| 摘要 |
A basic material (17), preferably ammonia, is injected into the stream of soot water leaving the gasification reactor (10) prior to being processed in a filtration-type soot removal unit (28). The elevated pH of the soot water causes more metals to remain in the filter cake. Thus, the metals content of the grey water is reduced. More grey water can then be recycled back to the gasification reactor (10), with less grey water being handled by the wastewater treatment unit (34).
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