I. BACKGROUND INFORMATION
The status quo can not be optimistic about China's water resources!
     China is a serious drought and water shortage. The total amount of fresh water resources 2.8 trillion cubic meters, accounting for 6% of global water resources, second only to Brazil, Russia and Canada, ranking fourth in the world; but only 2200 cubic meters per capita, the world average of only 1 / 4 United States 1 / 5, in the world, ranked 121, is the world's 13 most water-poor individuals are one of the countries. Scarce water resources is only one aspect of the issue of water pollution situation is even more shocking!
According to monitoring of groundwater in most cities across the country by a certain degree of spot-and surface-like pollution, and the trend year-on-year increase. Increasingly serious problem of water pollution not only reduces the use of water features, has further exacerbated the shortage of water resources of China is implementing the strategy of sustainable development has brought a serious impact, but also a serious threat to the safety of drinking water to urban residents and the people health.
 
Second, it is not easy to detect sources of compressed air condensate
Compressed air condensate is a source of pollution can not easily be detected, air compressor system to produce the condensate component of the pollutants are mainly oil and solid carbon impurities (pipeline corrosion or impurities in the air pollution).
In China, except for a very small amount of oil-free air compressor lubricant used, the vast majority of models used lubricating oil. In oil lubrication system, compressed air and lubricating oil directly in touch with each other, into the compressed air, usually a mixture of petrol and water through the compressor and the separation of the three-tier filtration system, oil and condensate system Air emissions. To the screw compressor 40HP running 6000 hours per year as an example, the air compressor system oil volume of the annual emissions of about 3.59 gallons / year, while tens of thousands of national emissions from air compressor condensate is amazing the amount of pollutants if not treated will result in direct discharge of the heavily polluted.
Third, the oil pollution and emissions requirements
1 liter of oil condensate can cause much pollution?
Pollution or to 1.000.000 (!) Surface
Means: A family of three used to live 14 years!
Germany on the wastewater discharge requirements:
n the need for indirect emissions from industrial wastewater permit
n oil condensate must be processed
n Oil-free condensate will be lower than the emission standards, such as:
l the use of lubrication oil-free compressed air compressor production
l the use of non-mineral oil lubricants
n the need for some authority authorized
n the region to meet the emission standards
In Europe, oil condensate is to be the directory in accordance with the Waste Disposal (EuropeanWasteCode 130802) to deal with the pollutants harmless. By an authorized waste disposal companies to deal with recovery after the reunification.
l permission to use the collection of cans
l must be used within the treated stone pipe
 
In situ processing
l under the "General technical procedures" to minimize contaminants in
l of harmful substances, such as: oil, heavy metals and corrosive materials, advanced technologies must be used to deal with and will never allow a simple dilution
l emission standards applicable to all regions
Such as: hydrocarbon content must be below 20 mg / l.
l unauthorized emissions of harmful pollutants will be held criminally responsible!
Third, treatment
     Compressed air condensate oil processing methodology is generally divided into two categories:
1, gravity / adsorption separation: that is, relying on gravity, will be separated from the water droplets, and then use the special adsorption of residual oil adsorption filter, this approach is simple, low maintenance, no need for power, but only to deal with non-emulsified state the condensate can not be separated from the emulsion stability.
2, Demulsifier separation: the separation of the use of demulsifiers and reliable performance, the principle is simple, suitable for compressed air system condensate emulsion state to deal with.
    In Europe, the United States, Japan and other developed countries, oil-water separators Compressed Air System Compressed Air System is required settings, according to the emission of air separation ability of different oil-water separator or emulsion separation station. Environmental protection departments of the Chinese government has begun to standardize the compressed air system condensate oil emissions, beginning in 2007 at the same time a substantial increase in the cost of sewage treatment, guide enterprises to control and reduce sewage discharges. At the same time, ISO14000 environmental management system in accordance with the requirements of the pollutants to be produced in a timely manner, in situ processing, to prevent them from mixing with other pollutants before processing. In China, a growing number of industrial enterprises have realized the danger of oil condensate and consciously added to the liquid condensate containing the ranks of purification, to assume more social responsibility.