What is the function of boiler feedwater economizer in selective catalytic reduction (SCR) technique?

Q: What are the advantages of forced oxidation (external) system?

A: forced oxidation (external) system- It is defined as the method which in the construction industry…

Q: Why positive corona is used for all indoor air-cleaning applications even though it is less…

A: In an Electrostatic precipitator, an electrical breakdown of electrons happens near the wire when…

Q: What are the disadvantages of surface condensing systems?

A: The surface condenser is indirect heat exchange and the vapor and condensing medium is separated by…

Q: What are the advantages of surface condensing systems?

A: The surface condenser advantages as follows: 1. The atmospheric phenomenon is used as boiler feed…

Q: What are the benefits of the use of chilled ammonia systems in capturing CO2?

A: Solution: Chilled ammonia process can be generally used to capture the the carbon-dioxide from…

Q: Topic : Removal of Azo Dyes in Wastewater Using Bubble Treatment Discuss and mention about Bubble…

A: A substantial quantity of dye wastewater, which includes very poisonous metal complex colors, is…

Q: Explain the process of capturing CO2 using chilled ammonia systems ?

A: The chilled ammonia method absorbs the carbonic acid gas at coldness (2–10 ∘C). the warmth of…

Q: role of a transfer station in Municipal solid waste collection

A: Role of transfer station in municipal solid waste collection :

Q: A baghouse that employs a shaker collection method is being designed to remove sawdust particles…

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Q: What is the function of a soaker hosemin a biofilter?

A: Biofilter  Biofiltration is a pollution control technique using a bioreactor containing living…

Q: 47. What is called for the process of burning municipal solid waste in a properly designed furnace…

A: Municipal solid waste is to be treated effectively in order to maintain hygiene in society. There…

Q: Explain Catalytic incinerators.

A: Incinerators is a furnace which is used for burning waste . Catalytic Incinerator which is also…

Q: Define contacting power in wet scrubbers? How is it related to scrubber efficiency ?

A: Solution: Wet scrubber basically tells about the variety of devices that generally remove pollutants…

Q: A control, process for a glass furnace will remove boron from the 1400 oF furnace by cooling the…

A: Draw a preliminary flow sheet for the process;

Q: How can we adjust air/fuel ratio in the low NOx burners?

A: Air to fuel ratio AFR Thermal engines require fuel and oxygen (from the air) to deliver energy…

Q: Which factors enhance the absorption of a pollutant in a scrubber?

A: factors that can enhance the absorption of pollutant in scrubbers:- Proper pump size :  To…

Q: A: What is the purpose from returning the activated sludge (Biomass) to the aeration tank ?

A:

Q: List out the equipments use to remove gaseous pollutants using principal of absorption.

A: The phenomenon of holding the components in any phase on its surface and the phenomenon is…

Q: What is the importance of burner spacing in the low NOx burners?

A: Solution: If burners are not placed with sufficient spacing , the flames gets generally merged that…

Q: Sanitary engineering laboratory The residual chlorine (Free chlorine) test  just write a general…

A: Chlorination is defined as adding of chlorine in raw water either in the form of chlorine…

Q: What ared the applications of condensers in the air pollution control devices?

A: A condenser is a vessel that changes vapor to liquid. It is used to pump the vapor and return back…

Q: What is the best air pollution control technology to be used in clinical incinerator ?

A: In air pollution control technology of the clinical waste incineration is:

Q: What is the industrial combustion coordinated rule-making (ICCR) process?

A: 189 harmful air pollutants (HAPs) were listed for possible legislation inside the Clean Air Act…

Q: Explain the process of Reduced air preheat?

A: Solution: Air preheater is the any device that is designed to heat air before any other process for…

Q: Why is the electrostatic precipitator unique among air pollution control devices?

A: Brief Concept Introduction- Electrostatic precipitator- It is an air pollution control device and…

Q: Consider a 98% efficient ESP which removes, fly ash from combustion gases flowing at 100 m3/sec. The…

A: Given: The resistivity of ash is 1.0×(10)10 ohm-cm. The flow rate is Q=100 m3s. The efficiency,…

Q: What is the function of air-straightening vanes in selective catalytic reduction (SCR) technique?

A: Brief concept introduction- Selective catalytic reduction (SCR) technique- It is a technique by…

Q: Explain the negative corona charging field method used to charge the particles in electrostatic…

A: In corona charging, particles are bombarded by either positive or negative ions generate in a corona…

Q: State the theoretical principle on which each of the following air pollution control devices…

A: The theoretical principle on which following air pollution control devices operate. 1. absorption…

Q: What are the main disadvantages of using a heat exchanger to cool the exhaust gases?

A: The heat exchanger cools the exhaust gas by recovering the heat energy of reciprocating diesel, gas…

Q: Question Two Prepare a data sheet & calculate the cost of painting a top and all sides of a Platform…

A:

Q: What is the function of the catalytic converter in a vehicle?

A: A catalytic converter is an exhaust emission control device that reduces toxic gases and pollutants…

Q: Particulate removal on a certain gas stream must be 98.5% efficient to meet standards. If a…

A: Solution; Given that; η0=0.985ηcyclone=0.60

Q: What is the collection efficiency of venturi jet scrubbers?

A: Brief concept introduction- Venturi jet scrubbers- These jet scrubbers have a converging-diverging…

Q: What is a extra lean-burn engine?

A: The extra lean-burn engine is defined as the engine in which the mixture of air to fuel is lean…

Q: Filtration is best suited for viscous liquids containing particulate matter. a.False b.True

A: Filtration The process of filtering eliminates particles suspended in water. Numerous processes,…

Q: Calculate the Gross and Net calorific values of a coal having the following compositions, C = 63 %,…

A: Given: C = 63% H2 = 19% O2 = 3% S = 13% Ash = 2

Q: What is the importance of the ideal gas law to air pollution engineers?

A: Ideal Gas Law The Ideal Gas law having important relations because it is an equation of states which…

Q: What are the applications of gas absorption in pollution control?

A: Absorption:  Absorption or scrubbing involves bringing contaminated effluent gas (the ascorbate or…

Q: For each of the following indicate if the designated technology is appropriate for the indicated…

A: Consider the first statement. A 60-micron household filter for cryptosporidium.

Q: Please asap... One air emissions treatment (system) requires a removal rate of 98.5%. It is known…

A:

Q: What is the effect of Inlet gas velocity on the efficiency of a cyclone seperator?

A: Cyclone separators are used to remove the particulate matter in air or other gas streams at low cost…

Q: Calculate the required power of the optimum in-line blender for an alum coagulant in the coagulation…

A:

Q: For each of the following indicate if the designated technology is appropriate for the indicated…

A:

Q: Propose THREE (3) strategies for the control of volatile organic compounds (VOCS) in indoor air.

A: Volatile organic compounds (VOCs) are the chemicals which are found in various products which are…

Biological Processes

Biological solid waste includes bacterial and contaminated waste produced by living individuals. Its treatment is essential to prevent the spread of any air-borne or water-borne diseases or diseases transmitted from one organism to another in a food chain. There are many benefits of the biological solid waste treatment and some of them are: the minimized quantity of waste substance, waste control, eradicating any disease-causing pathogens, generation of biogas, composting, anaerobic digestion, bio drying, mechanical biological treatment, microbial fuel cell, phytoremediation, and biofiltration. The final products of the biological solid waste treatment may be recycled to obtain organic fertilizers or disposed of in SWDS (Solid Waste Disposal Site) after proper treatment.