Biogas system design for cooking for a family of 9 members is considered here. The system design includes the estimation of total gas required, amount of feedstock (or dung), required and the number of animals required to have feedstock of a given amount. Following assumptions are made for the design: 1- About 350-450 liters of biogas required per day per person for cooking (in engine about 450 liters/hp/hour of biogas is required) 2- Average production of dung per animal per day: (Cow:10 kg/day, Bullock:14 kg/day and Buffalo:15 kg/day) 3- Other assumptions are: 1000 liters of gas is equivalent to 1 m3 of gas, average gas production from dung is about 40 liters/kg of fresh dung and retention period of dung slurry in digester is 50 days. Find 1- Bullocks 2- Buffalos 3:46 PM

Biogas system design for cooking for a family of 9 members is considered here. The system design includes the estimation of total gas required, amount of feedstock (or dung), required and the number of animals required to have feedstock of a given amount. Following assumptions are made for the design: 1- About 350-450 liters of biogas required per day per person for cooking (in engine about 450 liters/hp/hour of biogas is required) 2- Average production of dung per animal per day: (Cow:10 kg/day, Bullock:14 kg/day and Buffalo:15 kg/day) 3- Other assumptions are: 1000 liters of gas is equivalent to 1 m3 of gas, average gas production from dung is about 40 liters/kg of fresh dung and retention period of dung slurry in digester is 50 days. Find 1- Bullocks 2- Buffalos 3:46 PM

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

A fuel contains 78wt% carbon and 22wt% hydrogen (H). Combustion results in the following composition by volume (dry basis): CO2 : 9.41 CO : 1.69 O2 : 3.8 N2: 85.1 The following equations describe the chemical reactions taking place: CO+0.5 O2→ CO2 C+O2→ CO2 H2 + 0.5 O2 → H2O C+0.5O2→ CO On the basis of 120 lb moles of dry flue gas, the O2 required (lb moles) for complete combustion is most nearly. Find the amount of O2 needed for the completion of combustion
What is the Molecular weight of a certain volatile liquid which is placed in 225 g flask which has total capacity volume of 252.17 mL. After the liquid was heated to 96.7 oC the gass volatilized and the weight of the flask measure 227.33g. What is the could be the MW of the volatile sample?
Cereal is being dried in a vertical drier by air flowing countercurrent to the cereal. To prevent breakage of the cereal flakes, some of the exit air from the drier is recycled back to mix with the the moist fresh air. For each 1000 kg/hr of wet cereal fed to the drier, calculate the input of moist fresh air in kg/hr and recycle rate in kg/hr. The available data on stream compositions is (fractions): For water: Fresh air: 0.0132 Wet cereal: 0.200 Exit air: 0.263 Dried Cereal: 0.050 Air entering Dryer: 0.066
SpaceX recently launched their Falcon Heavy rocket (Feb. 6, 2018). It is based on their existing Falcon 9 rocket. The Falcon 9 rocket has a first stage which is a 40 m high by 3.7 m diameter cylinder. This cylinder contains the fuel used to propel the rocket which consists of RP-1 (rocket propellant-1, high grade kerosene), and liquid oxygen, O2 (`). RP-1 is a complex mixture of hydrocarbons but let’s approximate it with a chemical composition of C12H26. The densities of the fuel are ρ (RP − 1) = 0.83 g cm3 ρ (liquid O2) = 1.141 g cm3 If the total volume available for the two tanks is contained in the 40 m high by 3.7 m diameter first stage, determine the volume of each individual tank that will provide the exact amount of RP-1 and oxygen for the reation (no limiting reagent) and take up the entire volume of the first stage. Here are some suggestions to guide you. 1. Write a balanced combustion reaction for C12H26 with O2. 2. Determine the ratio of the volumes of the individual RP-1…
(a) Water in vadose zone contains chlorobenzene of concentration 40 mg/L. What is the equilibrium concentration soil air in contact with this solution? (b) An aquifer with porosity 0.3 has distribution coefficient of TCE as 100 L/kg. What fraction of TCE is in aqueous phase and sorbed phase of the soil?
stack gas analysis: 83.08% N2, 7.5% CO2, 2.3% CO, 1.12% H2, 6% O2 with a saturation temperature of 54°C at 400°C and 760mmHg. a) %excess of air (1000 m^3 of air is supplied, produced 3100 m^3 of stack gas) b) chemical formula of the fuel burned c) analysis of the fuel mixture
Gypsum (plaster of Paris : CaSO,. 2H,0) is produced by the reaction of calcium carbonate and sulfuric acid. A certain lime stone analyzes: CaCO, 96.89 %; MgCO, 1.41 %; inerts 1.70 %. For 5 metric tons of limestone reacted completely, determine: a. kg of anhydrous gypsum (CaSO,) produced. b. kg of sulfuric acid solution (98 wt%) required.
The combustion gases from an industrial furnace using a hydrocarbon fuel and dry air enter the stack gas at normal barometric pressure and 3750F and have the following Orsat analysis: 12.2% CO2, 3.1% O2, 1.2% CO, and 83.5% N2. Determine the following: (a) The percent excess air (b) The volume of gases entering the stack, expressed as cubic feet per pound of carbon burnt in the furnace (c) The dew point of the stack gas (d) The atomic ratio of hydrogen to carbon in the fuel (e) The mol of stack gas per atom of carbon burnt
The oxidation of ethylene to produce ethylene oxide proceeds according to the equation2C 2H 4 +O 2 ! 2C 2H 4OThe feed to a reactor contains 100 kmol C 2H 4 and 100 kmol O 2. If the reaction proceeds to completion, how much of the excess reactant will be left; how much C 2H 4O will be formed; and what is the extent of reaction?
Combustible vapor-air mixtures are flammable over a limitedrange of concentrations. The minimum volume % of vapor thatgives a combustible mixture is called the lower flammable limit(LFL). Generally, the LFL is about half the stoichiometric mix-ture, the concentration required for complete combustion of thevapor in air. (a) If oxygen is 20.9 vol % of air, estimate the LFL forn-hexane, C₆H₁₄. (b) What volume (in mL) of n-hexane (d=0.660 g/cm³) is required to produce a flammable mixture of hexane in 1.000 m³of air at STP?
Gasoline having a chemical formula C3H17 is burned in an engine at a fuel-air equivalence ratio ø=1.19 and a temperature of 1000K. a) Write the stoichiometric combustion equation of the fuel; b) Write the reaction equation corresponding to the given fuel-air equivalence ratio.
The label has come off a cylinder of gas in your laboratory. You know only that one species of gas is contained in the cylinder, but you do not know whether it is hydrogen, oxygen, or nitrogen. To find out, you evacuate a 5-liter flask, seal it and weigh it, then let gas from the cylinder flow into it until the gauge pressure equals 1.00 atm. The flask is reweighed, and the mass of the added gas is found to be 13.0 g. Room temperature is 27°C, and barometric pressure is 1.00 atm. What is the gas?