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| Study on the Treatment Effect of Recycled Fibers Papermaking Wastewater Based on Non-metallic Mineral Powder |
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| DOI：10.11980/j.issn.0254-508X.2018.11.004 |
| Key Words:nonmetallic minerals wastepaper papermaking wastewater pollution load |
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| Abstract:The effects of different nonmetallic mineral powders and their compounds as waste water treatment agents on the removal rate of pollutants load in recycled fibers papermaking wastewater were studied. The initial quality conditions of the wastewater were as follows: CODCr6300 mg/L， suspended solids content（SS） 2065 mg/L， BOD5 2154 mg/L， turbidity 2229 NTU， chroma 500. The results showed that the synthetic calcium silicate and bentonite were effective for increasing the removal rates of SS， turbidity， the values were 81.3% and 73.7%， 71.7% and 65.6% respectively; the synthetic calcium silicate， zeolite， diatomite and sepiolite were effective for increasing the removal rates of chroma， the values were 90.0%， 75.0% and 75.0% respectively; the synthetic calcium silicate， attapulgite and diatomite were effective for increasing the removal rates of total nitrogen， the values were 76.3%， 72.9% and 69.9% respectively; the synthetic calcium silicate， zeolite and attapulgite were effective for increasing the removal rates of total phosphorus， the values were 80.2%， 85.6% and 88.3% respectively; the synthetic calcium silicate and diatomite were effective for increasing the removal rates of ammonia nitrogen， the values were 73.1% and 86.5% respectively. The compound powders in the experiment could effectively improve the removal rate of wastewater pollution load， especially the compound powder No.2 with synthetic calcium silicate as the main compound could improve the removal rate of CODCr in the wastewater more obviously， and the removal rate could reach 93.0%. |
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