Experimental study on inactivation of ammonia-oxidizing bacteria by combined disinfection of chlorine and chlorine dioxide - Details

Author：

Yang, Yanling (Yang, Yanling.) (Scholars：杨艳玲) | Zhang, Min (Zhang, Min.) | Li, Xing (Li, Xing.) (Scholars：李星) | Xiang, Kun (Xiang, Kun.)

Indexed by：

EI Scopus PKU CSCD

Abstract：

AOB　inactivation　effect　were　studied　by　individual　and　combined　disinfection　of　chlorine　(NaClO)　and　chlorine　dioxide　(ClO2).　The　mathematical　method　of　Berenbaum　was　applied　to　analyze　the　properties　of　AOB　inactivation　by　combined　disinfection　of　NaClO　and　ClO2.　Disinfectant　reduction,　production　of　disinfection　by-products　(DBPs)　and　chlorite　production　were　investigated.　Results　show　that　there　exists　a　good　correlation　between　AOB　inactivation　rate　and　Ct　value　within　15　minutes　of　disinfection.　When　Ct　value　of　NaClO　and　ClO2　reached　up　to　10~15　mg·min/L　and　2~4　mg·min/L　respectively,　the　AOB　inactivation　rate　could　reach　to　4.98　logarithmic.　AOB　inactivation　by　ClO2　shows　the　advantage　with　low　dosage　and　rapid　action　compared　with　that　by　NaClO.　The　combined　disinfection　of　NaClO　and　ClO2　show　the　synergistic　inactivation.　The　inactivation　effect　to　AOB　is　highly　improved　with　slow　disinfectant　reduction　and　low　DBPs　production.　The　combined　disinfection　technique　of　NaClO　and　ClO2　can　be　regarded　as　an　effective　method　to　control　the　nitrification　in　the　water　transportation　and　distribution　pipes.

Keyword：

Chlorine compounds Bacteria Sodium compounds Ammonia Disinfection Chlorine Disinfectants

Author Community：

[ 1 ] [Yang, Yanling]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Zhang, Min]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Li, Xing]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Xiang, Kun]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China