Waste oil: 3 secondary recycling technologies
Waste oil is a mineral or synthetic product, contaminated and unfit for further use. Every day thousands of liters of oil come into disrepair, requiring recycling. Impaired with impurities product comes from both ordinary consumers, such as car owners, and from auto repair shops, production shops, power plants.
Waste oil: what is the danger?
Contaminated motor or industrial oils belong to the 2 and 3 class of danger. In addition to petroleum components, such substances contain resins, mechanical impurities, asphaltenes and many other additives that are dangerous for the environment in general. Getting into the soil and ponds, waste oil pollutes natural resources, and also adversely affects the reproductive functions of living organisms.
Technologies of oil processing: physics + chemistry
Recycling of the waste oil cleans it. Purified oil is used for a second time and is added to fresh oils. Refining technologies have been in operation for only the last 40 years: the product was previously disposed by incineration to generate energy. Utilization of oil is economically unprofitable, but cleaning allows one to obtain from 1.6 liters of unsuitable product an average 1 liter of new lubricant.
Depending on the degree of contamination and the nature of impurities, one of the following processing technologies is used:
· Physical methods: washing, filtration, distillation, evaporation, centrifugal cleaning, etc .;
· Physicochemical processing of oil: adsorption, coagulation, selective dissolution of impurities and others;
· Chemical methods: introduction of reagents into waste oil and neutralization of impurities by chemical interaction. As the reagent sulfuric acid, hydrogen, metallic sodium are used.
In order for oil processing and purification to be effective, plants with combined technologies are used. The combination of physical, chemical and physicochemical methods in the treatment plant makes the process of processing universal for all types of oils and greases. The economic efficiency of such utilization of oils is high, but the costs of preliminary preparation – collection, storage, transportation – are significant. That is why, along with recycling, incineration or illegal dumping of waste are still used.
How to deal with used oil?
Technical oils are widely used as lubricants and fillers for motors, and are also widely used in industry. Huge amounts of oil contaminated with additives and harmful impurities, become unsuitable to use. What to do and where to put waste oil?
Disposal of oil at home. If it is a question of several liters of dirty inefficient product, drained from the engine of the car – oil utilization is possible even at home. Here are some ways of its useful application:
application on the outdoor wooden products (fences, boxes, benches) before staining in order to protect them from rotting;
usage as a technical lubricant in the car;
lubrication of the power tool if the instruction does not prohibit this;
impregnation of the sleepers, etc.
Industrial technologies of oil processing.
When it comes to large volumes, more serious waste oil processing will be required. It should be handed over to reception points, from which later the oil will go for heating or cleaning.
The oil purification station goes through the physical, physico-chemical or chemical processing, the final product of which is an absolutely pure oil, identical to the new one.
If oil processing is not held immediately, take care of its safe storage:
choose tanks or containers without holes, cracks and rust;
always sign containers with used oil or grease;
keep containers away from precipitation;
use oil tanks several times;
at the first opportunity, take the product for disposal;
organize your own cleaning station for oil processing, pre-issuing a license.
What is better not to do with used oil?
In no case it is worth to drain the waste oil into the soil, the nearest pond, to the road or to the sewer. Through the earth and other natural resources, all harmful substances, one way or another, will enter the human body, causing irreparable harm to health.
Do not mix already contaminated oil with other technical fluids (antifreeze, thinner). After that, it will not be possible to clean the mixture even under industrial conditions.
When storing the waste product, do not use dirty tanks, especially after dangerous cleaning agents. Bleaches or solvents will further contaminate the oil, and subsequent cleaning will be ineffective.