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首页> 外文会议>Proceedings of the 7th international conference on environmental anaerobic technologies and bioenergy >Nitrogen Removal for Post-treatment of Anaerobic Digestion Liquor
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Nitrogen Removal for Post-treatment of Anaerobic Digestion Liquor

机译：脱氮用于厌氧消化液的后处理

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To facilitate an anaerobic treatment for animal manure and organic solids wastes the challenge is to incorporate reasonable N-removal process. Many facilities encounter problems where N-removal is concerned. Traditional N-removal requires large volumes of oxygen that can be costly. For this application oxygen saving technologies are needed. Amongst N-removal methods, the anaerobic ammonia oxidation (anammox) process provides a new low-cost biological way to treat wastewater having many advantages compared to other N-removal processes. The focus of this paper is the activity control of nitrite oxidising bacteria (NOB) for partial nitritation of ammonia to nitrite, the primary substrate for anammox. In recent decades inhibition has been extensively studied to evaluate the nitrite concentration effect on NOB's reaction rate whereas there is limited information about the response of growth and decay for NOB especially in a full-scale operation and which stage the inhibition acts on. To explain this, a set of long-term batch operations using different nitrite concentrations was conducted. Oxygen uptake rate (OUR) recovered in the initial few hours and this was considered to be recovery from shock loading that existed on the growth stage of NOB. Upon a peak value, OUR decreased continuously and this was attributed to poisoning that contributed to the acceleration of decay. To express the growth recovery and the poisoning decay, a mathematical model was developed based on the modification of an existing Activated Sludge Model. The model could reproduce the batch OUR curves having various shapes depending on different initial nitrite concentrations.
机译：为了促进动物粪便和有机固体废物的厌氧处理，挑战在于采用合理的氮去除工艺。许多设施在涉及除氮方面遇到问题。传统的脱氮需要大量的氧气，这可能很昂贵。对于该应用，需要节省氧气的技术。在除氮方法中，厌氧氨氧化（anammox）工艺提供了一种新型的低成本生物方法来处理废水，与其他除氮方法相比，它具有许多优势。本文的重点是控制亚硝酸盐氧化细菌（NOB）的活性，以将氨部分硝化为亚硝酸盐（亚硝酸盐的主要底物）。近几十年来，已经广泛研究了抑制作用以评估亚硝酸盐浓度对NOB反应速率的影响，而关于NOB的生长和衰变响应的信息有限，尤其是在大规模操作中以及抑制作用的作用阶段。为了解释这一点，进行了一系列使用不同亚硝酸盐浓度的长期批量操作。氧气吸收率（OUR）在最初的几个小时内恢复了，这被认为是从NOB生长阶段存在的冲击负荷中恢复的结果。在达到峰值时，OUR持续下降，这是由于中毒导致了衰变加速。为了表达生长恢复和中毒衰减，在修改现有活性污泥模型的基础上，开发了一个数学模型。该模型可以根据不同的初始亚硝酸盐浓度再现具有各种形状的批量OUR曲线。

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