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Research on improvement of water purification efficiency by porous concrete using bio-film
Journal of Environmental Impact Assessment
Abbr :
J EIA
2011, 20(6), pp.815-821
Publisher : Korean Society Of Environmental Impact Assessment
Research Area : Environmental Engineering
2011, 20(6), pp.815-821
Publisher : Korean Society Of Environmental Impact Assessment
Research Area : Environmental Engineering
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This study aims to estimate the biological decomposition capacity of MPC(Microorganism Porous-Concrete). MPC has specific surface area formed by inside pores, and bio compound was added to those pores to reduce pollutants loading. To evaluate the water purification capacity of MPC, we carried out the comparative studies using different media types [GPC(General Porous-concrete), CPC(Compound porous-concrete), LPC(Lightweight aggregate porous-concrete)] under the condition of CFSTR, and different retention times (30, 60and 120 min). We also estimated the purification capacity of MPC under different concentrations of pollutant loadings. The MPC showed higher efficiency in water purification function than other conventional porous concretes with efficient decrease rates of SS, BOD,COD, and nutrient concentrations. In the comparison experiment for different retention times,MPC showed the highest removal efficiency for all tested pollutants in the longest retention time(120 min). In the long period test, the removal efficiencies of MPC concrete were high until 100 days after the set up of the operation, but began to decrease. Outflow flux was invariable compared with inflow flux so that extra detention time for media fouling such as back washing is not needed. But the results suggested that appropriate management is necessary for longterm operation of MPC. As the final outcome, MPC using bio organisms is considered to be efficient for stream water purification when they used as substrates for artificial river structure.
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