For the medium sand system of the low ammonia nitrogen, by shortening HLC, the removal effect of the system is significantly improved.

对中砂的中低氨氮进水系统，通过缩短水力负荷周期，会使去除效果得到明显改善。

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The proposal for the incinerator was made by Portugese-based firm HLC, but has faced fierce criticism from local people on health grounds.

BBC: Incinerator decision delayed by council