[Partial nitrification of digested sludge liquor with low C/N and high-concentration ammonia].
The experimental system consisted of anoxic filter and aerobic suspended carrier biofilm reactor. The partial nitrification was achieved and maintained stably in the aerobic reactor under normal temperature (15-29 degrees C) and high DO (6-9 mg/L). The nitritation with 70%-80% nitrite accumulation efficiency was obtained when FA concentration was in the range of 1.0-10.3 mg/L by controlling influent ammonia loading rate (ALR), ratio of alkalinity and ammonia and HRT in the aerobic reactor. The effluent nitrite/ammonia ratio was about 1.25 when the average influent ammonia, influent ALR and influent ratio of alkalinity and ammonia were 315.80 mg/L, 0.43 kg/(m3 x d) and 5.25, respectively. So the effluent of partial nitrification process provided the influent substrate demand for the following ANAMMOX process. The integrative analysis indicated that the proper FA concentration was the main factor achieving the partial nitrification. The study developed a novel partial nitrification technology adapt to water characteristics of digested sludge liquor.
Zhang
Shu-Jun
SJ
Beijing Drainage Group Company Limited, Beijing 100038, China. lxzsj@tom.com
Ma
Fu-Guo
FG
Cao
Xiang-Sheng
XS
Gan
Yi-Ping
YP
Meng
Xue-Zheng
XZ
Zhou
Jun
J
Wang
Hong-Chen
HC
Peng
Yong-Zhen
YZ
D000332:Aerobiosis; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D002244:Carbon / Q000378:metabolism; D009573:Nitrites / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism*; D009930:Organic Chemicals / Q000737:chemistry / Q000378:metabolism; D010084:Oxidation-Reduction; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*
D009573:Nitrites; D009930:Organic Chemicals; D000644:Quaternary Ammonium Compounds; D012722:Sewage; D002244:Carbon; D009584:Nitrogen