臺灣博碩士論文加值系統

摘 要
本研究之主要目的在測試修正型無氧/好氧生物處理系統在不同操作條件
下之碳、氮、磷處理效率,並利用生物體內磷分類方法、生物體內PHB分析
及肝醣分析,探討在不同操作條件下,生物除氮除磷之機制。
研究結果顯示, 修正型無氧/好氧處理系統在進流不同合成基質,
及不同氧化還原電位控制之下,對污水中總COD去除率能達90%以上,總凱氏
氮去除率可達95%以上,總氮去除率可維持在50%左右,但總磷去除率普遍不
高,僅約20%至30%。利用STS 方法探究各試程總磷處理不佳的原因,發現在
無氧槽中因脫硝作用的影響使核酸磷類(ATP)佔相當大之比例,因此造成釋
磷作用不佳,故總磷處理效率低落。此外,根據生物體內PHB分析結果,當進
流基質中富含醣類時,在本系統無氧槽中胞外碳源發酵轉化為醋酸之比例
相當低,亦因此使磷積蓄菌不易生長。
將本研究結果與其他系統比較發現,造成氮磷併同去除效率低落
的原因可能為水力停留時間太短,或脫硝與釋磷作用未分開進行,因此延長
水力停留時間,或更換生物膜擔體,使脫硝與釋磷作用分開,為以後可深入
研究之方向。

Abstract
The main purpose of this study was to investigate the
nutrient removal efficiency of Modified A/O System, and to
analyze the mechanisms of biological nitrogen and phosphorus
removal in this system by utilizing phosphorus fractionation
method(the STS Method)、PHB and glycogen analysis .
Experimental results indicated that, under different
influent substrates and ORP control conditions, the TCOD
removal efficiency of Modified A/O system achieved 90% and the
TKN removal efficiency also achieved 95%. However, the TN
removal efficiency could only maintain 50% and the TP removal
efficiency only remained 20~30% .The results verified that NOx-
N Loading in the anoxic tank influence the releasing of
phosphorus magnificently and it *s difficult to treat nitrogen
and phosphorus simultaneously
Using the STS Method, we found that the amount of
nucleic acid-P in anoxic tank rouse highly and this is due to
the production of ATP by denitrification. The magnificent ATP
would inhibit the polyphosphates breakdown reaction and thus
inhibited the phosphorus releasing, this diminished the
phosphorus treating ability of Modified A/O system.
In addition, the analysis of PHB in anoxic sludge show
that the fermentation of influent sugar-rich substrates poorly
appeared, this may be the results of denitrification and cause
the polyphosphates accumulating bacteria hardly to survive.
By analyzing the relationship of the difference of ORP
of two tanks and the phosphorus fraction absorption amount, we
found that the major species supporting biological phosphorus
removal were high molecular weight polyphosphates and protein-
P. The nucleic acid-P had negative effect on biological
phosphorus removal and was competitive to polyphosphates.
Comparing this system with other systems revealed by
literature, we found that the main factors causing poorly
nutrient removal efficiency were the shortness of HRT and the
failure of separation of phosphorus releasing and
denitrification. The further study of elongation of HRT and the
change of the microbe carrier materials in anoxic tank were
suggested.