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Shortcut Nitrifictaon Denitrification Proecss Treating

Old Landfill Leachate Ammonia Nitrogen

LV Bin

School of Environment & Urban Construction

Wuhan Institute of Science and Technology

Wuhan, China

Email:binlv@126.com

WANG Hong-yu YANG Kai

Department of Municipal Engineering

Wuhan University

Wuhan, China

AbstractThe effects of dissolved oxygen concentration,temperature and other operation facters on shortcut nitrification

and denitrification process for the treatment of landfill leachate

was studied in a sequencing batch reactor. The results showed

that the termination of aeration could effectively control the

reaction at the phase of nitrite and could get stable removal rateof ammonia nitrogen and relatively high accumulation rate of

nitrite when dissolved oxygen concentration rapidly increased.

The increase of dissolved oxygen concentration and temperature

were propitious to the rise of volume loading in the process of

shortcut nitrification and denitrification. It is relatively

appropriate that the dissolved oxygen concentration and

temperature was respectively about 1.0mg/L and more than 25

in the process of shortcut nitrification and denitrification

process treating landfill leachate. When pH value was not

controlled in the reaction process and temperature ranged from

25 to 28 and the dissolved oxygen concentration of

nitrification was about 1.0mg/L and the ammonia nitrogen

loading was less than 0.25gNH4+-N/(L.d), the effluent

concentration of ammonia nitrogen and nitrite was respectivelyless than 15mg/L and 1mg/L and the removal rate of total

nitrogen more than 98 .

KeywordsLandfill Leachate; Shortcut Nitrifictaon Denitrification;accumulation rate of nitrite

I.

[1-3]

/

+

1mg/L

DO DO

II.

A. SBR

30 cm 38 cm 21 L

1

B.

750~1450 mg/LCOD 780~1420 mg/LBOD

65~120 mg/L pH 8.2 8.7

C. N-1-

COD

D. pH

277.5 24h

Project supported by Hubei Provincial Department of Education (No.Q20091710)

1

23

4

5 6 7

1

2

3

4

5

6

7 pH

1

978-1-4244-7739-5/10/$26.00 2010 IEEE

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+ 23h+ 1h

NaHC03

pH DO 2

DO 0.75mgL

2.4

pH 25d

10mg/L

98 7900 8100mg/L MLVSS/MLSS 0.78

III.

A. DO

DO

DO

DO

2

0

15

30

45

60

75

90

105

120

135

360

380

400

420

440

460

480

500

0 100 200 300 400 500 600 700 800 900

0

2

4

6

8

10

DO

mg/L

mg/L

mg/L

(mi n)

2

2 15mg/L

15mg/L

DO

DO

DO

DO

15mg/L

DO

DO

15mg/L

B. DO DO 0.75mg/L1.0mg/L

1.5mg/L

8000mg/L DO

15mg/L

1

1 DO

gNH4+ N/L.d

DO0.75mg/L

DO1.0mg/L

DO1.5mg/L

0.21 0.35 0.48 0.26

0.23 0.37 0.57 0.47

0.25 6.29 0.47 0.31

0.27 18.14 0.94 0.620.29 42.97 9.48 12.46

0.31 57.94 24.87 20.73 mg/L

1 DO

1.0mg/L 1.5mg/L

1mg/L DO

0.75mg/L 1.0mg/L 17

DO 1.5mg/L

DO 0.75mg/L 1.0mg/L

DO

DO 1.0mg/L

C. 272522 15

DO 1.0mg/L DO

DO

2

2

gNH4+ N/L.d

(mg/L)

27 25 22 15

0.21 0.48 0.36 9.64 57.49

0.23 0.57 0.84 29.50 97.02

0.25 0.47 0.59 71.83 177.59

0.27 0.94 10.45 96.40 216.2

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2 25

27

1mg/L 15 25

20

25

D. pH pH

pH

pH

pH

DO

12h DO

+ 11h 1h 25

28 DO 1.0 mg/L

7900 8200mg/L 3

800

900

1000

1100

1200

1300

1400

1500

82

84

86

88

90

92

94

96

98

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38

0.15

0.20

0.25

0.30

0.35

gNH4+N/L.

d

d

0

20

40

60

80

100

120

140

160

180

mg/L

mg/L

3 pH

3 pH

pH 6.9~8.437d

15mg/L

96

0.25gNH4+

N/ L.d

1mg/L 98

0.27gNH4

+N/L.d 0.30gNH4

+

N/L.d 70mg/L

160mg/L 94

88 0.25gNH4+

N/L.d

25 28 DO

1.0mg/LpH

15mg/L 1mg/L 98

IV.

1 DO 15mg/L

DO DO

2DO

DO 0.75mg/L 1.0mg/L

DO

25

25

3 pH 25

28 DO 1.0mg/L DO

0.25gNH4+

N/L.d

15mg/L 1mg/L

98

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