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Cd(II)对SBR生物除磷系统的影响实验研究
Experimental Study on the Effects of Cd(II) on SBR Biological Phosphorus Removal System
李师,王毅
作者单位:武汉启瑞药业有限公司,三川德青科技有限公司
中文关键字:SBR;生物除磷;Cd(II)
英文关键字:SBR;Biological Phosphorus Removal; Cd(II)
中文摘要:在确定SBR除磷标准时序的基础上,采用模拟生活污水探讨了不同浓度Cd(II)对SBR生物除磷系统的影响。结果表明,基于SBR除磷标准时序确定为瞬时进水→厌氧反应2h→好氧反应5h→沉淀1.5h→瞬时出水;在标准时序下,Cd(II)对总磷厌氧释磷和好氧摄磷的影响主要体现为Cd(II)对正磷酸盐去除的影响;Cd(II)浓度在10mg/L以下时,对SBR生物除磷系统的厌氧释磷和好氧摄磷表现为促进作用,而超过20mg/L则表现为抑制作用,且Cd(II)浓度越高,其抑制作用越强;Cd(II)浓度在40mg/L以下时,对SBR生物除磷系统COD的去除表现出促进作用,而超过40mg/L则表现出抑制作用。
英文摘要:Based on the determination of SBR phosphorus removal standard time sequence, the effects of different concentration of Cd(II) on SBR biological phosphorus removal system were studied by simulating domestic wastewater. The results showed that the SBR phosphorus removal standard time sequence was determined as instantaneous influent → anaerobic reaction 2h → aerobic reaction 5h → sedimentation 1.5 h → instantaneous effluent, and under the standard time sequence, the effects of Cd(II) on total phosphorus anaerobic release and aerobic uptake of phosphorus was mainly reflected by the effects of Cd(II) on orthophosphate removal. And when the concentration of Cd(II) was below 10 mg/L, the anaerobic phosphorus release and aerobic phosphorus uptake of SBR biological phosphorus removal system were promoted, but above 20 mg/L were inhibited and the inhibition would increase with the increase of the concentration of Cd(II). However, COD removal in SBR biological phosphorus removal system was promoted when the concentration of Cd(II) was below 40 mg/L , but COD removal was inhibited when the concentration of Cd(II) over 40 mg/L.
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