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首页> 外文期刊>Journal of Residuals Science & Technology >Influence of Raw Sludge Quality on the Efficiency of Microaerobic Sulfide Removal during Anaerobic Digestion of Sewage Sludge
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Influence of Raw Sludge Quality on the Efficiency of Microaerobic Sulfide Removal during Anaerobic Digestion of Sewage Sludge

机译：污泥厌氧消化过程中原污泥质量对去除好氧脱硫效率的影响

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摘要

Biogas produced by anaerobic digestion of organic substances is often polluted by hydrogen sulfide (H_2S) when organic matter containing sulfur compounds is digested. Energy use of biogas is complicated by H_2S content and it must be removed. Microaeration has recently been proven as a relatively simple and highly efficient biological method for sulfide removal regarding anaerobic digestion of biosolids. Our experience with a long term operation of the microaerobic digester confirms feasibility of highly efficient H_2S removal (about 99 %). However, a reliable control for air dosing according to raw sludge quality is a necessary condition for high and stable efficiency for microaerobic H_2S removal. It was observed that H_2S concentration in biogas varied significantly even at stable concentrations of sulfur compounds in raw sludge. Results prove that concentration of H_2S is significantly influenced not only by occurrence of sulfur compounds but also by presence of metals capable of binding to insoluble sulfide. Fe~(3+) and Al~(3+), most commonly used phosphorus removal agents during wastewater treatment, have a completely different impact on distribution of sulfide compounds.
机译：厌氧消化有机物产生的沼气在消化含硫化合物的有机物时通常会被硫化氢（H_2S）污染。 H_2S含量使沼气的能源使用复杂化，必须将其清除。最近，关于厌氧消化生物固体，微曝气已被证明是一种相对简单，高效的去除硫化物的生物方法。我们对微氧消化池的长期运行经验证实了高效去除H_2S（约99％）的可行性。但是，根据原始污泥质量可靠地控制空气剂量是实现高效，稳定地去除微氧H_2S的必要条件。观察到，即使在原污泥中含硫化合物稳定的情况下，沼气中的H_2S浓度也有很大变化。结果证明，H_2S的浓度不仅受硫化合物的存在显着影响，而且还受到能够与不溶性硫化物结合的金属的影响。 Fe〜（3+）和Al〜（3+）是废水处理中最常用的除磷剂，它们对硫化物的分布具有完全不同的影响。

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