半水没·全水没回転生物膜を持つバイオリアクターによる下·廃水の窒素除去に関する研究

摘要: This paper concerns the simultaneous nitrification and denitrification in a completely mixed bio-reactor with partially fully submerged rotating biological contactors. In mainly occur RBCs, respectively, organic material contained influent can be used as source of denitrification. An experimental investigation was made into effect species C/N ratio on denitrification.In first run where settled municipal wastewater fed reactor, efficiency about 80% 60% hydraulic retention time 6 hours summer, respectively. Similar obtained 13 to 17 winter. second run, diluted digester supernatant acetate or ethylene-glycol reactor. Influent NH4-N concentration 120 mg·l-1 set at desired level by changing ethylene-glycol. The water temperature were kept 25 25°C, highest nitrogen removal almost 90 % around 3 2 for ethylene-glycol,