Development of Influent Controlled Membrane Bioreactor for Biological Nutrient Removal on Municipal Wastewater

Abstract

This study was performed to investigate the characteristics of nutrient removal of municipal wastewater in membrane bioreactor system. Membrane bioreactor consists of four reactors such as two intermittently anaerobic tanks, the oxic tank and the sludge solubilizaion tank with an internal recycle. The hydraulic retention time (HRT) and flux were 6.5 hours and 20.4 L/m 2 ․hr (LMH), respectively. The removal efficiency of CODCr, SS, TN and TP were 94.0%, 99.3%, 99.9%, 69.9%, and 66.9%, respectively. The estimated true biomass yield, specific denitrification rate (SDNR), specific nitrification rate (SNR), specific phosphorus release rate (SPRR) and specific phosphorus uptake rate (SPUR) were 0.34 kgVSS/kgBOD․d, 0.067 mgNO3-N/mgVSS․d, 0.028 mgNH4-N/mgVSS․d, 16.0 mgP/gVSS․d and 2.1 mgP/gVSS․d, respectively. The contents of nitrogen and phosphorus of biomass were 8.9% and 3.5% on an average.

Municipal Wastewater Treatment and Microbial Diversity Analysis of Microalgal Mini Raceway Open Pond

“…특정한 환경하에서 C. vulgaris의 경우 건 조중량 대비 약 40%의 지질함량을, S. obliquus의 경우 약 43% 의 지질함량을 나타냈다는 보고가 있으며, Botryococcus braunii 는 약 86%의 지질함량을 나타냈다고 한다 (Mandal and Mallick, 2009). 하지만 B. braunii는 성장속도가 매우 느리기 때문에 바 이오디젤 생산 효율이 좋지 않아, 성장속도가 빠르면서 지질함 량이 높은 C. vulgaris와 S. obliquus와 같은 녹조류가 바이오디 젤 연구에 주목 받고 있다 (Scragg et al, 2003;Mandal and Mallick, 2009 (Carberry and Greene, 1992;Yun et al, 1997;Park et al, 2011)…”