Marine Sewage Treatment Plant
1. Marine Sewage Treatment Plant Preface
The marine sewage treatment plant belongs to the key device for prevention of pollution form ships on seas and oceans, according to the revised Annex IV of the International Convention of the Prevention of Pollution (MARPOL 73/78). This plant is applicable to treat the sewage, which means human body wastes and the wastes from the toilets on vessels and which is also called "black water", to meet the effluent standard of IMO MEPC.159(55), and discharge the effluent overboard.
This plant is according to the resolution MEPC.159(55) enacted on 13rd Octomber 2006. The convention (MARPOL73/78) provides that all STPs installed on or ater 1st January 2010 should meet the resolution MEPC.159(55) and MEPC.227(64).
The plant also can be used in terrestrial sewage, besides in ship vessel and oil platform. The water quality after treatment can reach the national reuse water quality requirments. It is also applicable to treat the galley, shower drainage which is called "grey water" on condition that the "grey water" is pretreated and there should select a bigger capacity model to match with it.
This plant has obtained one item of Authorized Patent and one item of Paratical new patent, meanwhile has been obtained the Type Approval of CCS and IMP circular in April 2009, and it in February 2011 by Germanischer Lloyd (GL) type approval certificate MED made, while providing ABS, DNV, BV, RS and other classification societies certificate.
This plant is apply to install on the below vessels later 1st, January, 2016:
(1) All areas of the vessel (except passenger vessle);
(2) The passenger vessel beyond of the Annex IV of the International Convention of the Prevention of Pollution (MARPOL 73/78).
2. Marine Sewage Treatment Plant Notes
(1) The marine sewage treatment plant also can used to treat the anitary wastewater, seawater or freshwater.
(2) The test pressure of the tank is 0.021MPa.
(3) The effluent quality of the device is in compliance with the standards of IMO MEPC227 (64), and 33CFR159 for type II device.
3. Marine Sewage Treatment Plant Rules and Effluent Standards
|
IMO MEPC.159(55) |
IMO MEPC.227(64） |
USCG |
Alaska |
|
|
TSS (mg/l) |
35 |
≤35Qi/Qe |
150 |
30 |
|
BOD5 (mg/l) |
25 |
≤25Qi/Qe |
NR |
30 |
|
COD (mg/l) |
125 |
≤125Qi/Qe |
NR |
NR |
|
coliform (per 100ml) |
100 |
100 |
200 |
20 |
|
PH |
6~8.5 |
6~8.5 |
NR |
6~9 |
|
Residual chlorine (mg/l) |
＜0.5 |
＜0.5 |
NR |
10 |
|
Ammonia Nitrogen (mg/l) |
NR |
NR |
NR |
10 |
|
Total Nitrogen (mg/l) |
NR |
≤20Qi/Qe (or 70% scalage at least) |
NR |
NR |
|
Total Phosphorus (mg/l) |
NR |
≤1.0Qi/Qe (or 80% scalage at least) |
NR |
NR |
4. Marine Sewage Treatment Plant Models and Main Technical Parameters
Model
SWCM(I)-
15
20
25
30
40
50
60
80
100
120
150
200
250
300
400
Average load
(L/d)
1190
1540
1890
2310
3080
3780
4480
6020
7700
9100
11200
14700
18200
23100
30800
Peak load
(L/h)
149
193
237
289
385
473
560
753
963
1138
1400
1838
2275
2888
3850
Organic load
(kgBOD5/d)
0.595
0.77
0.945
1.155
1.54
1.89
2.24
3.01
3.85
4.55
5. 6
7.35
9.10
11.55
15.4
Rated Capacity
(persons)
15
20
25
30
40
50
60
80
100
120
150
200
250
300
400
Max capacity
(persons)
17
22
27
33
44
54
64
86
110
130
160
210
260
330
440
Electricity
AC 380V/50Hz/3φ, AC 415V/50Hz/3φ, AC 440,
60Hz/3φ, etc.
Power (kW)
2.5
2.5
2.5
2.5
3.0
3.0
3.5
4.0
4.0
4.0
6.0
6.0
7.0
9.0
11
Outline Size
(mm) L×W×H
1870
×
1200
×
1450
1680
×
1400
×
1570
1890
×
1400
×
1560
1980
×
1500
×
1650
2320
×
1600
×
1700
2320
×
1700
×
1880
2650
×
1700
×
1860
2800
×
1900
×
2090
2800
×
2100
×
2300
3030
×
2100
×
2300
3090
×
2250
×
2390
3640
×
2250
×
2390
3890
×
2450
×
2580
4790
×
2450
×
2600
5980
×
2450
×
2600
Dry weigh (kgs)
1000
1000
1100
1200
1300
1450
1600
1850
2200
2300
2800
3000
3300
3700
4200
Wet weight (kgs)
2283
2640
2740
3500
4400
5073
5270
6517
8268
9166
11340
13267
16538
20357
25417
Effluent standard
BOD5≤25 Qi/Qe mg/L, COD≤125Qi/Qe mg/L,
TSS≤35 Qi/Qe mg/L, coliform≤100/100ml, PH6～8.5, CL2≤0.5mg/L
5. Marine Sewage Treatment Plant System Principle Drawing
6. Marine Sewage Treatment Plant Severl Class Certificates Supply
ABS, BV, DNV, GL, LR, RINA, NK, USCG, and CCS class certificates.
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