厌氧生物(wù)处理(lǐ)工艺的运行管理(lǐ)
作為(wèi)厌氧生物(wù)处理(lǐ)工艺的最后一篇,主要从厌氧生物(wù)处理(lǐ)装置的启动、运行管理(lǐ)指标和水质管理(lǐ)指标这三个方面来简单介绍一下厌氧生物(wù)处理(lǐ)工艺的运行与管理(lǐ)。
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在消化池进行正式投产运行之前,需要进行清水试验,用(yòng)以检查消化池本身是否存在漏水、漏气的问题;
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随后就可(kě)以向消化池中投放接种污泥,接种污泥通常来自于已经成功运行的消化池中的污泥,投放之前要采用(yòng)滤网(2*2或5*5mm)进行过滤。
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接种污泥投放之后,就可(kě)以少量的投加浓缩后的生污泥;
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对产气量、沼气的成分(fēn)、pH、上清液的VFA(挥发性脂肪酸)等指标进行检测;
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消化池正常运行后,就可(kě)以逐步增加投泥量,经过50~60天就可(kě)以达到设计时的负荷。
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使用(yòng)污泥启动,培养出颗粒污泥,通常需要1~3个月的时间一般分(fēn)為(wèi)启动期、颗粒污泥形成期和颗粒污泥成熟期;
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对于接种污泥,通常采用(yòng)厌氧污泥消化池中的厌氧污泥;
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培养过程中要求水温,pH等环境条件要稳定;
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反应器中的污泥负荷需要控制在0.05~0.1kgCOD/(kgSS·d),容积负荷则要小(xiǎo)于0.5kgCOD/(m³·d);
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VFA浓度需要保持在一个较低的浓度;
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為(wèi)了淘汰部分(fēn)絮状污泥,表面水力负荷要大于0.3m³/(㎡·d);
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进水中可(kě)以适当的提供无机颗粒(钙、铁等),必要时适当补充微量金属元素(镍、钴、钼等),促进产甲烷菌的生長(cháng);
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颗粒污泥的形状多(duō)种多(duō)样,呈现出球形、卵形、丝状等;
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平均粒径1mm,粒径通常在0.1~2mm之间,最大的也能(néng)达到3~5mm;
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颜色多(duō)為(wèi)黑色、灰色和灰白色,也会出现黄色或铁红色。
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