Since the 1990s, research on using the anaerobic ammonium oxidation (Anammox) technique to remove nitrogen from wastewater has been advancing quickly. Nitrite (NO2—N), acceptor of electron for anammox bacteria, must be present in the wastewater in order for the anammox procedure to be used widely. To achieve the optimum concentration of NO2—N and the potential for integration with anaerobic treatment processes, partial nitrification (P/N) is a critical step. Continuous aeration (Plan 1), nitrite dosing (Plan 2), and Anoxic intermittent aeration (Plan 3) modes were the three alternative techniques that were assessed. In Plan 1, Using synthetic feed, the P/N process’ starting was accomplished. (NH4 +-N concentration: 50 mg/L) to enrich 30 days of ammonium oxidising bacteria (AOB) with low dissolved oxygen (DO) of 0.1-1.0 mg/L. This was followed by the replacement of the synthetic feed with UASB (Up Flow Anaerobic sludge blanket) effluent (NH4+-N-50-65 mg/L; COD: 60–80 mg/L and NO3−N: 0–5 mg/L). As 100% nitrification was shown, strategy 1 was dominated by nitrite oxidising bacteria (NOB) activity. The study also explored the viability of nitrite dosage 30mg/L for 15d without feeding into the reactor with regular mixing in order to obtain the P/N. As the days went on, strategy 2’s granular sludge started to break down, which inhibited AOB and NOB activity. In order to enrich the AOB bacteria, the reactor was further run using strategy 3 feeding. The findings of this study show that the optimum choice for quickly inhibiting NOB bacteria in the seed sludge is a combination of strategies 1 and 2. This work suggests a perfect method for a rapid P/N startup with low DO concentration, producing enough NO2 to meet the necessary N concentration for the anammox process.

1.
Lackner
,
S.
,
Gilbert
,
E. M.
,
Vlaeminck
,
S. E.
,
Joss
,
A.
,
Horn
,
H.
, &
van Loosdrecht
,
M. C.
(
2014
).
Full-scale partial nitritation/anammox experiences–an application survey
.
Water research
,
55
,
292
303
.
2.
Ding
,
S.
,
Bao
,
P.
,
Wang
,
B.
,
Zhang
,
Q.
, &
Peng
,
Y.
(
2018
).
Long-term stable simultaneous partial nitrification, anammox and denitrification (SNAD) process treating real domestic sewage using suspended activated sludge
.
Chemical Engineering Journal
,
339
,
180
188
.
3.
Soliman
,
M.
, &
Eldyasti
,
A.
(
2016
).
Development of partial nitrification as a first step of nitrite shunt process in a Sequential Batch Reactor (SBR) using Ammonium Oxidizing Bacteria (AOB) controlled by mixing regime
.
Bioresource Technology
,
221
,
85
95
.
4.
Liu
,
W.
,
Yang
,
Q.
,
Ma
,
B.
,
Li
,
J.
,
Ma
,
L.
,
Wang
,
S.
, &
Peng
,
Y.
(
2017
).
Rapid achievement of nitritation using aerobic starvation
.
Environmental Science & Technology
,
51
(
7
),
4001
4008
.
5.
Chen
,
Z.
,
Wang
,
X.
,
Yang
,
Y.
,
Mirino
Jr.,
M. W.
&
Yuan
,
Y.
(
2016
).
Partial nitrification and denitrification of mature landfill leachate using a pilot-scale continuous activated sludge process at low dissolved oxygen
.
Bioresource technology
,
218
,
580
588
.
6.
Capodici
,
M.
,
Corsino
,
S. F.
,
Di Trapani
,
D.
, &
Viviani
,
G.
(
2019
).
Achievement of partial nitrification under different carbon-to-nitrogen ratio and ammonia loading rate for the co-treatment of landfill leachate with municipal wastewater
.
Biochemical Engineering Journal
,
149
,
107229
.
7.
Miao
,
Y.
,
Peng
,
Y.
,
Zhang
,
L.
,
Li
,
B.
,
Li
,
X.
,
Wu
,
L.
, &
Wang
,
S.
(
2018
).
Partial nitrification-anammox (PNA) treating sewage with intermittent aeration mode: effect of influent C/N ratios
.
Chemical Engineering Journal
,
334
,
664
672
.
8.
Khan
,
A. A.
,
Gaur
,
R. Z.
,
Tyagi
,
V. K.
,
Khursheed
,
A.
,
Lew
,
B.
,
Mehrotra
,
I.
, &
Kazmi
,
A. A.
(
2011
).
Sustainable options of post treatment of UASB effluent treating sewage: a review
.
Resources, Conservation and Recycling
,
55
(
12
),
1232
1251
.
9.
Lotti
,
T.
,
Kleerebezem
,
R.
,
Hu
,
Z.
,
Kartal
,
B.
,
Jetten
,
M. S. M.
, &
Van Loosdrecht
,
M. C. M.
(
2014
).
Simultaneous partial nitritation and anammox at low temperature with granular sludge
.
Water research
,
66
,
111
121
.
10.
Cui
,
H.
,
Zhang
,
L.
,
Zhang
,
Q.
,
Li
,
X.
, &
Peng
,
Y.
(
2019
).
Stable partial nitrification of domestic sewage achieved through activated sludge on exposure to nitrite
.
Bioresource technology
,
278
,
435
439
.
11.
De Cocker
,
P.
,
Bessiere
,
Y.
,
Hernandez-Raquet
,
G.
,
Dubos
,
S.
,
Mozo
,
I.
,
Gaval
,
G.
, … &
Sperandio
,
M.
(
2018
).
Enrichment and adaptation yield high anammox conversion rates under low temperatures
.
Bioresource technology
,
250
,
505
512
.
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