An activated sludge system operates at a flow rate of 400 m'/day with an incoming BOD of 300 mg/L. If F/M ratio and suspended solids under aeration are 0.5 and 30000 grams, Determine; (i) BOD removal efficiency (ii) The volume and dimensions of aeration tank if solids concentration is 4000 mg/1. (iii) Detention time of aeration tank

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Cost control

Cost control or management in property or project management is the process by which managers maintain costs under human resource management, assets, and capital expenditure to ensure that the project ends on a budget basis. Cost management depends on reasonable estimates and ongoing monitoring during the project. As a result, good cost control is essential for any construction business that wants to succeed.