Nitrogen Removal From Wastewater Using Immobilized Microorganisms

• Main Authors: CHENG, YU- JU, 鄭育如
• Other Authors: HSIA, TSUNG-HUI
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/66679243870864874982

碩士 === 東南科技大學 === 營建與空間設計系營建科技與防災碩士班 === 104 === In this study, combined partial nitrification and anaerobic ammonium oxidation processes can also effectively shortened the procedure of biological nitrogen removal, but reduced costs and complexity of the operation. Immobilized microorganisms embedded in matrix of carrier can protect the microorganisms, so microorganisms are more endurable to changes in environmental conditions, and solid-liquid separation is easy to avoid the loss of microbes. In this study, activated sludge was immobilized. Spending several months of time, the anammox bacteria and denitrifying bacteria can be acclimated.The immobilized anammox bacteria and denitrifying bacteria coexist in the same reaction tank. The effects of ammonium, nitrite, nitrate and dissolved oxygen in nitrogen removal in this single reactor were investigated with controlling the dissolved oxygen in solution in several batch experiments. It was demonstrated from the experimental results that the acclimated immobilized anammox bacteria and denitrifying bacteria can coexist in the same reaction tank. The optimal nitrogen removal efficiency was found with 2 days duration time of controlling DO for 100 mg/L of total nitrogen. For 130 mg/L of total nitrogen, the nitrogen removal efficiency was best with 3 days duration time of controlling DO. Therefore, dissolved oxygen affects the nitrogen removal efficiency. With the increasing of total nitrogen concentration, duration time of controlling dissolved oxygen also needs to be extended for raising nitrogen removal.