CAJ | 학술논문

针对餐厨垃圾水解酸化液作外加碳源的反硝化脱氮效果进行研究,考察了人工配水条件下水解酸化液反硝化处理的适宜 COD/NO3--N 比范围,在适宜COD/NO3--N 比条件下与甲醇、乙酸钠的反硝化效果进行对比,并验证了水解酸化液对于生活污水的反硝化效果.结果表明,人工配水条件下利用水解酸化液作碳源的适宜COD/NO3--N 比为4.9~6.0,反硝化速率最高可达25.0mg NO3--N/(gVSS·h).反应过程存在2个不同的硝态氮去除速率阶段,并出现了亚硝氮积累.餐厨垃圾水解酸化液为含多种VFA成分的混合物,其反应过程中硝态氮的去除速率比甲醇、乙酸钠等纯物质做碳源时的硝态氮去除速率快.将餐厨垃圾水解酸化液用于生活污水脱氮处理,当COD/NO3--N 比为6时,水中的硝态氮以及亚硝氮均能够得到较为彻底的去除.
침대찬주랄급수해산화액작외가탄원적반초화탈담효과진행연구,고찰료인공배수조건하수해산화액반초화처리적괄의 COD/NO3--N 비범위,재괄의COD/NO3--N 비조건하여갑순、을산납적반초화효과진행대비,병험증료수해산화액대우생활오수적반초화효과.결과표명,인공배수조건하이용수해산화액작탄원적괄의COD/NO3--N 비위4.9~6.0,반초화속솔최고가체25.0mg NO3--N/(gVSS·h).반응과정존재2개불동적초태담거제속솔계단,병출현료아초담적루.찬주랄급수해산화액위함다충VFA성분적혼합물,기반응과정중초태담적거제속솔비갑순、을산납등순물질주탄원시적초태담거제속솔쾌.장찬주랄급수해산화액용우생활오수탈담처리,당COD/NO3--N 비위6시,수중적초태담이급아초담균능구득도교위철저적거제.
Batch experiments were carried out to determine the effect of COD/NO3--N ratio on synthetic domestic wastewater denitrification using kitchen waste hydrolysis products as carbon source, and comparision was made between kitchen waste hydrolysis products, methanol and sodium acetate for the performance of denitrification at the optimum COD/NO3--N ratio respectively. Then, the effect of kitchen waste hydrolysis products on authentic domestic wastewater denitrification was proved. For each experiment with different COD/NO3--N ratio, the concentration of nitrate(NO3--N)、nitrite (NO2--N)、ammonia nitrogen (NH4+-N) and chemical oxygen demand (COD) were investigated. COD/NO3--N ratio ranging from 4.9 to 6.0 was suitable for domestic wastewater denitrification using the kitchen waste hydrolysis products as carbon source, and the highest denitrification rate was 25.0mg NO3--N/(gVSS?h). In the denitrification process, there were 2stages with different nitrate removal rate as well as obvious nitrite accumulation. The self-made kitchen waste hydrolysis products consisted of various VFAs, and the denitrification rate was higher for the kitchen waste hydrolysis products compared with pure substances such as methanol and sodium acetate. The utilization of kitchen waste hydrolysis products as carbon source for authentic wastewater denitrification was proved to be at the optimal situation when the COD/NO3--N ratio of 6was achieved. At the optimal situation, the removal of nitrate and nitrite was exhaustive.