Study on Partial Nitrification Anaerobic Ammonium Oxidation(PN/A)Process Based on New PVA/PA/Fe Gel Carrier
Partial nitrification and Anammox(PN/A)is a low carbon and low consumption process for autotrophic nitrogen removal from wastewater.However,how to effectively intercept the slowly growing AnAOB in the reactor and create a symbi-otic habitat between AnAOB and AOB is the key to the stable operation of PN/A.In this study,iron loaded porous biological carrier PVA/PA/Fe is proposed to promote the interception of AnAOB and the symbiosis with AOB,so as to realize the rapid start-up and efficient operation of PN/A.The results showed that PVA/PA/Fe significantly promoted the retention of AnAOB and the co-symbiotic nitrogen removal with AOB,and the abundance of AnAOB increased by 5.93％in Anammox stage and 7.81％in PN/A stage compared with the control group.In the Anammox stage,the reactor with PVA/PA and PVA/PA/Fe carri-ers showed better impact load resistance,and the NLR could reach 1.01 kg-N/(m3·d),while the control group could only stabi-lize at 0.61 kg-N/(m3·d).The reactor with PVA/PA/Fe carrier reached RETN＞85％after 7 days of startup in PN/A phase,while the control group and the reactor with PVA/PA carrier reached this treatment effect after 12 days.The above results provide theoretical and technical guidance for the practical application of PN/A process.
PVA/PA/Fe gel carrierAnammoxPN/AironCandidatus_Kuenenia
万方数据
维普
