A typical biological process in treating waste water using aerated lagoon can be described by one of the following schematic diagrams CI, (A) I-BR AL CI, CH ST (B) BR ST AL CI, |E_ (C)--BR AL ST E (D) )-BR AL ST CH

A typical biological process in treating waste water using aerated lagoon can be described by one of the following schematic diagrams CI, (A) I-BR AL CI, CH ST (B) BR ST AL CI, |E_ (C)--BR AL ST E (D) )-BR AL ST CH

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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An industrial waste with a flowrate of 110 L/min contains 40 mg/L of zinc. Calculate: 1.) the pH required to maintain a zinc concentration of 2.6 mg/L (EPA's industrial limit for discharge into a sanitary sewer), and 2.) the dose of hydrated lime (Ca(OH)2) required (g/min).
2) Two aggregates (Al and A2) were obtained from the field. They were brought to the oven dry condition (OD) and weighed. Data for each of the aggregates is presented in the table below. (Density of water=1g/cm') Table 1. Absorption capacity and moisture content data. A1 A2 Field Weight 600 g 600 g 598.3 g Oven Dry Weight Absorption Capacity (%) 0.6 % 595.3 g 0.7% a) Describe the field moisture state of each aggregate, Al and A2 (i.e. wet, SSD, or air dry). For each sample would you add water or dry the sample to bring it to SSD state? Determine the expected mass of each sample in the SSD state. b) If the bulk volume Al oven dry is 220 cm and the bulk volume of A2 oven dry is 250 cm2, determine the bulk oven dry specific gravity for each aggregate, Al and A2. MONSTER E12 PRT SC PAUSE う

QUESTION 17 State the difference between a listed and a characteristic hazardous waste. List four characteristics for which a substance will be characterized as hazardous. T T T Arial 3 (12pt) v T-=-E -
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