Effect of pre-treatment with humic acids on the activity of nitrifying bacteria in activated sludge - Details

Author：

Liu, Jinjin (Liu, Jinjin.) | Yuan, Yue (Yuan, Yue.) | Li, Xiyao (Li, Xiyao.) | Xue, Zhaojun (Xue, Zhaojun.) | Peng, Yongzhen (Peng, Yongzhen.) (Scholars：彭永臻)

Indexed by：

EI Scopus PKU CSCD

Abstract：

The　aim　of　the　present　study　was　to　investigate　the　effect　of　pre-treatment　with　humic　acids　on　the　activity　of　nitrifying　bacteria　(ammonia　oxidizing　bacteria　(AOB)　and　nitrite　oxidizing　bacteria　(NOB))　in　activated　sludge　processes.　Varied　concentration　of　HA　(0,　80,　160,　240　mg/L)　were　applied　to　pretreat　(24　h)　three　different　sludges,　including　complete　nitrification　activated　sludge　with　low/high　activity　(Sc1/Sc2),　and　the　partial　nitrification　activated　sludge　(Sp).　The　results　showed　that　the　nitrate　accumulation　rate　(RNA)　of　Sc1　increased　significantly　from　10.73　%　to　53.93%　after　pretreatment　with　80　mg/L　of　HA　(50　mg/gMLVSS),　simultaneously　the　ammonia　oxidation　rates　(RAO)　changed　insignificantly.　In　terms　of　Sc2,　neither　the　RAO　nor　the　RNA　changed　under　each　tested　condition.　For　Sp,　no　NO3--N　accumulation　was　observed　after　the　pretrement,　which　demonstrated　that　the　HA　pretreatment　did　not　destruct　its　partial　nitrification　performance.　In　conclusion,　HA　pretreatment　improved　the　activity　of　NOB　which　with　low　overall　nitrification　activity,　while　exhibited　insignificant　improvement　on　AOB　activity.　©　2017,　Editorial　Board　of　Journal　of　Harbin　Institute　of　Technology.　All　right　reserved.

Keyword：

Ammonia Activated sludge process Organic acids RNA Bacteria Nitrates Nitrification

Author Community：

[ 1 ] [Liu, Jinjin]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Yuan, Yue]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Li, Xiyao]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Xue, Zhaojun]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Peng, Yongzhen]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China

Reprint Author's Address：

彭永臻
[peng, yongzhen]national engineering laboratory for advanced municipal wastewater treatment and reuse technology, key laboratory of beijing for water quality science and water environment recovery engineering, beijing university of technology, beijing; 100124, china

Email：

pyz@bjut.edu.cn

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