| http://www.w3.org/ns/prov#value | - ate salt by treating the process wastewater to remove impurities and contaminants, including debris, oil/grease,...http://www.google.com/patents/US6001246?utm_source=gb-gplus-sharePatent US6001246 - Converting sulfuric acid based process wastewater generated in industry into sodium sulfate salt and clean water for reuse as process water by precipitation, adsorption, filtration, ultraviolet radiati
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