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1-6. Įn a biological waste treatment system, solids may enter (b) Solids decay in the reactor at a rate equal to kaX, in the influent, be created or destroyed by biological equal to VL/QL) necessary to reduce the concen- amount of time that water resides in the reactor, where ka is the decay rate constant. Write a mass growth or decay, and may leave in the effluent. Con- tration of substrate to 3 mg DOC/L in a complete balance on VSS and compute the value of kd. sider a waste treatment plant treating 1 m3/s of influent containing 55 mg/L of degradable organic solids. The wastewater also contains 180 mg/L of die solved organic carbon (DOC), which For every gram of dissolved organic matter that is degraded, the overall reaction converts a portion of the material into CO2 and H2O, and another portion into 0.4 g of new biomass. Analytically, this biomass and the degradable solids in the influent are both quantified as volatile suspended solids (VSS); that is, the degradable solids in the influent and the new biomass that grows in the reactor are indistinguishable from one another. may be degraded. (a) In a particular system, the dissolved organic matter (i.e., the substrate, S) is removed from solution at an overall rate (including both the conversion into CO2 and into Is = -k,S-X/(S² + K,), where X is the VSS con- centration in the reactor. The values of k1, K, and X in the reactor of interest are &8 mg DOC/mg VS d, 110 (mg DOC/L)², and 120 mg VSS/L, respec- tively. Write a mass balance and compute ue hydraulic detention time, t (i.e., the average new cells) given by mix reactor operating at steady state.

1-6. Įn a biological waste treatment system, solids may enter (b) Solids decay in the reactor at a rate equal to kaX, in the influent, be created or destroyed by biological equal to VL/QL) necessary to reduce the concen- amount of time that water resides in the reactor, where ka is the decay rate constant. Write a mass growth or decay, and may leave in the effluent. Con- tration of substrate to 3 mg DOC/L in a complete balance on VSS and compute the value of kd. sider a waste treatment plant treating 1 m3/s of influent containing 55 mg/L of degradable organic solids. The wastewater also contains 180 mg/L of die solved organic carbon (DOC), which For every gram of dissolved organic matter that is degraded, the overall reaction converts a portion of the material into CO2 and H2O, and another portion into 0.4 g of new biomass. Analytically, this biomass and the degradable solids in the influent are both quantified as volatile suspended solids (VSS); that is, the degradable solids in the influent and the new biomass that grows in the reactor are indistinguishable from one another. may be degraded. (a) In a particular system, the dissolved organic matter (i.e., the substrate, S) is removed from solution at an overall rate (including both the conversion into CO2 and into Is = -k,S-X/(S² + K,), where X is the VSS con- centration in the reactor. The values of k1, K, and X in the reactor of interest are &8 mg DOC/mg VS d, 110 (mg DOC/L)², and 120 mg VSS/L, respec- tively. Write a mass balance and compute ue hydraulic detention time, t (i.e., the average new cells) given by mix reactor operating at steady state.

Solid Waste Engineering
Solid Waste Engineering
3rd Edition
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Worrell, William A.
Chapter6: Biological Processes
Section: Chapter Questions
Problem 6.9P: Estimate the production of CO2 and CH4 during the anaerobic decomposition of ethanol. C2H6O.
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total 1-6. In a biological waste treatment system, solids may enter (b) Solids decay in the reactor at a rate equal to kaX, in the influent, be created or destroyed by biological inorganic carbon (TIC), and state concentrations of these species. tration of substrate to 3 mg DOC/L in a complete where ka is the decay rate constant. Write a mass equal to VL/QL) necessary to reduce the concen- balance on VSS and compute the value of kå. (b) How much biomass is created per liter of influent? compute the steady- growth or decay, and may leave in the effluent. Con- ncentrating low solids much less sider a waste treatment plant treating 1 m³/s of o influent containing 55 mg/L of degradable organic solids. The wastewater also contains 180 mg/L of die solved organic carbon (DOC), which For every gram of dissolved organic matter that is degraded, the overall reaction converts a portion of the material into CO2 and H2O, and another portion into 0.4 g of new biomass. Analytically, this biomass and the degradable solids in the influent are both quantified as volatile suspended solids (VSS); that is, the degradable solids in the influent and the new biomass that grows in the reactor are indistinguishable from one another. an Cin. A nt plant is 1 has an ed solids, may be degraded. da waste e that no reactor. nat is the che waste 2. 5x 10°-L охудen L. In the п propor- use it ata (a) In a particular system, the dissolved organic matter (i.e., the substrate, S) is removed from solution at an overall rate (including both the conversion into CO2 and into ha ра ar new cells) given by cen is dis- degree of * - DO), 1. Write ef = -k¡S³X/(S² + K3), where X is the VSS con- centration in the reactor. The values of k1, K, and X in the reactor of interest are 8 mg DOC/mg VSS d, 110 (mg DOC/L)², and 120 mg VSS/L, respec- tively. Write a mass balance and compute the hydraulic detention time, t (i.e., the average amount of time that water resides in the reactor, r's flo mi ins find the alr co tw am water 16 mg/L cha at a rate are tant than asporting nd, 75% med by mix reactor operating at steady state. Ch cro rate que ther to a
Transcribed Image Text:total 1-6. In a biological waste treatment system, solids may enter (b) Solids decay in the reactor at a rate equal to kaX, in the influent, be created or destroyed by biological inorganic carbon (TIC), and state concentrations of these species. tration of substrate to 3 mg DOC/L in a complete where ka is the decay rate constant. Write a mass equal to VL/QL) necessary to reduce the concen- balance on VSS and compute the value of kå. (b) How much biomass is created per liter of influent? compute the steady- growth or decay, and may leave in the effluent. Con- ncentrating low solids much less sider a waste treatment plant treating 1 m³/s of o influent containing 55 mg/L of degradable organic solids. The wastewater also contains 180 mg/L of die solved organic carbon (DOC), which For every gram of dissolved organic matter that is degraded, the overall reaction converts a portion of the material into CO2 and H2O, and another portion into 0.4 g of new biomass. Analytically, this biomass and the degradable solids in the influent are both quantified as volatile suspended solids (VSS); that is, the degradable solids in the influent and the new biomass that grows in the reactor are indistinguishable from one another. an Cin. A nt plant is 1 has an ed solids, may be degraded. da waste e that no reactor. nat is the che waste 2. 5x 10°-L охудen L. In the п propor- use it ata (a) In a particular system, the dissolved organic matter (i.e., the substrate, S) is removed from solution at an overall rate (including both the conversion into CO2 and into ha ра ar new cells) given by cen is dis- degree of * - DO), 1. Write ef = -k¡S³X/(S² + K3), where X is the VSS con- centration in the reactor. The values of k1, K, and X in the reactor of interest are 8 mg DOC/mg VSS d, 110 (mg DOC/L)², and 120 mg VSS/L, respec- tively. Write a mass balance and compute the hydraulic detention time, t (i.e., the average amount of time that water resides in the reactor, r's flo mi ins find the alr co tw am water 16 mg/L cha at a rate are tant than asporting nd, 75% med by mix reactor operating at steady state. Ch cro rate que ther to a
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