大众科技
大衆科技
대음과기
DAZHONG KEJI
2014年
6期
81-84
,共4页
SBR法%亚硝化%影响因素%最佳条件
SBR法%亞硝化%影響因素%最佳條件
SBR법%아초화%영향인소%최가조건
SBR%nitrosation%influence factors%optimum operating condition
利用SBR亚硝化处理化肥厂实际废水，研究其短程生物脱氮过程中pH、溶解氧、进水氨氮负荷和温度等因素影响，并确定亚硝化处理的最佳操作条件。结果表明，pH过低会抑制亚硝酸盐的生成，过高则不利于反硝化菌反硝化过程TN的去除；当pH值控制在8.0左右时，亚硝化率保持较高水平，同时出水TN浓度控制较好。当DO浓度为0.2～0.3 mg/L时，亚硝化反应继续进行,但NH4+-N亚硝化反应速率较慢；当DO浓度为1.5～2.8 mg/l时，无法实现系统中亚硝化的运行，硝化作用成为主要反应。高氨氮负荷进水有利于亚硝酸盐的积累，但对出水氨氮去除效果不佳。较高的温度有利于亚硝化反应进行。当t=35℃，初始pH控制在7.8～8.2，DO控制在0.5～0.6mg/L，进水浓度NH4+-N为100mg/L时，SBR亚硝化操作过程为最佳，此时亚硝化率基本稳定在90%以上。
利用SBR亞硝化處理化肥廠實際廢水，研究其短程生物脫氮過程中pH、溶解氧、進水氨氮負荷和溫度等因素影響，併確定亞硝化處理的最佳操作條件。結果錶明，pH過低會抑製亞硝痠鹽的生成，過高則不利于反硝化菌反硝化過程TN的去除；噹pH值控製在8.0左右時，亞硝化率保持較高水平，同時齣水TN濃度控製較好。噹DO濃度為0.2～0.3 mg/L時，亞硝化反應繼續進行,但NH4+-N亞硝化反應速率較慢；噹DO濃度為1.5～2.8 mg/l時，無法實現繫統中亞硝化的運行，硝化作用成為主要反應。高氨氮負荷進水有利于亞硝痠鹽的積纍，但對齣水氨氮去除效果不佳。較高的溫度有利于亞硝化反應進行。噹t=35℃，初始pH控製在7.8～8.2，DO控製在0.5～0.6mg/L，進水濃度NH4+-N為100mg/L時，SBR亞硝化操作過程為最佳，此時亞硝化率基本穩定在90%以上。
이용SBR아초화처이화비엄실제폐수，연구기단정생물탈담과정중pH、용해양、진수안담부하화온도등인소영향，병학정아초화처리적최가조작조건。결과표명，pH과저회억제아초산염적생성，과고칙불리우반초화균반초화과정TN적거제；당pH치공제재8.0좌우시，아초화솔보지교고수평，동시출수TN농도공제교호。당DO농도위0.2～0.3 mg/L시，아초화반응계속진행,단NH4+-N아초화반응속솔교만；당DO농도위1.5～2.8 mg/l시，무법실현계통중아초화적운행，초화작용성위주요반응。고안담부하진수유리우아초산염적적루，단대출수안담거제효과불가。교고적온도유리우아초화반응진행。당t=35℃，초시pH공제재7.8～8.2，DO공제재0.5～0.6mg/L，진수농도NH4+-N위100mg/L시，SBR아초화조작과정위최가，차시아초화솔기본은정재90%이상。
A lab-scale batch sequencing reactor (SBR) was used to treat ammonia-nitrogen wastewater of fertilizer plant and factors affecting the short-cut biological nitrogen removal, such as pH, DO, effluent of NH4+-N and temperature etc., were investigated. The optimum operating condition of nitrosation by SBR was confirmed. It reveals that pH value over low restrained generation of nitrite when pH value over high prejudiced the removal of TN through denitrification by denitrificans. Nitrosation rate remained high level and effluent of TN was well controlled as the pH value was approximately maintained 8.0. When DO was 0.2~0.3 mg/L, the reaction rate of nitrosation was slow as the partial nitrification was still going on. The nitrosation in system couldn’t achieved and nitrification became maim reaction while DO was 1.5~2.8 mg/l. Nitrite was abundantly accumulated at high ammonia nitrogen load from inflow while the removal efficiency of NH4+-N was not good. High nitrosation rate can be obtained at relatively high temperature. The optimum operating conditions were controlled as follows: temperature at 35℃, pH of initial inflow at 7.8 to 8.2, DO at 0.5 to 0.6 mg/L and influent concentration of NH4+-N at 100mg/L. The nitrosation rate can be retained above 90%in optimum operating conditions.
