With the continuous development of the global shipping industry, the treatment of residual oil and sewage from ships is becoming increasingly prominent. These oily wastewater contain a large amount of harmful substances, and if not properly treated, it will cause serious pollution to the marine environment. Therefore, the reception and treatment of residual oil and sewage from ships has become an important issue that the shipping industry must face. This article will explore in detail the reception and treatment methods of ship residual oil wastewater, in order to provide useful references for protecting the marine environment.
1、 The sources and hazards of ship residual oil and sewage
The main source of residual oil wastewater from ships comes from oily wastewater generated during normal operation, including oily wastewater from machinery spaces, ballast water from oil tanks, and tank washing water. These oily wastewater contain harmful substances such as petroleum hydrocarbons and heavy metals. Once discharged into the sea, it will cause damage to the marine ecosystem, affect the growth and reproduction of marine organisms, and even threaten human health through the food chain.
2、 Methods for receiving residual oil and sewage from ships
The reception of residual oil and sewage from ships is usually carried out using specialized receiving equipment. These devices include oil and wastewater separators, oil and wastewater storage cabinets, etc. During the receiving process, it is necessary to first discharge the oily wastewater from the ship into the receiving equipment, and then separate the oil and water in the oily wastewater through physical or chemical methods. The separated oil can be recycled and reused, while the water can be treated to meet the emission standards.
3、 Treatment methods for ship residual oil and sewage
Physical treatment method: Remove suspended solids and oil from oily wastewater through physical means such as sedimentation and filtration. This method is simple and easy to implement, but the processing effect is limited, and it is usually used as a preprocessing method.
Chemical treatment method: using chemical reagents to react with harmful substances in oily wastewater, transforming them into harmless substances. This method has a good processing effect, but it may cause secondary pollution and needs to be used with caution.
Biological treatment method: Utilizing the metabolic action of microorganisms to degrade harmful substances in oily wastewater. This method is environmentally friendly and sustainable, but the treatment cycle is long and requires suitable biological environment and conditions.
4、 Measures to strengthen the reception and treatment of residual oil and sewage from ships
Establish strict emission standards: The government should establish strict standards for the discharge of residual oil and wastewater from ships, limit the concentration and amount of emissions, and ensure effective treatment of oil and wastewater.
Strengthen supervision and law enforcement: Relevant departments should strengthen the supervision of the reception and treatment of residual oil and sewage from ships, crack down on violations, and ensure that ships comply with relevant regulations.
Enhance the environmental awareness of crew members: Strengthen the training and education of crew members on environmental awareness, so that they fully understand the importance of ship residual oil and sewage treatment, and consciously abide by environmental regulations.
Promote advanced technology: Encourage the research and development and promotion of advanced ship residual oil and wastewater treatment technologies, improve treatment efficiency and effectiveness, and reduce treatment costs.
In summary, the reception and treatment of residual oil and sewage from ships is an important measure to protect the marine environment. By adopting appropriate receiving and processing methods, strengthening supervision and law enforcement, enhancing crew environmental awareness, and promoting advanced technologies, we can effectively reduce the pollution of ship residual oil and sewage to the marine environment, and contribute to the sustainable development of the shipping industry.
