A Field Research on Mud Flat Remediation by Biological Treatments

생물학적 처리에 따른 갯벌 복원을 위한 현장 적용성 연구

  • Cho, Dae-Chul (Department of Energy & Environmental Engineering, Soonchunhyang University) ;
  • Bae, Hwan-Jin (Department of Marine Environmental Engineering, Gyeongsang National University) ;
  • Kwon, Sung-Hyun (Department of Marine Environmental Engineering, Gyeongsang National University)
  • 조대철 (순천향대학교 에너지환경공학과) ;
  • 배환진 (경상대학교 해양과학대학 해양환경공학과 해양산업연구소) ;
  • 권성현 (경상대학교 해양과학대학 해양환경공학과 해양산업연구소)
  • Received : 2012.05.04
  • Accepted : 2012.07.12
  • Published : 2012.07.31


A field test on mud flat remediation was carried out in order to observe the effects of the treatments such as microbial dose and an oxygen releasing compound like $CaO_2$. The size of each treatment site was $100m^2$ and the dosage was 3.6 kg per site. The 6 week monitoring showed that pH on two sites was below 7 and ORP increased from .178~-188 mV to .121~-142 mV. In Ignition loss and COD there were no significant changes. Meanwhile nitrogen and phosphorus concentrations changed: ammonia concentration decreased both on control and treatment sites. Nitrate nitrogen decreased more on combined treatment site than on single microbial treatment (11.3% vs. 7.3%) probably because the extra oxygen supplied by $CaO_2$ formed more oxic environment so that the facilitated nitrification might produce more nitrate but the nitrate would be much rapidly released into the water layer out of the sediment. That also explains the total nitrogen reduction(6.1%). Similarly, T-P and $PO_4-P$ reduced by 29% and 31.8%, respectively on combined treatment sites, resulting from the phosphorus release effect though the initial concentrations of the two factors were considerably high.


Microbial Agent;$CaO_2$;Organic Compounds;Oxidation Reduction Potential;Nitrogen and Phosphorus Removal


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