การพัฒนาแบบจำลองทางคณิตศาสตร์เพื่อใช้ในการควบคุมถังปฏิกรณ์ ไร้อากาศแบบลูกผสมเพื่อบำบัดน้ำทิ้งจากโรงแป้ง

Model Development for Controlling of Anaerobic Hybrid Reactor Treating of Carbonydrogenous Wastewater

Name: จักรพงศ์ นังคลา

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Abstract: A dynamic mathematical model was developed for a hybrid reactor. This model had been developed by Bussayajarn, 1999. The previous model predicted the variable of the process performance incorrectly. Therefore, this study improved the model by considering sulfate-reducing bacteria and hydrolysis pathways. The reactor was represented by 7 CSTRs in series with 88 ordinary differential equations. The model was verified by comparing the simulation results with the laboratory data from the Biogas Technology Research Group of KMUTT. The available data for the model validation were total volatile acid, COD (chemical oxygen demand), reactor pH and methane gas production rate, at organic loading rate 2 and 3 kgc0~/m3-day with hydraulic retention time 9.25 and 6.17 day, respectively. This developed model showed the better prediction in the process variables of reactor performance Moreover, this developed model was improved to be used to control the process using pH as a control parameter. The control model was run at organic overloading rate of 5 kg ~~~/m~-da~. pH in effluent stream was controlled to be not less than 6.8 with the on-off control system. The selected control strategies to test the model were as follows: a) recycle of effluent stream, b) base addition of NaOH, a strong base, and c) base addition of NaHC03, weak base and a buffer. The model provided reasonable prediction of the distinction of each control strategy. The recycle of effluent strategy could maintain the dropping rate of pH. For the NaOH addition, the response of pH was more fluctuated than that of NaHC03 addition. However, the pH resistance of NaOH addition was less than that of NaHC03 addition.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี. สำนักหอสมุด

Address: กรุงเทพมหานคร

Email: info.lib@mail.kmutt.ac.th

Name: Pawinee Chaiprasert

Role: Advisor

Name: Annop Nopharatana

Role: Advisor

Created: 2542

Issued: 2006-12-25

Modified: 2555-04-10

วิทยานิพนธ์/Thesis

ISBN: 9746247832

CallNumber: CHE961

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DegreeName: วิศวกรรมศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: วิศวกรรมเคมี

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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