改良交替式生物池出水NH_(3)-N随时间变化研究

Variation of Effluent Quality NH3-N with Time on Modified Alternating Biological Pond

针对改良型交替式生物池出水阶段NH_(3)-N逐步上升的现象,通过设置不同采样位置、采样深度研究其水质随时间的变化规律。研究表明,改良型交替式生物池在边池出水阶段,发生了明显的反硝化现象,前2 h内反硝化基本完成,且随着水深的增加反硝化现象越明显;发生反硝化的同时,活性污泥会释放NH_(3)-N,这是造成随着出水时间的延长NH_(3)-N浓度逐步上升的主要原因。

Aiming at the phenomenon of the gradual increase of NH_(3)-N in the effluent stage of the improved alternating biological pond,the variation of the water quality with time was studied by setting different sampling locations and sampling depths.It has shown that the improved alternating biological pond had obvious denitrification phenomenon in the effluent stage of the side pond.The denitrification was basically completed within the first 2 hours,and the denitrification phenomenon became more obvious with the increase of water depth.Sludge released NH_(3)-N,which was the main reason for the gradual increase of NH_(3)-N concentration with the extension of effluent time.