School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, Heilongjiang Province, China.
Water Sci Technol. 2010;61(12):2965-72. doi: 10.2166/wst.2010.259.
A novel system was used for nitrogen removal from reject water. This system includes one anoxic/oxic reactor for nitrification and a special reactor for denitrification in which primary sludge was added intermittently as electron donor. In denitrification reactor, sludge fermentation and denitrification reaction took place simultaneously and promoted each other. It was found that effluent recycle could improve nitrogen removal efficiency due to reclaiming of alkalinity. Under steady state conditions, the average solid retention time (SRT) in denitrification reactor was 12-15 d, a total nitrogen loading rate was 0.2 kg N/(m(3) day) and TN removal efficiency was more than 90% without extra carbon source addition. Primary sludge was degraded so that volatile suspended solid (VSS) decreased by 50%. Further investigation showed that ORP could be taken as a control parameter for sludge addition.
一种新型系统被用于从 reject water 中去除氮。该系统包括一个缺氧/好氧反应器用于硝化，以及一个特殊的反应器用于反硝化，其中间歇性地添加初沉污泥作为电子供体。在反硝化反应器中，污泥发酵和反硝化反应同时发生并相互促进。研究发现，由于回收到了碱度，出水循环可以提高脱氮效率。在稳定状态下，反硝化反应器中的平均固体停留时间（SRT）为 12-15 天，总氮负荷为 0.2 kg N/（m(3) day），无需额外添加碳源，TN 去除效率超过 90%。初沉污泥被降解，挥发性悬浮固体（VSS）减少了 50%。进一步的研究表明，ORP 可以作为污泥添加的控制参数。
