025-85283059
210003
025-85283059
210003
江南,美国EPA启动短程反硝化（PnDN)-Anammox的Full-scale示范项目
时间：2024-01-09
焦点提醒：美国EPA启动短程反硝化（PnDN)-Anammox的Full-scale示范项目 
课题具体方针是经由过程提高厌氧氨氧化细菌(Anammox)在支流系统中的亚硝酸盐操纵率，为快速去除氮进程的周全利用摊平道路。
基在部门反硝化(PDN)线路，不是经由过程洗出NOB（亚硝酸盐氧化细菌）的手艺路径（保守短程硝化路径），而是经由过程PnDN进程将可能供给更靠得住的亚硝酸盐来历，PnDN-Anammox手艺线路多是更有益在出产标准上加快自养脱氮的实行和推动。
Deion:
Nutrient management and removal technologies currently in use at point sources, such as wastewater treatment plants, are mainly biological (for nitrogen (N) and phosphorus (P) removal) or a combination of biological and chemical (for P removal) processes that have been used since the early 1970s. ����APPIn recent years, research has been focused on alternative N removal strategies that can reduce capital, chemical, and energy costs. Mainstream shortcut N removal and mainstream deammonification processes represent a paradigm shift for the industry, offering the opportunity for sustainable N removal, energy neutral or even energy positive facilities and dramatic reductions in treatment costs, which has widespread environmental benefits in reducing the formation of HABs. But full-scale implementation has met with limited success.
Objective:
The specific objective of this project is to pave the way for full-scale applications of shortcut N removal processes, by increasing nitrite availability for anaerobic ammonium oxidizing bacteria (anammox) in mainstream systems. Shortcut N removal systems developed based on the partial denitrification (PdN) route rather than the NOB (nitrite oxidizing bacteria) out-selection route, will likely provide more reliable nitrite production and could accelerate full-scale implementation of shortcut N technologies.
Partial denitrification/anammox (PdNA) technologies span a range of readiness levels. The attached growth polishing PdNA concepts that will be explored further in this project have already been partially validated in pilot testing and full-scale treatment plants. HRSD transitioned their York River Treatment Plant post-dentification filters to PdNA almost two years ago, the first real full-scale example of mainstream anammox oxidizing a relevant amount of the influent ammonia load. Based on the successful outcome of piloting PdNA in a polishing moving bed biofilm reactor (MBBR) process, the pending full-scale nutrient upgrade for the HRSD James River plant will include this technology. This project will address remaining unknowns with designing and operating polishing PdNA processes.
Integrated PdNA applications, whereby anammox are incorporated into the main plant BNR process pre- or post-anoxic zones, have been validated conceptually in laboratory and pilot studies at DC Water and Columbia University, and this project will move these concepts rapidly to full-scale application. This project will also evaluate the integration of biological P removal with PdNA shortcut N removal.
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