焦化废水厌氧氨氧化生物脱氮的研究

采用厌氧氨氧化(ANAMMOX)工艺处理焦化废水,在厌氧34℃、pH值7.5~8.5,HRT为33h的条件下,经过115d成功启动厌氧氨氧化反应器.当进水NH4+-N、NO2--N浓度分别为80、90mg/L左右时, TN负荷可达160mg/(L·d),系统NH4+-N和NO2--N的去除率最高分别达86%和98%,TN去除率可达75%. GC-MS分析结果表明,酚类是焦化废水中较易被生物利用的有机物,ANAMMOX过程对好氧短程硝化工艺出水残余低浓度酚类有机物有进一步去除作用.

Anaerobic ammonium oxidation(ANAMMOX)for biological ntrogen removal from coking wastewater

Anaerobic ammonium oxidation (ANAMMOX) for the biological treatment of coking wastewater was investigated. An ANAMMOX reactor was successfully started up after 115d, at 34℃ and pH 7.5~8.5, with a hydraulic retention time (HRT) of 33h. The volume loading of total nitrogen (TN) up to 160 mg/(L·d) was obtained with 80 mg/L NH4+-N and 90 mg/L NO2--N in the influent. The maximum removal of TN, ammonia nitrogen and nitrite nitrogen reached 75%, 86% and 98%, respectively. The organic composition of influent and effluent of ANAMMOX reactor was investigated with GC-MS measurement, and the results showed that phenols were of easily-biodegraded organics in coking wastewater and low-concentration phenols from shortcut nitrification process could be removed in ANAMMOX reactor.