Simplified Marine Sewage Treatment Plant

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Simplified Marine Sewage Treatment Plant

Introduction

Ship sewage comes from the daily drainage of the ship's personnel (crew and passengers), and the sewage can be divided into two types: black water and gray water according to the different water quality. Black water refers to fecal sewage with high pollutant content; gray water refers to less polluted wastewater such as bathing, kitchen, and laundry. Since the discharge cycle of the ship sanitary system is relatively short, the sewage is less decomposed than the urban drainage system, so the pollution load is higher. Moreover, the concentration of personnel makes the water quality and quantity of the drainage vary greatly, which puts forward higher requirements for sewage treatment. Marine Sewage Treatment Plant belongs to the key devices for prevention of pollution form ships in seas and oceans according to the revised Annex IV of the International Convention of the Prevention of Pollution (MARPOL 73/78).

Principle of Simplified Marine Sewage Treatment Plant

The apparatus and process using biological treatment, electric flocculation and membrane separation technology as well as UV disinfection technology. Through reasonable arrangement process, combined with enhanced flocculation and biochemical treatment to overcome the inherent shortcomings of the existing membrane bioreactor, and stably remove the effects of nitrogen and phosphorus, enhance the activity of sludge and prevent membrane from fouling. The process is breakthrough.

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 settling tank to aeration tank and to aerate to membrane tank.

2.Crushing 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.Vacuum Pump

Vacuum 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. If the membrane is blocked for pollution and not suction smoothly, the discharge capacity will come down,and cause the equipment to alarm at high level.

4.UV

The disinfection principle of ultraviolet ray sterilization is to adopt appropriate length of UV wave to damage the molecular structure of the DNA (desoxyribonucleic acid) or RNA (ribonucleic acid) of organism cell. It causes the deaths of growing cell and (or) regenerative cells and makes content of coli form in effluent meet the requirement of discharge standard. Its main element is lamp pipe to take care.

5.Electro Flocculation Reactor

Electric flocculation reactor in addition to redox reactions in biochemical treatment after further degradation of organics in water, but also the coagulation effect, enhance the settling performance of sewage, removal of phosphorus in the waste water and colloid, improve the working environment of MBR film. Reactor with aluminum blocks generally 1 to 1 and a half that need to be replaced, please use the special attention.

6.Electric Control Box

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

Main Data

Drawing

Common Troubles and Solutions