| 某污水处理厂MBR膜系统新增组器运行效果分析 |
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| 引用本文： | 吕龙,张怡晓,张颖,孟繁龙,李超,汪涵.某污水处理厂MBR膜系统新增组器运行效果分析[J].环境工程,2021,39(7):162. |
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| 作者姓名： | 吕龙 张怡晓 张颖 孟繁龙 李超 汪涵 |
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| 作者单位： | 北京碧水源膜科技有限公司,北京104107 |
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| 摘 要： | 膜生物反应器（MBR）技术由于其占地面积小、出水水质好、生物量大、产泥率低等优点在水处理行业被广泛应用。自2010年以来，我国MBR投运水厂数量呈快速上升趋势。如今，早期投运水厂MBR产品性能衰减严重或已达使用年限，无法继续满足处理水量的要求，陆续出现新增膜组器以及更换膜组器的需求。以某水厂新增组器项目为例，评价新增膜组器后，原膜组器与新膜组器的运行情况，并对组器性能差异产生的系统运行影响进行分析。结果表明:新增膜组器在通量20.8 L/（m2·h）、曝气强度70 Nm3/（m2·h）、气水比6条件下稳定运行160 d，膜比通量衰减约30%，体现出较好的运行性能。同时，新组器吹扫能耗低于原组器，起到节能降耗的作用。此外，在回流量无法提高的前提下，新组器的高通量运行可能会导致廊道污泥浓度分布不均，回流端污泥浓缩显著。受产水管压力损失影响，廊道各组器产水量的差异性会导致各组器污染程度不同。
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| 关 键 词： | MBR 膜比通量 吹扫能耗 膜污染 |
| 收稿时间： | 2021-02-26 |
OPERATION EFFECT ANALYSIS OF NEW ADDED MEMBRANE CASSETTES IN A MBR MEMBRANE SYSTEM IN A WASTEWATER TREATMENT PLANT |
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| Affiliation: | Beijing OriginWater Membrane Technology Co., Ltd, Beijing 104107, China |
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| Abstract: | Membrane bioreactor(MBR) technology has been widely used in water treatment industry because of its advantages like small footprint, good effluent quality, large biomass and low sludge yield. Since 2010, the number of MBR water plants has been increasing rapidly in China. Nowadays, the performance of MBR products in the early water plants has deteriorated seriously or reached the service life, cannot continue to meet the requirements of the treatment water quantity, and there is a need to add new membrane cassettes and replace membrane cassettes successively. This paper took a new assembly water plant project as an example, evaluated the operation of the original and new membrane cassettes after the addition of the membrane cassettes, and analysed the influence of the cassettes' difference on the system operation. The results showed that the new membrane cassettes ran stably for 160 days under the conditions of flux of 20.8 L/(m2·h), aeration intensity of 70 Nm3/(m2·h) and air-water ratio of 6, and the specific flux attenuation reached about 30%. At the same time, the scavenging energy consumption of the new assembly was lower than that of the original assembly. In addition, on the premise that the return flow cannot be improved, the high-throughput operation of the new packer may lead to uneven distribution of sludge concentration in the corridor and significant sludge concentration at the return end. Influenced by the pressure loss of the production pipe, the difference of the water production of each unit in the corridor resulted in different pollution degree of each unit. |
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