended solids have a BOD, of 0.65 mg BOD, / mg suspended solids. The underflow solid concentration (MLVSS) is 10,000 mg/L. If umax = 3.0 day, Ks 60 mg/L, Y= 0.50 mg MLVSS / mg BOD, removed, ka= 0.1 day, and the influent flow is 0.25 m/sec, determine the following: 1. The required reactor detention time, 0. 2. The reactor basin volume, V, in m³. 3. The net waste activated sludge produced each day (kg/day). 4. The mass of solids (both volatile and inert) to be wasted each day (kg/day). The return sludge flow rate the recycle ratio. 6. The F/M ratio. 7 June 2021 Dr. Dawood Eisa Sachit Biological Wastewater Treatment 47
- 6. A tertiary treatment plant treats a municipal secondary effluent and is to employ fixed-bed carbon adsorption columns. Parallel treatment using two rows of two columns in series (in other words, a total of four columns) will be used. From batch-type slurry tests it has been found that 0.42 g COD/g carbon is adsorbed when Ce = Co. Pertinent data are as follows: flow = 5700 m³/d, COD in feed to carbon columns = 20 mg/L, contact time function based on an empty carbon bed = 30 min, and unit liquid flow rate= = 4.4 L/s-m². Each column is kept on-line until the entire mass of carbon in the column is completely exhausted. Determine: The volume of each column, m³. a. b. Page 2 of 3 C. d. e. The diameter and height of each column, m. The mass of carbon in each column if the packed density is 400 kg/m³. The kilograms of carbon exhausted per day if the COD removed is assumed to be 98%. The on-line time for each of the columns.An impellar blade unit operates at 50 rpm. Determine the degree of mixing? Also if the blade operates from 50 rpm to 100 rpm what is the percent increase?Southide Water Treatment Plant of Tyler, TX What are the general characteristics of the waste water entering the plant?
- Give me right solution Determine the initial and final turbidity? Assuming this is an aluminum sulfate coagulation result.(Explain how to solve this)Q2: (12.5 Marks) Two-stage softening: A water with the ionic characteristics shown below is to be softened by the lime-soda-ash-excess-lime process. The lime used is (85 %) pure and the soda ash is (85 %) pure And a flow of (5×10³. m³/d), Calculate? 1- Draw the treatment units scheme 2- Calculate the (SO4) Concentration in mg/L unit? 3- Calculate the required chemical quantities in (meq/L) unit.? 4- Draw a bar diagram of the finished water.? 5- Calculate The Total Hardness in mg/L Unit? Element CO₂ Ca+2 Hardness Mg+2 Hardness Na+1 Alkalinity SO42 CH¹ K+1 HCO3¹ 90 37.5 62.5 Concentration 6.6 mg/L as mg/L as 19.55 mg/L as ? 42.6 13.685 (mg/L) (CaCO3) (CaCO3) (CaCO3) 39.1 Atomic Mass 44 40 24.3 23 96 35.5a) Draw a neat sketch of Activated Siudge Process and discuss how SVI, return sludge wasted sludge and organic load effect the design of aeration tank in activated sludge process?