“老龄”垃圾渗滤液的厌氧毒性试验研究

Anaerobic Toxicity Assay of "Aged" Landfill Leachate

本文通过厌氧毒性试验(ATA),研究"老龄"垃圾渗滤液对厌氧微生物的毒性抑制作用。试验结果表明,渗滤液的厌氧毒性随着其体积浓度的增加而增强,当渗滤液浓度达80%时,污泥产甲烷活性开始出现中度抑制,而100%渗滤液能够使污泥相对活性下降55.5个百分点,最大产甲烷活性区间滞后14d。渗滤液对污泥的抑制类型是多种毒物共同作用的结果,在低浓度主要表现为代谢毒素,高浓度时表现出生理毒素作用。

The toxicity inhibition of the ＂aged＂ landfill leachate on anaerobic sludge was studied by Anaerbic Toxicity Assay（ ATA ）. The results show that anaerobic toxicity of leachate increased with the leachate concentration, to 80% leachate could produce moderate inhibition on the activity of methanogenic formation of anaerobic sludge, while its concentration reach to 100% leachate made the activity dropped by 55.5 percent and the period of most biogas production time delayed for 14 d. The inhibition of leachate on anaerobic sludge was the result reacted by kinds of toxicants, and the inhibition type of leachate was metabolic poison at low concentration and physiological poison at high concentration.