ผลกระทบของตำแหน่งตัวกลางและอายุสลัดจ์ที่มีต่อการกำจัดไนโตรเจนทางชีวภาพของระบบแอกติเวเต็ดสลัดจ์ผสมผสานฟิล์มตรึง

Effects of media location and sludge age on biological nitrogen removal in integrated fixed film activated sludge (IFAS))

Name: นิภาวรรณ กลิ่นหอม

keyword: การกำจัดธาตุอาหารทางชีวภาพ

; ดีไนตรีฟิเคชั่น

; ไนตริฟิเคชั่น

Abstract: This objective of this research was to compare denitrification of the Integrated Fixed Film Activated Sludge (IFAS) wastewater treatment systems integrated with the fixed film media of Bioweb® in either anoxic or aerobic bioreactor. The experiments were conducted by using two pilotscale biological wastewater treatment systems called Anaerobic/Oxic (A/O) operated with the sludge ages of 9 and 6 days, respectively, and the hydraulic retention time (HRT) of 9 hours. The A/O systems with the fixed film media in the anoxic and aerobic zones were called IFAS 1 and IFAS 2, respectively. Both IFAS systems were fed with synthetic municipal wastewater containing the total organic matter concentration of 800 mg COD/L and total nitrogen concentration of 60 mg N/L The experimental results revealed that both IFAS systems could achieve the organic matters and ammonium nitrogen removal efficiencies of 95.2% and 100%, respectively. However, the nitrite accumulation was found in the IFAS 1 system because the growth rate of Nitrobacter spp. was limited at relatively high operating temperature of 28 ± 2 oC. In contrast, the IFAS with fixed film media installed in the aerobic tank could complete nitrification without the significant accumulation of nitrite nitrogen as a result of supplemented amount of Nitrobacter spp. in biofilm layer. The experimental results could also be concluded that the integration of fixed film media in the anoxic zone did not enhance the denitrification as compared to the IFAS system installed with the media in the aerobic zone. The biofilm layer provided the denitrification in the aerobic zone. When the sludge age was reduced to 6 days, both IFAS systems failed to achive the steady state conditons as a result of the growth of filamentous bacteria causing sludge bulking in the final clarifiers. However, the IFAS 2 system provided better nitrification than the IFAS 1, but could equally achive to remove the organic matters. In conclusion, the IFAS system with media installed in the aerobic reactor provided better performances than the IFAS system with fixed film media installed only in the anoxic zone.

มหาวิทยาลัยบูรพา. สำนักหอสมุด

Address: ชลบุรี

Email: buulibrary@buu.ac.th

Name: ธงชัย ศรีวิริยรัตน์

Role: อาจารย์ที่ปรึกษาหลัก

Created: 2559

Modified: 2565-08-02

Issued: 2559-07-29

วิทยานิพนธ์/Thesis

application/pdf

tha

DegreeName: วิทยาศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: วิทยาศาสตร์สิ่งแวดล้อม

Grantor: มหาวิทยาลัยบูรพา

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