Question

Caleulate the 0.45 ppm NO, concentration at 25°C and 1 atm pressure as mg/m' and ug/m 5. Estimate the stoichiometric air to fuel ratio for a 100% ethanol (CHCH2OH) fuel One mole of CH,CHOH-46g: one mole of O;-32g; one mole of N, 28g Assume the following reaction. 6 CH CH,OH+36 O; +135.36 N;12 CO + 18 H,O+135.35 N (Ans:18) Solid waste with the density of 110 kg/m is spread in a 0.5m layer at a landfill. If a steel wheel ed compactor can achieve a density of 400 kg/m, what thickness of waste will be achieved? (Ans:0.14 m) 7. Estimate the weekly volume of solid waste being delivered to a municipal landfill if the average solid waste generation rate is 2.6 kg/person d. The population is 17,200 and the density as delivered is 122kg/m (Ans: 2,600 m/wk) The total solid concentration of a water sample is 400 mg/L and 40% of the total solids is volatile The suspended solids concentration of the sample was determined as 300 mg/L and 30 % of the suspended solids is volatile. What is the dissolved solids concentration? 10. The primary sludge is produced at a rate of 1,200 gals/day at a solid concentration of 4%. The amount of solids in lbs/day the primary sludge is

Answer 1

PV R T Ideal gas Law, Fronn RT R univensal gas constart a.osx1O ctm.3 ma oK T= absdule lemp, ok -6 8a.05xiO a5+a73 1 P= PYesuse, atm O. oa44 m' - V = Vdume ocupied be & 4. 4 xi0m' gas In Vdume occapied by sc 1atm M gm of gas -3 3 24.4x1o m 1m of gas weighs M 24.4 xio 1Pont of jas 1motsas 1PPM M 10Parts of gas &o49as 2 344x1oo m3 3 244Xi03 1 000 M 24.4 O.45PPM No Concenttaion 1000x 53a) 24. 4 19 a6. a3 ug/m - 1926 m/m

110 k/m Solid waste density 7. 40o ka/m3 Compacted densih O.5 m Land fill thickness 400 3.636 Compaction Yalio 110 Oo 5 m Compacted thickness 3.636 O.1315 mm O.14m 2. cka/Person/day Soid waste geneyalionyake 11,2 oo Population 2.G K9/ pesucdayXI7,200 Salid waste genenated 4.4720 ka/day 44120X 31 3040 kg/uweek density of Solid aste 1 22 Voume geneneted 2 1 3040 week 122 week 2S 65.9 m/week a600 Sludge production Yate 10 gals/day 4542.49 u/doy solids comcentahion 4% = 3.185 Moisture -96% Concentahon of Solids = 40omg/

Mass of sdids O. O04S MLDX 400 Ma/ .816 k9/day Solids 47 4 kg solids o0 Kg Sudge 2 skg sludge 1ksdids 45. 434 kg/ day 1.16 kg PYoduces - Oo. 42 Frop/sqn Ai to fueL Yatio From the given chemical Ewation 36X3a 135.36x88 N2 Co2+N2 Air Fuel e thand 6 X 46 11.9a 1.3 disscdved Suspended TOTal Solids dissofved 3 OO 400 100 mg/ dissdved sdids