摘要
厌氧氨氧化反应由于其自养脱氮的特性,自被发现之日起就备受关注。作为一种能稳定为厌氧氨氧化反应提供亚硝态氮的技术,短程反硝化技术将硝酸盐仅还原为亚硝态氮,已经被认为是目前最节能的硝酸盐废水脱氮技术。针对一段式短程反硝化-厌氧氨氧化工艺实现电厂循环冷却水浓水与城市污水同步脱氮的可行性进行探究。在pH=9的条件下,经过26 d的驯化,成功启动在低pH下能稳定实现高亚硝积累的短程反硝化反应器。加入厌氧氨氧化污泥后,迅速启动一段式短程反硝化-厌氧氨氧化反应器。短程反硝化过程能利用的有机物主要来源于城市污水。因此,预计通过控制化学强化初沉的可以控制预处理过程有机物的去除量,从而控制进水的碳氮比实现稳定脱氮。采用短程反硝化-厌氧氨氧化技术可以在低物质输入,低能源消耗,低碳排放,低剩余污泥产生的前提下实现电厂循环冷却水浓水与城市污水的同步脱氮,是一种经济且环境友好的处理技术。
The anammox reaction has been a concern since the day it was discovered because of its autotrophic denitrification characteristics.As a technique stably to provide nitrous nitrogen for anammox reaction oxidation,the short-range denitrification technology will reduce the nitrate only to the nitrite nitrogen,and has been considered the most energy-efficient nitrate wastewater denitrification technology now.At aiming the one-part form short-range denitrification-anammox process,the feasibility of realizing the synchronous denitrification of concentrated power plant circulating cooling water and municipal wastewater is studied.After 26 d of domestication under the condition of pH=9,the short-range denitrification reactor that can achieve stable accumulation of high nitrite at low pH is successfully started.After adding anammox sludge,a one-part form short-range denitrification-anammox reactor is started promptly.The organic matter able to be used in the short-range denitrification process mainly originates from the municipal wastewater.Therefore,it is expected that the removal amount of organic matter in the pretreatment process can be controlled by controlling the initial precipitation of chemical enhancement so as to control the carbon-nitrogen ratio of the influent and to realize the stable denitrification.The short-range denitrification-anammox technology can achieve the synchronous denitrification of concentrated power plant circulating cooling water and municipal wastewater under the premise of the low material input,low energy consumption,low carbon emissions and low residual sludge production,which is an economical and environmentally friendly treatment technology.
出处
《城市道桥与防洪》
2024年第3期227-231,M0018,共6页
Urban Roads Bridges & Flood Control
关键词
电厂循环冷却水
短程反硝化-厌氧氨氧化
城市污水
化学强化初沉
power plant circulating cooling water
short-range denitrification-anammox
municipal wastewater
initial precipitation of chemical enhancement
