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http://dx.doi.org/10.5762/KAIS.2012.13.7.3285

A Field Research on Mud Flat Remediation by Biological Treatments  

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)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.13, no.7, 2012 , pp. 3285-3294 More about this Journal
Abstract
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.
Keywords
Microbial Agent; $CaO_2$; Organic Compounds; Oxidation Reduction Potential; Nitrogen and Phosphorus Removal;
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