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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >Long-term performance of a full-scale submerged membrane bioreactor for bath wastewater reclamation
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Long-term performance of a full-scale submerged membrane bioreactor for bath wastewater reclamation

机译：大型浸没式膜生物反应器在浴废水回收中的长期性能

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摘要

Bath wastewater is an ideal source for wastewater reclamation for its large amount, simple pollutant composition and low pollutant content. The long-term stability of reclaiming bath wastewater was investigated with a 240 m~3/d full-scale submerged membrane bioreactor (SMBR) at an organic load of 1.04-2.80 kg-COD/ (m~3· d). The operation was continued for 450 days. Quality of obtained effluent met the wastewater reclamation standard of China, with COD < 35 mg/L, NH_3-N < 2.0 mg/L, anionic detergent <0.3 mg/L. Biological treatment removed most pollutants in the influent, degrading 46.9-93.5% of COD, 68.1-99.4% of NH_3-N and 98% of anionic detergent. Membrane separation balanced the unstable biological treatment of COD and NH_3-N but showed idleness to anionic detergent removal. Inorganic substances were not found to accumulate in the bioreactor. The main reason for membrane fouling was considered as sludge adhesion and gel layer formation over the outer membrane surface and microbial growth over the inner membrane surface. On line periodical chemical cleaning was effective to remove the fouling.
机译：浴废水量大，污染物组成简单且污染物含量低，是废水回收的理想来源。用240 m〜3 / d的全尺寸浸没膜生物反应器（SMBR）在有机负荷为1.04-2.80 kg-COD /（m〜3·d）的条件下研究了再生浴废水的长期稳定性。手术持续了450天。出水水质达到中国废水回收标准，化学需氧量<35 mg / L，NH_3-N <2.0 mg / L，阴离子去污剂<0.3 mg / L。生物处理去除了进水中的大部分污染物，降解了46.9-93.5％的COD，68.1-99.4％的NH_3-N和98％的阴离子去污剂。膜分离平衡了COD和NH_3-N的不稳定生物处理，但对阴离子去污剂的去除表现出惰性。未发现无机物质在生物反应器中积累。膜污染的主要原因被认为是污泥的粘附和在外膜表面上形成的凝胶层以及在内膜表面上的微生物生长。在线定期化学清洗可有效清除积垢。

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