The effects of signal molecules on the characteristics of ANAMMOX granules in high-loaded UASB reactors - 文章详情页

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摘要：

A　typical　setback　of　ANAMMOX　granules　was　their　flotation　when　the　reactor　was　run　at　high　loading　rates.　The　effects　of　Acylated　Homoserine　Lactones　(AHLs)　on　the　characteristics　of　ANAMMOX　granules　in　high-loaded　UASB　reactors　were　investigated.　The　results　showed　that　the　exogenous　addition　of　30mg/L　N-octanoyl-PL-homoserine　lactone　(C8-HSL)　had　long-term　effects　on　the　settleability　of　ANAMMOX　granules　and　was　able　to　control　the　sludge　floating　effectively.　At　the　beginning　of　the　experiment　(0~20d),　C8-HSL　was　added　to　the　reactor　R2.　While　compared　with　the　control　group　R1,　the　content　of　B-EPS　in　the　granular　sludge　in　R2was　decreased　by　15%　and　the　granular　sludge＇s　value　of　PN/PS　dropped　from　4.22　to　2.14　on　the　100th　day.　In　addition,　the　hydrophobicity　of　the　granular　sludge　in　R2　was　increased　by　26%　on　the　100th　day.　Therefore,　the　settleability　of　sludge　granules　in　R2　was　improved　significantly　(the　density　of　the　granules　was　increased　by　24%,　and　the　settling　velocity　of　the　granules　was　increased　by　90%).　During　the　100days,　no　obvious　granule　floatation　was　observed　in　R2.　On　the　100th　day,　the　NLR　was　12.9kg-TN/(m3•d)　and　the　NRR　was　up　to　11.3kg-TN/(m3•d)　in　R2.　At　the　same　time,　the　nitrogen　removal　efficiency　was　up　to　88%　in　R2.　C6-HSL　improved　the　activity　of　the　granular　sludge,　while　C12-HSL　had　no　effects　on　the　characteristics　of　the　granules　in　the　high-loaded　reactors.　©　2018,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.

关键词：

Esters Flotation Granular materials Granulation Molecules Nitrogen removal Wastewater treatment

作者机构：

[ 1 ] [Zhang, Jing]The College of Architecture and Civil Engineering, The Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Zhang, Lin-Hua]The College of Architecture and Civil Engineering, The Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Jiang, Dong-Dong]Guangdong Shaogang Engineering Technology Co Ltd, Shaoguan; 512123, China
[ 4 ] [Li, Jun]The College of Architecture and Civil Engineering, The Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Li, Yun]The College of Architecture and Civil Engineering, The Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Zhang, Yan-Zhuo]The College of Architecture and Civil Engineering, The Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China

通讯作者信息：

[li, jun]the college of architecture and civil engineering, the key laboratory of beijing for water quality science and water environment recovery engineering, beijing university of technology, beijing; 100124, china

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