Analyses on water conservation and water consumption quota of optoelectronic device manufacture

Aim at water conservation of industry, investigation on water consumption quota of optoelectronic device manufacture was implemented. The investigation showed that there wasn´t any national standard of industrial standard on water consumption quota, even local standard. So it is a blank on water consumption to direct the water conservation for optoelectronic device manufacture industry. This made an powerful driving force for researchers to do enough investigation to give a reasonable quota to guide the water use in optoelectronic device manufacture industry. Investigations show that main consumption of water in an optoelectronic device manufacture industry are raw water of ultrapure water produce and flush water used during the optoelectronic device manufacturing, which lead that waste water from reverse osmosis and device flushing become two important aspects of the value of water consumption quota. The value of water consumption in an enterprise of optoelectronic device manufacture may reduce in way of innovations of manufacturing process, application of equipments of water conservation type and carrying out of manage measures. According to the investigation for typical enterprise of optoelectronic device manufacture, by way of illustrative case method, the water consumption quota of optoelectronic device manufacture industry was calculated and recommended to be in two types, i.e. 0.34 m³ per unit product and 335 m³ per million Yuan output value.