There is almost no activity in the industry that would not output oil-polluted waters, which are to be handled as hazardous wastes. Since the beginning of 2006 the so-called “oil-eater” equipment was developed in a joint effort with the MOD ED Co., then in mid-2007 the equipment was put into operation. During the development work a system has been achieved that eliminates the oil content of industrial waste waters on-site through an electro-chemical process. Dual benefit is attained through the application of the technology: on one hand the ecological impact of oily contaminants is eliminated, on the other hand water consumption of industrial sites can be significantly reduced by re-using the purified industrial water. Waste management costs can be cut down significantly this way.
The equipment is automated and is easy to put into operations. It does not need permanent operator attendance. The “oil-eater” is a flow-through type system made of corrosion resistant materials, except for the electrodes. The equipment design can be easily tailored to the various needs that can be met in the industries.
The equipment is capable of reducing the oil content of industrial waste waters to lower than 5 mg/liter level, which is currently the official emission limit in the EU. Simultaneously, the chemical oxygen demand and the floating particle content of the water is decreased, while the organic soluble extract content and the pH of the water can be set to the desired value. During the treatment, the hardness of technological waters usually drops to a normal level (post-process average is 15 German hardness degree), which brings the well-known advantages to all users and technologies.
Separation of the pollution
Pollution separated from water is collected in a tray located at the bottom of the equipment. The pollution is eliminated in form of an almost dry powder.
Application of the equipment significantly reduces clear-water consumption. While the cost of draining 1 cubic meter of waste water is around 145 US $ on today prices in Hungary, the same volume of water can be purified for 1.7 US $. Cleaning the water on-site eliminates transportation costs. Since about 85% of the purified water can be recycled considerable water and sewage fees can be saved, not to mention the compliance to environment regulations.
Application areas and industrial references
AUDI Hungarian Motor Ltd. (breaking of emulsions). Tata barracks of the Hungarian army (water cleaning at car wash stations). Waste water treatment in the oil industries. Remediation of polluted environments of oil storage tanks by removing oil containing leachate from the soil. Breaking of oil and water emulsions in general.
Patent registration number: P 0700232 (Hungarian patent, 03.20.2007).
The Downloads section contains additional material.