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A Study on the Impacts of Paste Type Torrefied Wood Flour Coagulants on Water Ecosystem

반탄화목분 Paste상 응집제의 수생태계 미치는 영향에 관한 연구

  • YANG, Seung Min (Department of Biobased Materials, Chungnam National University) ;
  • LEE, Seok Eon (Industrial & Environment Business Team, FITI Testing & Research Institute) ;
  • PARK, Hae Keum (Department of Biobased Materials, Chungnam National University) ;
  • KANG, Seog Goo (Department of Biobased Materials, Chungnam National University)
  • Received : 2019.04.30
  • Accepted : 2019.10.28
  • Published : 2019.11.25

Abstract

Due to global warming and abnormal climate, the incidence and scale of green tracts in rivers and water intake dam are increasing every year. Therefore, in this study, developed eco friendly positively charged Torrefied Wood Flour(TWF) coagulant by reusing wood damaged by blight as a natural material. In order to evaluate the effect of coagulant on water ecosystem, green algae contaminated water was collected and TOC showed high removal rate of 86% ~ 92% under 1% and 5% TWF C-PAM treatment condition. The $NH_3-N$ showed 53% removal efficiency. The average pH of the polluted water was 7.9 in the case of hydrogen ion concentration, and the pH of the treated water was in the range of 6.5 ~ 7.7, It was found to be suitable for water quality standards. In ecotoxicity tests, all the results of the experiment showed that both the number of green algae and that of treated water were not affected by the survival of the daphnia. Therefore, as a result of the analyzing, developed paste type TWF coagulants is considered to be able to remove algae using natural resources.

Keywords

algal bloom;algal bloom remove efficiency;positively charged torrefied wood flour

Acknowledgement

Supported by : Choongnam University

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