Effects of anaerobic digester solids retention time on odor emission and dewaterability of biosolids subjected to various shear intensities, polymer doses, and storage duration times,Environmental Science: Water Research & Technology

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Effects of anaerobic digester solids retention time on odor emission and dewaterability of biosolids subjected to various shear intensities, polymer doses, and storage duration times
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2020-03-26 , DOI: 10.1039/d0ew00028k
Dian Zhang _{1,

2,

3,

4} , Mary Strawn _{4,

5,

6} , Tom Broderick _{4,

5,

6} , John T. Novak _{1,

2,

3,

4} , Zhi-Wu Wang _{1,

2,

3,

4}

Affiliation

Odor emitted during biosolids handling is a major issue for utilities and may pose a serious nuisance to surrounding communities. The purpose of this study is to assess the effects of solids retention times (SRTs) of mesophilic anaerobic digesters on the odor emission from biosolids dewatered under various shear intensities and polymer doses. It was found that the digester SRT varying from 15 to 50 days had a very limited effect on the odor precursor reduction in biosolids. Hence, no significant variance in odor emission was observed when SRT was evaluated alone. In contrast, the polymer dose and shear intensity used for dewatering showed more effects than SRT on odor emission and biosolids dewaterability. In general, biosolids dewatered at higher shear intensity tended to consume more polymers to achieve the desired cake dryness, and the peak odor emission was found to increase with both the shear intensity and the polymer dose likely due to the increased protein capture and exposure by the polymer and shear used for dewatering.

中文翻译：

厌氧消化池中固体的停留时间对各种剪切强度，聚合物剂量和储存时间对生物固体气味排放和脱水能力的影响

生物固体处理过程中散发的气味是公用事业的主要问题，可能会对周围社区造成严重滋扰。这项研究的目的是评估中温厌氧消化器的固体保留时间（SRT）对在各种剪切强度和聚合物剂量下脱水的生物固体产生的气味释放的影响。发现蒸煮器SRT在15到50天之间变化对生物固体中气味前体的减少影响非常有限。因此，当单独评估SRT时，没有观察到气味排放的显着变化。相反，用于脱水的聚合物剂量和剪切强度显示出比SRT对气味排放和生物固体脱水能力更大的影响。通常，以较高的剪切强度脱水的生物固体倾向于消耗更多的聚合物以达到所需的滤饼干燥度，

更新日期：2020-03-26

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