陶瓷膜清洗

1. When to clean ? 什么时候清洗？

When permeateflux reach minimum value defined当透过液流量低于设定的最小值时

2. How to clean ? 怎样清洗

Alcalin cleaningagent or chlorinated alcalin cleaning agent solubilize grease and organicmatters laying on membrane surface. Chlorine can be necessary in case ofbacterial pollution.用碱或酸清洗剂清洗附在膜表面的油和有机物质。同时可用次氯酸杀菌。

Acid cleaningagent is able to solve carbonate/bicarbonate laying on membrane surface and/oriron oxide. 酸清洗剂用来溶解膜表面的碳酸盐和铁氧化物

3. How to control cleaning efficiency? 怎样控制清洗效果

water fluxmeasurement taking into account important parameters such as :水通量测试是非常重要的评价数据，因此需要下列数据：

- inlet andoutlet module pressures (average pressure)进出口压力（平均压力）

- temperature温度

- permeate flux透过液流量

4. CERAMIC MEMBRANES CLEANING PROCEDURE(陶瓷膜清洗流程)

1) stop the UFunit after overconcentration step 超浓缩结束后停止系统

2) Flush usinghot permeate or hot water (process temperature)用热水或透过液冲洗（工艺温度）

3) Alcalincleaning or alcalin chlorinated cleaning (0.5 to 1%)- 80°C to 85°C during 30minutes碱液或碱+次氯酸液清洗30分钟（浓度0.5 to 1%，温度80到 85°C ）

4) Draining andrinsing using permeate or water排放清洗液，并用透过液冲洗

5) Water fluxmeasurement水通量测试

6) Acid cleaningif water flux is lower than 70 % of initial permeate flux got with new membraneNitric acid 0.1 % to 0.2 % or acid chemicals 0.5 % to 1 % at room temperature - 15 minutes Oxalic acid 0.5 % to 1 %(iron) at room temperature

如果水通量低于新膜通量的70%，用0.1%到0.2%的硝酸室温下清洗15分钟

7) Draining andrinsing using permeate or water 排放酸清洗液，并用透过液冲

8) Water fluxmeasurement水通量测试

9) Go to point n°3 in case of weak permeate flux如水通量过低，返回第3步操作

10) Contact us ifcleaning efficiency is out of expected value.联系我们，如果清洗效果仍不理想。