最新日本久久中文字幕-五月激情六月丁香欧美-国产精品一区二区午夜久久-91精品欧美激情在线

[nav:name]

Maintenance and cleaning of mbr membrane of mbr membrane module

Release time:2021-04-02 Views:1875

Maintenance of MBR membrane system After the MBR system has been used for a period of time, because the contaminants accumulate on the membrane surface to increase the pressure difference between the membranes, the membrane modules need to be cleaned and maintained. The initial pressure difference between the membranes is about 10KPa , and the MBR membrane module has been filtered for a period of time. After that, when the pressure difference between the membranes is 20 KPa higher than the initial stage, it is necessary to perform chemical cleaning. When the transmembrane pressure difference reaches 35kPa  , restorative cleaning must be performed. When the membrane flux cannot be recovered effectively through restorative cleaning, off-line chemical cleaning should be considered.

MBR regularly on-line chemical cleaning can be maintained MBR system is stable, while the two later years, the water flux of the membrane system producing the original initial state of about 90 - 95% .

MBR system online chemical cleaning maintenance steps:

In order to ensure the good water production performance of MBR membranes, the membranes should be cleaned regularly online. If the transmembrane pressure difference reaches or exceeds 35 kPa  and then cleaned, the recovery effect will be greatly affected.

The recommended online chemical cleaning method is: maintenance cleaning once a week, restorative cleaning once a month, and pickling at least once every six months.

(1) Type and frequency of medicine cleaning

 Commonly used liquid medicines are sodium hypochlorite, citric acid, and oxalic acid solutions.

① Maintenance cleaning: once a week, 500  ~  1500 mg/L  sodium hypochlorite aqueous solution, the concentration of the chemical solution shall be subject to actual engineering needs;

② recovery cleaning: once a month, 2000  ~  3000 mg / L  of aqueous sodium hypochlorite solution;

③ Pickling cycle: once every six months or according to the specific pollution of the membrane filament, 1 ~ 2% (mass fraction) citric acid or oxalic acid solution.

2) Dosage

The amount of medicament used per square meter of membrane area is 2 to  4 L , plus the amount required to fill the drug delivery pipeline.

3) Online chemical cleaning steps

① Stop filtering and aeration: first turn off the water production pump and close the water production pneumatic valve for the corridors that need to be cleaned, and turn off the aeration after 1 to 2 minutes  . It must be confirmed on site that the aeration has been completely closed. The water inlet and backflow of the corridor are also closed, and then the valve of the medicine supply pipeline is opened;

② Adding chemical solution: In areas with low water temperature, you should consider heating the cleaning solution appropriately. Increasing the temperature can improve the cleaning effect. The recommended cleaning solution temperature is 25  ~  35 ℃. Open the liquid medicine injection tube and inject the liquid medicine; add the liquid medicine in three batches, each adding one-third of the amount of the medicine. Adding method: dosing at the top for 5 min and rest for 5 min ; after that, do the second dosing, add Do the medicine for 5 minutes and stay for 5 minutes ; do the third dosing, do the medicine for 5 minutes , and then close the corridor medicine supply valve;

③ After the dosing is completed, let it stand for  to  1.5 hours , and then empty aerate (only aeration does not produce water). After 0.5  to  1 hour  , open the corridor for water inflow and backflow to restore the water production to the automatic state.



Last:The role of mbr membrane in the treatment of landfill leachate

Next:沒(méi)有了!

中日韩美一级特黄大片| 尤物天堂av一区二区| 免费精品一区二区三区| 伊人久久青草地综合婷婷| 99亚洲综合精品成人网色播| 亚洲精品中文字幕在线视频| 国产爆操白丝美女在线观看| 欧美日韩综合在线第一页| 国产内射一级一片内射高清视频| 91老熟妇嗷嗷叫太91| 中文字幕一区二区熟女| 日韩在线视频精品视频| 欧美一区二区日韩一区二区| 高清欧美大片免费在线观看| 国产中文另类天堂二区| 日本女优一色一伦一区二区三区| 精品人妻一区二区三区四在线| 精品日韩欧美一区久久| 午夜精品国产精品久久久| 五月婷婷六月丁香亚洲| 熟女高潮一区二区三区| 亚洲国产av国产av| 91蜜臀精品一区二区三区| 国产专区亚洲专区久久| 欧美午夜色视频国产精品| 国产精品成人一区二区在线| 日本在线视频播放91| 欧美一级黄片欧美精品| 日本午夜乱色视频在线观看| 欧美国产在线观看精品| 成年女人午夜在线视频| 日韩一级毛一欧美一级乱| 激情五月天深爱丁香婷婷| 日韩蜜桃一区二区三区| 欧洲精品一区二区三区四区| 国产一区二区三区草莓av| 九九热精彩视频在线免费| 欧美日韩国产综合在线| 中文字幕一二区在线观看| 麻豆一区二区三区精品视频| 日本不卡一区视频欧美|