反硝化-短程硝化-厌氧氨氧化工艺处理晚期垃圾渗滤液的脱氮除碳性能

Treatment of Old Landfill Leachate via a Denitrification-Partial Nitritation-ANAMMOX Process

本研究在一体式分区反应器中接种成熟的厌氧氨氧化污泥和亚硝化污泥,通过与反硝化反应器串联,研究了前置反硝化与短程硝化-厌氧氨氧化串联工艺处理晚期垃圾渗滤液的脱氮除碳性能.结果表明,未串联反硝化之前,短程硝化-厌氧氨氧化反应器在进水氨氮浓度为600 mg·L^(-1),COD浓度<483 mg·L^(-1)时,总氮去除速率(NRR)可达1.88 kg·(m3·d)-1,总氮去除率(NRE)可达90.3%;而在进水COD浓度>483 mg·L^(-1),即C/N>0.8时,短程硝化-厌氧氨氧化反应器的NRR下降至1.50 kg·(m3·d)-1.通过前置反硝化反应器可以迅速缓解有机物对厌氧氨氧化的不利影响;反硝化与短程硝化-厌氧氨氧化串联反应器在进水NH+4-N浓度为1 100 mg·L^(-1),COD浓度1 150 mg·L^(-1)时,仍可稳定高效运行,整体NRR可达1.37kg·(m3·d)-1,厌氧区NRRana高达15.6 kg·(m3·d)-1,平均NRE可达98.6%,在仅利用原水中有机碳源的情况下实现了垃圾渗滤液的高效深度脱氮.此工艺晚期处理垃圾渗滤液可去除大部分易生物降解有机物.

To research the performance of removing nitrogen and organics from old landfill leachate via denitrification-partial nitritation-ANAMMOX （DN-PN-ANAMMOX） process, an integrated reactor seeded with mature ANAMMOX sludge and nitritation sludge connected to a denitrification （DN） reactor was studied. The result showed that before the pre-denitrification reactor was connected, the PN-ANAMMOX reactor achieved a nitrogen removal rate （NRR） of 1.88 kg. （m3· d） -1 and a nitrogen removal efficiency （NRE） of 90.3% when the concentration of influent ammonia nitrogen and COD were 600 mg·L-1 and 483mg·L-1, respectively. The NRR of the PN-ANAMMOX process dropped to 1.50 kg·（ m3 ·d） - 1 when the concentration of influent COD 〉 483mg·L-1 , which corresponds to C/N 〉0.8. To relieve the influence of organic matter on ANAMMOX, a DN reactor was put in front of the PN-ANAMMOX reactor. The DN-PN-ANAMMOX process achieved an NRR and NRE of 1.37 kg. （m3 ·d） -1 and 98.6% , respectively, under the conditions of influent ammonia nitrogen and COD concentrations of 1100 mg·L-1 and 1150mg·L-1, respectively. The NRR of ANAMMOX reached 15.6 kg·（m3 ·d） -1 The whole system realized a highly efficient and deep removal of nitrogen without any additional carbon source. When treating old landfill leaehate, most of the biodegradable organics can be removed by the system.