1. A commercial laundry is consdiering constucing an ion exchange process to remove hardnessfrom water used in laundering oerpations. The laundry uses 1000 m/d of city water with Ca2+at 4.5 meq/L and Mg2* at 2 meq/L. Their goal is to reduce total hardness (TH) to 1 meq/L. Thesoftening resin has a TH capacity of 60 kg-TH/m of media with a recommended hydraulicloading rate of 0.4 m/(m2 min). Renegeration can be accomplihsed using 100 kg NaCl per m ofion exchange media in a 15% solution at a hydraulic loading rate of 0.04 m/(m² min). Theexchanger tanks available to the laundrey have a diamter of 1 m.1. What is the total bypass-water flow rate (m/d)?2. What is the total daily resin volume required to soften the water (m³/d)?3. How many exchanger tanks are required for a one-day operation cycle?4. What is the resin bed depth (m) in each exchanger tank?5. What is the daily volume of NaCl regenation solution used per tank (m/d)?6. What is the time period required for resin regeneration in any single tank (min)?

STEP 1 Qreq = 1000m3/daycolumn = 200mg/l as caco3magnesium =100 mg/l as caco3absolute hardness ought…

The laundry uses 1000 n in laundering oerpations. Mg2+ at 2 meq/L. Their goal is to reduce total hardm as a TH capacity of 60 kg-TH/m³ of media with a re 4 m/(m² min). Renegeration can be accomplihsed u edia in a 15% solution at a hydraulic loading rate of available to the laundrey have a diamter of 1 m. tal wnter flow rate (m3/d)?

The laundry uses 1000 n in laundering oerpations. Mg2+ at 2 meq/L. Their goal is to reduce total hardm as a TH capacity of 60 kg-TH/m³ of media with a re 4 m/(m² min). Renegeration can be accomplihsed u edia in a 15% solution at a hydraulic loading rate of available to the laundrey have a diamter of 1 m. tal wnter flow rate (m3/d)?

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter1: Introduction

Section: Chapter Questions

Problem 6CQ

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