CAJ | 학술논문

采用延长边沟闷曝时间的方法对BOD降解模式T型氧化沟进行提高脱氮效率的改造.结果表明,边沟闷曝时间由0.5 h增至1 h,系统反硝化和硝化运行时间比t_(DN)/t_N由0.56调整至0.50时,提高了系统的NH_3-N的硝化效率,强化了脱氮能力.工艺改造后出水NH_3-N浓度由改造前15.5 mg/L显著降低至10.4 mg/L,达到了广东省地方标准(DB 44/26-2001)第一时段的二级排放要求;系统脱氮效率由改造前52.1%显著提高到68.3%,有效地解决了污水厂出水NH_3-N浓度过高的问题;具有投资少、效果明显的特点,有一定的推广价值.
채용연장변구민폭시간적방법대BOD강해모식T형양화구진행제고탈담효솔적개조.결과표명,변구민폭시간유0.5 h증지1 h,계통반초화화초화운행시간비t_(DN)/t_N유0.56조정지0.50시,제고료계통적NH_3-N적초화효솔,강화료탈담능력.공예개조후출수NH_3-N농도유개조전15.5 mg/L현저강저지10.4 mg/L,체도료광동성지방표준(DB 44/26-2001)제일시단적이급배방요구;계통탈담효솔유개조전52.1%현저제고도68.3%,유효지해결료오수엄출수NH_3-N농도과고적문제;구유투자소、효과명현적특점,유일정적추엄개치.
Though prolonging aeration time in side ditches, the technical modification of T type oxidation ditches of BOD biodegraded mode in the aspect of denitrification enhancement was constructed. Results proved that, when aeration time in side ditches was increased from 0. 5 h to 1 h and radio of denitrification time to nitrification time, t_(DN)/t_N,was changed from 0.56 to 0. 50, percentage of nitrification was increased and ability of denitrification of the system was improved. After modification, concentration of NH_3-N of outlet, 10.4 mg/L, dramatically lower than before, 15.5 mg/L, met discharged standards of Guangdong Province ( DB 44/26-2001) , and denitrification efficiency was dramatically enhanced from 52. 1 % to 68. 3%. The problem of high concentration of NH_3-N of outlet in wastewater plants was solved. With low investment and high efficiencies, the modification has certain of value of popularization and application.