40 persons Wastewater Treatment Equipment

40 persons Wastewater Treatment Equipment

1. 40 persons Wastewater Treatment Equipment Preface:

The 40 persons wastewater treatment equipment is applicable to treat the sewage from the toilets on ships to satisfy international standards for effluent discharge. The plant can be used for sterilizing gray water on ships as well.
The device adopts the principle of traditional aeration and contact oxidization biochemical treatment and chlorine disinfection, using activated sludge and soft stuffing medium. Due to the air pump stop and start occasionally, it can solve the nitration problem and overcome the sludge expansion caused by thread-like bacteria, which is also called "cancer" in traditional continuous aeration treatment plant.

2. 40 persons Wastewater Treatment Equipment Main Spare Parts:

(1) Air Pump

Air pump is used for transporting air to the plant. The plant is equipped with two kinds of air pump, they are main air pump and lifting air pump. They have the same structure but different functions. The main air pump is used to aerate to aeration tank and contact oxidation tank. The lifting air pump is used to lift the sludge in membrane tank and setting tank to aeration tank and to aerate to membrane tank.

(2) Cutting and Discharge Pump

Cutting and discharge pump is the open impeller centrifugal pump, the sewage is cut and macerated by cutting pump to recycle or discharge it to overboard at the emergency time. The sewage in all tanks can be discharged empty, so long as open the corresponding bottom valves.

(3) Selfpriming Pump

Self-priming pump is a centrifugal pump with stronger ability of self-suction, but it is better to keep some water in the pipes to avoid the problem for restarting. It can create a certain difference pressure and make the water permeate the membrane.

(4) Ultraviolet Ray Sterilizer

The disinfection principle of ultraviolet ray sterilization is to adopt appropriate length of UV wave to damage the molecular structure of the DNA or RNA of organism cell. It causes the deaths of growing cell and regenerative cells and makes content of coil form in effluent meet the requirement of discharge standard.

(5) Electric Control Box

The electric box is provided with the function of electric operation, protection and procedure control for the equipment.

3. Summary all the rules and effluent standards as followings:

	IMO old standard	IMO new standard	USCG	Alaska
TSS (mg/l)	50	35	150	30
BOD5 (mg/l)	50	25	NR (Not required)	30
COD (mg/l)	NR (Not required)	125	NR (Not required)	NR (Not required)
Coliform (pc/100ml)	250	100	200	20
PH	6~9	6~8.5	NR (Not required)	6~9
Chlorine (mg/l)	NR (Not required)	<0.5	NR (Not required)	10
Test days (day)	10	16	10	30

The equipment adopts activated sludge, contact oxidizing and principle of biologic membrane to digest the organic pollutant, which can treat sewage effectively and meet the IMO new effluent standard or other stricter requirements.

4. 40 persons Wastewater Treatment Equipment System Principle Drawing:

5. Several Class Certificates Supply:

ABS, BV, DNV.GL, LR, RINA, NK, USCG, and CCS class certificates.