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首页> 外文期刊>Aquacultural Engineering: An International Journal >The start-up and saline adaptation of mesophilic anaerobic sequencing batch reactor treating sludge from recirculating aquaculture systems.
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The start-up and saline adaptation of mesophilic anaerobic sequencing batch reactor treating sludge from recirculating aquaculture systems.

机译：中温厌氧测序分批反应器的启动和盐水适应性，用于处理来自循环水产养殖系统的污泥。

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Treatment of sludge from aquaculture is a matter of special importance and there is a need for salt-tolerant biological wastewater treatment to coincide with the development of brackish/marine aquaculture. The aims of the current study were to determine the ability of anaerobic sequencing batch reactor (ASBR) to anaerobically digest sludge from fresh-water recirculating aquaculture systems and the ability of adaptation to low saline conditions. The mesophilic ASBR were evaluated with loading rates between 0.12 and 0.41 g chemical oxygen demand (COD)/day at a 20-day hydraulic retention time (HRT) for start-up and with organic loading rates (OLR) of 0.39-0.41 g COD/L day at a 20-day HRT for saline adaptation. The average removal rate of total chemical oxygen demand (TCOD), total suspended solids (TSS) and volatile suspended solids (VSS) of the ASBR were above 97%, 96% and 91% during the stabilization period of the experimental reactors. The average daily gas production of ASBR was between 0.013 and 0.022 L/g TCOD from day 118. A sludge-mass reduction of up to 942.3%, TCOD reduction of 4413% and VSS/SS of 39-70% were demonstrated for the reactor performance during the gas production period. However, the process of gas production was obviously inhibited, presumably by salt, and unstable due to the dissolved COD (DCOD), total ammonium nitrogen (TAN) and alkalinity of the effluents of the experimental reactors and TSS and sludge volume index (SVI) observed within the reactors. The daily gas production was observed to decrease during the saline adaptation period and stopped when the salinity of the effluents was higher than 8.7 ppt until the end of the experiment.
机译：来自水产养殖的污泥的处理是特别重要的问题，并且需要耐盐生物废水的处理，以适应咸淡/海洋水产养殖的发展。当前研究的目的是确定厌氧测序间歇反应器（ASBR）从淡水循环水产养殖系统厌氧消化污泥的能力以及适应低盐条件的能力。在启动20天水力停留时间（HRT）时，以0.12至0.41 g化学需氧量（COD）/天的负载率评估了中温ASBR，有机负载率（OLR）为0.39-0.41 g COD / L天，在20天的HRT中进行盐分适应。在实验反应器的稳定期，ASBR的总化学需氧量（TCOD），总悬浮固体（TSS）和挥发性悬浮固体（VSS）的平均去除率分别高于97％，96％和91％。从第118天开始，ASBR的平均日产气量在0.013至0.022 L / g TCOD之间。该反应堆的污泥质量减少量高达942.3％，TCOD减少量为4413％，VSS / SS为39-70％。天然气生产期间的性能。但是，产气的过程明显受到了盐的抑制，并且由于溶解的COD（DCOD），总铵氮（TAN）和实验反应器流出物的碱度以及TSS和污泥体积指数（SVI）而受到抑制。在反应堆中观察到。观察到每天的产气量在盐适应期期间减少，并在流出物的盐度高于8.7 ppt时停止，直到实验结束。

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