铁锈及Fe(OH)3处理硫酸盐废水厌氧方法试验

投加铁锈或Ｆｅ（ＯＨ）３可明显改善含高浓度硫酸盐有机废水的厌氧处理能力，使趋于失败的升流式厌氧污泥床ＵＡＳＢ恢复正常工作对ＳＯ４２－为５０００ｍｇ／Ｌ，ＣＯＤＣｒ为１５０００ｍｇ／Ｌ的合成脂肪酸废水，在水力停留时间为４ｄ，由４０％以下的ＣＯＤ去除率提高到投加铁锈或Ｆｅ（ＯＨ）３后的７３％和８２％，出口ｐＨ值由５３上升到７３，产甲烷气量由０.３Ｌ／ｄ上升为２２Ｌ／ｄ.并提出了Ｆｅ（ＯＨ）３比铁锈在去除Ｓ２－干扰更有效，去除Ｓ２-干扰可使厌氧处理恢复正常

Treatment of sulphate containing wastewater by iron rust or ferric hydroxide

It had been found in this study that the addition of iron rust or Fe(OH)3 improved remarkebly the performance ofUASB in treating organic wastewater containing SO42- of high concentration. For a synthetic aliphatic acid wastewatercontaining SO4-2(5000mg/L) and CODcr (15000mg/L),at HTR of 4d,the COD removal efficency was increased to 73% or82% under 40% by the addition of iron rust or Fe(OH)3 respectively,while the effluent pH raised from 5.3 to 7.3 and themethane gas production increased from 0.3L/d to 2.2L/d.It was also put forward that Fe(OH)3 was more efficient to eliminate S2- than iron rust,and anaerobic treatment would recover to be normal after removal of S2-.