Biochemical Domestic Sewage Treatment Unit

1. General introduction

The Biochemical Domestic Sewage Treatment Unit has been examined and satisfactory tested in accordance with the International Maritime Organisation Resolution MEPC.159 (55) to meet the operational requirements referred to in regulation 9.1.1 of Annex IV of the International Convention for the Prevention of Pollution from Ships, 1973/1978.

2. Basic principle

The Biochemical Domestic Sewage Treatment Unit consists of 5 water tight tank bodies. These 5 tank bodies respectively aeration tank, 1st stage contact tank, 2nd stage contact tank, settlement tank and sterilization catchment tank etc.

3. Genaral Drawing

marine sewage treatment plant.jpg

4. Technical Parameters

Model			WCBx -10B	WCBx -15B	WCBx -20B	WCBx -25B	WCBx -30B	WCBx -40B	WCBx -50B	WCBx -60B	WCBx -80B	WCBx -100B	WCBx -150B	WCBx -200B	WCBx -300B	WCBx -400B	WCBx -500B	WCBx -600B
Capacity (person)			10	15	20	25	30	40	50	60	80	100	150	200	300	400	500	600
Treatment load (t/d)			0.70	1.05	1.40	1.75	2.10	2.80	3.50	4.20	5.60	7.0	10.5	14	21	28	35	42
Organic load (kg/d)			0.35	0.53	0.70	0.88	1.05	1.40	1.75	2.10	2.80	3.50	5.25	7.0	10.5	14	17.5	21
Drain standard			BOD5≤25mg/L；COD≤125mg/L；TSS≤35mg/L；
Process Pump	Model		32CGW-10-20											2CWF-11
	Type		Veryical type											Blade centrifugal type
	Capacity (m3/h)		10											20
	Power (Kw)		1.5											2.2
Air pump	Model		CYBW—10						CYBW—20					CYBW—40
	Type		Sliding vane type
	Displacement (m3/h)		10						20					40
	Pressure (KPa)		60
	Power (kw)		0.37						0.75					1.5
Crushing pump	Model		0.5CWF-10						1CWF-11					2CWF-11
	Type		Blade centrifugal type
		Displacement (m3/h)	5						10					20
		Power (Kw)	1.1						1.5					2.2
Ultrafilter		Model	CSUF–5060											CSUF–6050
		Type	Advanced anti-soil ultrafiltration membrane
		Flux (m3/h)	0.4-0.5											0.6-0.8
UV sterilizing plant		Model	DY-UV-GL-C						DY-UV-GL-D					DY-UV-GL-E
		Wavelength (nm)	253.7						253.7					253.7
		Power (Kw)	0.27						0.36					0.54
		Displacement (m3/h)	1.5						2.0					2.5
Back flushing water pressure			0.1～ 0.25MPa
Power supply			3ph/AC380/50Hz or 3ph/AC 440V/60Hz
Control mode			Automatic/manual