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http://dx.doi.org/10.17137/korrae.2018.26.3.5

Effects of Membrane Filtration Concentrate of Sewage Reuse Facility on Performance of Bioreactor in Sewage Treatment Facility  

Lim, Ji-Young (Department of Civil & Environmental Engineering, Incheon National University)
Kim, Hyun-Sik (Department of Civil & Environmental Engineering, Incheon National University)
Bae, Min-Su (Environmental Corporation of Incheon)
Kim, Jin-Han (Department of Civil & Environmental Engineering, Incheon National University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.26, no.3, 2018 , pp. 5-14 More about this Journal
Abstract
This study investigated the effect of concentrate of membrane filtration of sewage reuse facilities on bioreactor's microorganisms in sewage treatment facility, and concentrate was analyzed, oxygen uptake rate and continuous activated sludge experiment were performed. As a results, the concentration of organic matter and TP concentration in concentrate was closely related to the concentration of SS and the concentration of ionic substances in concentrate was higher in order of $Cl^-$ > $Na^+$ > $Ca^{2+}$ > $K^+$ > $Mg^{2+}$ > $F^-$. And the analysis value of analytical items was greatly fluctuated according to sampling time of concentrate. Result of OUR test according to the mixing ratio of concentrate to sewage, it was found that the concentrate acts as an organic matter in the activated sludge microorganism and it increases with the increase of the concentrate mixing ratio. As a result of continuous activated sludge experiment, MLSS concentration, organic removal efficiency and TN removal efficiency gradually decreased with increasing concentrate mixing ratio. Based on the experimental results, expected mixing ratio of concentrate to affect the treatment efficiency of activated sludge is 25%.
Keywords
Concentrate; Microorganism; OUR(oxygen uptake rate); Activated sludge;
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