本项目题目“When a Detour Becomes a Shortcut: Going Full-scale with Partial Denitrification/Anammox as an Alternative Strategy for Mainstream Deammonification and Incorporating Biological Phosphorus Removal”,Project Amount 999,670;项目实施周期是2020年9月至2023年8月31号,3周年时间。
$ x# e5 f6 s1 n/ r6 ~6 [* g }. ^& f* Q# _, Y c( n, l! A. r3 i
课题具体目标是通过提高厌氧氨氧化细菌(Anammox)在主流系统中的亚硝酸盐利用率,为快速去除氮过程的全面应用铺平道路。 6 Y1 S) O' w# l6 q3 D+ ~3 ^2 V
2 S8 @5 H7 ~% S; Z$ e: |' R# a
基于部分反硝化(PDN)路线,不是通过洗出NOB(亚硝酸盐氧化细菌)的技术路径(传统短程硝化路径),而是通过PnDN过程将可能提供更可靠的亚硝酸盐来源,PnDN-Anammox技术路线可能是更有利于生产尺度上加速自养脱氮的实施和推进。4 k9 f% [$ N Z5 P
5 Q' X7 b* g: B" l, ^) y
# U( b. m1 w4 f. C0 h! ~
9 \5 w8 ^! S7 U$ c+ S
3 o+ I( \) j7 }2 b" e
Description:, Q' H7 ?' k2 x/ Q3 e& J
7 K( A ]. [4 g- I
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. In 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. 9 b( A( w) d% r: {: V* b
) S. T8 j0 x3 }% s# uObjective: & w; q' H0 X% C, R6 w& Q
0 o6 y& ?- B ^" A7 X5 E
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. 3 L; d5 W! V- k6 M. O" U
% {# @0 Y0 n9 Y
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.
! q1 b, Y# f, p8 H
* i2 Z. r) c# o9 R8 zIntegrated 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.$ O# J# r6 d$ ^1 ]4 k- A
* Y" f' o' o, e1 m8 K |
© 声明:本文仅表作者或发布者个人观点,与环保之家[2TECH.CN]无关。其原创性及陈述文字、内容、数据及图片均未经证实,对本文及其全部或部分内容、图片、文字的真实性、完整性、及时性本站不作任何保证或承诺,仅做参考并自行核实。如有侵权,请联系我们处理,在此深表歉意。
|