The environmental quality declined rapidly around one certain Guizhou coal preparation plant, coal dressing wastewater and washing gangue of the factory damage to entironment.
贵州某选煤厂所处工业区环境质量状况不断恶化，该厂外排的煤泥水和选煤废弃物洗矸石对当地生态环境造成了危害。
Proved by experimentation and practice, integrative method is the best suited technology in disposing coal gas washing wastewater.
试验与实践证明，煤气洗涤废水的最适宜处理工艺为综合法处理工艺。
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