Marine Sewage Treatment Plant

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.