[Nitritation-denitrification process as a pretreatment of ANAMMOX to remove nitrogen from piggery wastewater].
Piggery wastewater with low C/N was treated by using nitritation-denitrification process to attain a suitable influent for ANAMMOX at ambient temperature (13-20 degrees C) without pH control. By using this process, part of total nitrogen and COD were removed, the ratio of ammonium and nitrite reached around 1:1 and the pH was about 7.8, which were favorable for ANAMMOX. The average removal percentage of COD and total nitrogen were 64.3% and 49.1%, respectively. Afterwards, nitrogen removal performance by followed ANAMMOX process was also investigated. Stable performance of ANAMMOX process was achieved and the removal percentage of ammonium, nitrite and total nitrogen were 91.8%, 99.3% and 84.1%, respectively.
Wang
Huan
H
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China. wanghuan_cib@163.com
Li
Xu-dong
XD
Zeng
Kang-mei
KM
D000693:Anaerobiosis; D000822:Animal Husbandry; D000818:Animals; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D009573:Nitrites / Q000302:isolation & purification / Q000378:metabolism; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism*; D010084:Oxidation-Reduction; D000644:Quaternary Ammonium Compounds / Q000302:isolation & purification / Q000378:metabolism*; D013552:Swine; D014865:Waste Disposal, Fluid / Q000379:methods*
D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D009584:Nitrogen