Ys. Choi et al., BIOLOGICAL PHOSPHORUS REMOVAL FROM WASTE-WATER IN A SINGLE REACTOR COMBINING ANAEROBIC AND AEROBIC CONDITIONS, Water science and technology, 34(1-2), 1996, pp. 179-186
Citations number
11
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
In this investigation, phosphorus removal experiment was conducted in
a single reactor combining anaerobic and aerobic conditions. Attempts
have been made to delineate phosphorus and organic removal mechanisms
and to evaluate the removal efficiencies with different internal recyc
le ratios, N/P ratios and varying SRT conditions. The removal efficien
cies of TOC, BOD and COD were observed to be higher than 95%, 90% and
90% in all runs, respectively. It is Further estimated that the optima
l operational conditions for phosphorus removal are observed when the
aerobic internal recycle rate is 100% with the inlet height 0.2H. The
percent removal efficiencies were 92% for T-P and 90% for PO4-P. While
, large differences in the removal of phosphorus with N/P ratios were
observed; at influent TKN/T-P of 2.5, 3.6 and 5.1 removal efficiencies
for T-P were 89%, 68% and 56%, respectively. Those removal efficienci
es decreased as the N/P ratios increase in wastewater. In case of SRT,
high removal efficiencies are observed with the solids retention time
of 10 days rather than with SRT's of 5 or 20 days. These results indi
cate this new process, KNCR (Kist Nutrient Removal Compact Reactor), t
o be an excellent means of reducing phosphorus emmissions into the env
ironment. Copyright (C) 1996 IAWQ.