Solid Waste Engineering
Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Chapter 4, Problem 4.17P
To determine

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س 1 تم أخذ قرار استثماري من قبل احدى الشركات المتخصصة في مجال البيئة والطاقة بالدخول في مشروع انشاء ابنية مستدامة وثبتت الشركة رغبتها بالحصول على عائد سنوي ثابت مقداره 50,000 دولار لمدة ثمانية سنوات بالاضافة الى عائد يغطي سداد ايجار مقر الشركة مقداره 35,000 دولار كل اربع سنوات, فاذا كانت المصاريف التشغيلية السنوية 20,000 دولار و نسبة الفائدة 10% % ماهو المبلغ الواجب استثماره من قبل الشركة لغرض تحقيق هذه العوائد؟ س2/ احسب القيمة المستقبلية المكافئة ( Future worth value ) للمشروع الاستثماري المبينة بياناته الاقتصادية في ادناه رأس المال Investment Cost الفقرة تكاليف التشغيل السنوية Annual Operating Cost العوائد السنوية Annual Revenue عمر المشروع Useful life Interest rate نسبة الفائدة Inflation rate نسبة التضخم المبلغ ($) 800,000 30,000 150,000 10 years 12% 4%
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A lagoon with volume 1,300 m3 has been receiving a steady flow of a non-conservative waste (rate constant= 0.19/day) at a rate of 80 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 12 mg/L.  A. What would be the concentration of pollutant in the effluent leaving the lagoon?  B. If the input waste concentration suddenly increased to 110 mg/L, what would the concentration in the effluent be 8 days later?
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