Marine Sewage Treatment System

The marine sewage treatment system is a key equipment under Annex IV of the International Convention for the Prevention of Pollution from Ships (MARPOL 73/78).

This system device can be used to treat domestic sewage on ships that is flushed with fresh water or seawater. It ensures that the indexes of the treated discharged water meet the discharge standard of IMO.MEPC.227(64) and the standard of Type II device in 33CFR159.

This device is a patented product with independent intellectual property rights for independent innovation. The SWCM multi-stage marine sewage treatment device utilizes the principles of activated sludge, contact oxidation and membrane bioreactor (MBR) to decompose organic pollutants. The membrane bioreactor can treat sewage efficiently, thoroughly and cleanly, enabling the discharged water to meet the new IMO standards and other more stringent requirements.

Overview

The process flow is as follows:

Main Technical Performance Table:

Model		SWCM(I)-
Model		15	20	25	30	40	50	60	80	100	120	150	200	250	300	400
Load	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 （men）		15	20	25	30	40	50	60	80	100	120	150	200	250	300	400
Max capacity（men）		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
External dimension （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
Weight	Dry weight（kg）	1000	1000	1100	1200	1300	1450	1600	1850	2200	2300	2800	3000	3300	3700	4200
Weight	Wet weight（kg）	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

Major Accessories:

(1) Air Pumps

Air pumps are used to transport air to the device. The device is equipped with two types of air pumps, namely the main air pump and the lifting air pump. The main air pump is used for aerating the aeration tank and the contact oxidation tank, while the lifting air pump is used to lift the sludge in the membrane tank and the settling tank to the aeration tank and also for aerating the membrane tank.

(2) Cutting and Discharge Pumps

The cutting and discharge pumps are open impeller centrifugal pumps. Sewage is cut and crushed by the cutting pump so that it can be recycled or discharged overboard in emergency situations.

(3) Self-priming Pumps

The self-priming pump is a centrifugal pump with relatively strong self-priming ability. However, it is advisable to keep a certain amount of water in the pipes to avoid problems related to restarting. It can create a certain pressure difference to make water permeate through the membrane.

(4) Ultraviolet Sterilizers

The principle of ultraviolet sterilization is to adopt ultraviolet waves of appropriate wavelengths to damage the molecular structures of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) of biological cells, causing the death of growing cells and/or regenerative cells and making the content of coliform bacteria in the effluent meet the requirements of the discharge standard.

(5) Electric Control Boxes

The electric control boxes have the functions of electrical operation, protection and program control for the equipment.

Principle diagram:

Related products for "Marine Sewage Treatment System"