Environmental Engineering: Cyanide is used in the production of intermediates in the pharmaceutical industry. A small resulting waste stream containing an organic cyanide, R-CN, is to be treated by high a temperature degradation process that has a constant rate of 8 hr-1 (at 170oC). What size of Plug Flow Reactor (PFR) is required to reduce the R-CN concentration from 2000mg/L to 5mg/L, for a waste stream with a flow rate of 30L/min? Assume temperature remains constant in the PFR.

Q: 5. A disinfection process destroys E.coli in water. The influent c coliforms/mL. If the reactor…

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Q: OD is widely used tomeasurethe concentration of biodegradable organic matters in a wastewater. For a…

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Q: An activated sludge reactor produces the wasted sludge with 1% of the solid content. What is the…

A: 1 % SOLID CONTENT

Q: Disinfection by-products: why are they a problem, how are they formed, and how does a conventional…

A: Disinfection by-products : Disinfection by-products are chemical, organic and inorganic substances…

Q: = A waste stabilization pond is used to treat a dilute municipal wastewater before the liquid is…

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Q: Dinitrogen tetraoxide (N204) decomposes into nitrogen dioxide according to the following balanced…

A: To solve the given problem, we need to follow these steps Part (a): Calculate the equilibrium…

Q: 1-6. Įn a biological waste treatment system, solids may enter (b) Solids decay in the reactor at a…

A: Consider the given equation rs=-k1s2XS2+KsWhere,X=VSS concentration in the reactorAlsok1=8 mg DOCmg…

Q: Water with 90 mg/L of a degradable contaminant flows through a reactor. The influent flow rate…

A: Given, Degradable contaminant flow,D0=90 mg/lFlow rate = 100 m3/dReactor Volume V=200 m3kd=1.0 d-1

Q: thermal oxidizer incinerator operates as a plug flow reactor at a temperature of 250 deg C. The…

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Q: Manufacturing often requires self generation of ultrapure water (UPW), and the primary use of this…

A: If the particular chemical that is added at the rate W is not removed at all in the UPW treatment,…

Q: Consider CSTRs in series follows a first-order reaction with the same rate constant as shown in…

A: SOLUTION:

Q: The plant separates out a fairly clean fraction of copper scrap, which contains 1.5 tonnes of copper…

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Q: A CFSTR receives a flow rate of 100 m³/sec. There is one influent stream coming into the reactor and…

A: Given data: Flow rate received by the CFSTR: Q=100 m3/s The concentration of the chemical in…

Q: BOD is widely used for measuring the concentration of biodegradable organic matters in a wastewater.…

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Q: (a) Prove that for a first order decay reaction (k1= 2 days-1) taking place in reactors of identical…

A: k = 2 days-1 (first order rate constant)V=Reactor volume= 15 LCin=Inlet contaminant concentration =…

Q: 1) Estimate the biomass concentration in a CSTR aeration tank with the following operating…

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Q: Q2) A waste of 600 m/hr flow rate with an ultimate BOD0 = 140 mg/l is to be treated in an activated…

A: Q = 600 m3hr y = .65 kd = .055 /day So = 140 mgl Se = 20 mgl θc= 10 days

Q: Design a laboratory scale chemostat to aerobically treat a 10 liters per day of a synthetic…

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Q: A liquid waste at 20 deg. celcius has ultimate BOD of 250 mg/L, and a decay rate constant of…

A: a) BOD ultimate of river after mixing     BODu=QRBODuR+QwBODuwQR+Qw     BODu=960+12509+1…

Q: An ASP operating at equilibrium has an organic loading rate of 2 kg/m³/d and has MLSS of 3000 ratio…

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Q: 1. Industrial representatives claim that the NAAQS for S02 is so low that one exceeds it if one…

A: The objective of the question is to calculate the concentration of sulfur dioxide (SO2) in a room…

Q: 3. A solution is known to contain 42 mg/L of C6H₁2O6. Determine the theoretical oxygen demand.

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Q: .40. A solution is known to contain 50 g/m³ of CH3(CH₂),COOH and 42 g/m³ of NH3-N. Determine the…

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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.