A homeowner collects her paper, cardboard, yard waste, and food waste for composting. Given below are the amounts in kg of the waste that she collects. She knows that for a successful compost, she must have a molar ratio of C:N of 20:1 or lower to succeed. What is the C:N ratio? Is her compost recipe going to succeed?
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- A sample of dry solid waste has the following composition: 531 g carbon (C), 133 g hydrogen (H), and 335 g oxygen (O). How many Litres of air is required to combust the waste? Answer: Check18- The typical municipal solid waste with the average composition is (mass of food waste = 15 lb and Energy = 2000 Btu/lb, mass of Paper = 44 lb and Energy = 7200 Btu/lb, mass of Textile = 2 Ib and Energy = 7500 Btu/lb, mass of Rubber = 0.5 lb and Energy = 10000 Btu/lb, mass of Garden trimming = 2 Ib and Energy = 2800 Btu/lb, mass of Wood = 2 lb, and Energy =8000 Btu/lb, mass of Glass= 8 lb and Energy = 60 Btu/lb, mass of Tin cans = 9 lb, and Energy =300 Btu/lb, Dirt, mass of ashes, bricks, etc.= 4 lb, and Energy ashes, bricks, etc.= 3000 Btu/lb), The energy content of typical municipal solid waste isQ4 Estimate the energy content of a solid waste sample with the composition below and what is the content on a dry basis and on ash free dry basis? Component Percent by mass Energy kJ/kg Food waste Paper Cardboard Plastics Garden trimming Wood Tin cans Total 15 45 10 10 10 5 5 100 Based on 100 kg sample of waste Moisture content% 70 6 5 2 60 20 3 4,650 16,750 16,300 32,600 6,500 18,600 700
- *: Determine the energy Value of typical municipal solid wastes with the average composition shown in Table below Solution 1. Assume the heating value will be computed on an as-discarded basis. 2. Determine the energy value using a computation table Computation of energy contents Component Solid Wastes Energy Total energy Btu % lb. Btu/lb Food waste 15 2,000 Paper 40 7,200 Cardboard 7,000 Plastics 3 14.000 Textile 2 7,500 Rubber 0.5 10,000 Leather 0.5 7,500 Garden trimming 12 2,800 Wood 8,000 Glass 8 60 Tin cans 6. 300 Non ferrous 1 Ferrous 300 Dirt, Ash,and 4 3,000 brick Ans: 4762Btu/lb18- The typical municipal solid waste with the average composition is (mass of food waste = 15 Ib and Energy = 2000 Btu/lb, mass of Paper = 44 lb and Energy = 7200 Btu/lb, mass of Textile = 2 Ib and Energy = 7500 Btu/lb, mass of Rubber = 0.5 lb and Energy = 10000 Btu/lb, mass of Garden trimming = 2 Ib and Energy = 2800 Btu/lb, mass of Wood = 2 lb, and Energy =8000 Btu/lb, mass of Glass= 8 lb and Energy = 60 Btu/lb, mass of Tin cans = 9 lb, and Energy =300 Btu/lb, Dirt, mass of ashes, bricks, etc.= 4 lb, and Energy ashes, bricks, etc.= 3000 Btu/lb), The energy content of typical municipal solid waste is a- 4255 Btu/lb O b- 4289 Btu/lb c- 4239 Btu/lbCan I get a thorough step by step for the following question? The US EPA requires hazardous waste incinerators to meet a standard of 99.99% destruction and removal of organic hazardous constituents injected into the incinerator, which is referred to as "four nines DRE". The efficiency is calculated by measuring the mass flow rate of organic constituents entering the incinerator and the mass flow rate of constituents exiting the incinerator stack, as shown in Figure 1. Draw a mass-balance diagram and determine the allowable quantity of contaminant in the exit stream if the incinerator is burning 1.2000 g/s of hazardous constituents. If the incinerator is 96% efficient in destroying the hazardous constituents, what scrubber efficiency is necessary to meet the EPA standard?
- A truck dumped industrial waste into a pit. They found the truck 3 days ago with a pure pool of waste. Your lab finds the BOD5 of this waste to be 80 mg/L with a k=0.1/day. What was the waste source? Here are the 3 nearby suspects: Winery BOD ultimate = 275 mg/L Vinegar manufacturer BOD ultimate = 80 mg/L Pharmaceutical BOD ultimate = 200 mg/LExample 5-3 Using the typical percentage distribution data in the given table below, estimate the number of Kj/Kg of the remaining solid wastes if 90 percent of the cardboard and 60 percent of the paper were recovered by homeowner Component Percent by weight Organic food wastes 9.0 Paper 34.0 Cardboard 6.0 Plastics 7.0 Textiles 2.0 Rubber Leather Wood 0,5 Yard wastes 18.5 Inorganic Glass 0.5 2.0 8.0 Tin cans 6.0 Aluminum 0.5 Other metal 3.0 Dirt, ash, etc. 3.0 Total Energy kJ/kg Total energy Kj 4720 16747.2 16282 32564 17445 23260 17445 6512.8 18608 139.5 697.5 697.5 6975 42480 570000 97692 227948 34890 11630 8722.5 120486.8 37216 1116 4185 2092.5 20925CHAPTER 7 WASTE HANDLING AND SEPARATION, STORAGE AND PROCESSING AT THE SOURCE Q4 Estimate the energy content of a solid waste sample with the composition below and what is the content on a dry basis and on ash free dry basis? Percent by mass Moisture content % Component Energy kJ/kg Food waste Paper Cardboard Plastics Garden trimming Wood Tin cans Total 15 45 10 10 10 5 5 100 Based on 100 kg sample of waste 70 6 5 2 60 20 3 4,650 16,750 16,300 32,600 6,500 18,600 700
- Solid Waste Management On daily basis, and for six months a family brought to the home 60.0 lb of consumer good (food, newspaper, magazines, etc. The family consumes 10.0 lb of food that day, and 6.0 lb of food is stored. Paper is 35% of the waste produced and all of it goes to the fireplace except magazines. The magazines received represent 15 percent of the paper wastes of the day, and they are not thrown away. If bottles and cans represent 60% (by weight), and are recycled by the family. Twenty- eight percent of the paper waste (35 percent total) is burned in the fireplace. Calculate the following: A- The amount of solid wastes disposed from the home during one-day period. B- The amounts of bottles and cans that can be recycled over the six months' periods) You are setting up a composting batch and have 8 tonnes (metric tons) of poultry litter with a C:N of 14, a dry weight % of N of 2.7%, density of 500 kg/m³, and a moisture content of 33%. You are aiming for a C:N of 25:1 for optimal composting performance, so you are considering several options of other wastes to make up your batch. The following table shows the moisture content, C:N and cost per tonne of each material. You estimate that you will lose 20% of the initial mass during the composting process. Determine which would provide the best return on investment if you can sell your compost for $80/m³ and the density of the finished compost is 400 kg/m³. Waste Type Shredded newsprint Sawdust RDF Moisture content 18 40 45 C:N Dry % N 152 0.2 530 0.1 60 1.1 Cost/tonne $200 $110 $80The majority of municipal solid waste is 64% paper. What ways would you suggest to reduce paper waste?