In order to prevent the growth of organisms on the membrane surface during storage and the degradation of performance in subsequent operations, the membrane elements must be stored in a special solution. New module: (1) The membrane elements have been tested with water before leaving the factory, ...

Improper preparation of bid documents will not only become invalid bids, but also easily lead to bid abandonment. If there are less than three suppliers meeting professional conditions or substantially responding to the bidding documents, the bid shall be abandoned. More importantly, the bid documen...

Discussion on resource recovery and utilization of reverse osmosis concentrated water 1. Basic information The wastewater is concentrated brine discharged from the primary reverse osmosis desalination unit. Concentrated water will be produced during the preparation of pure water by reverse osmosis...

Reverse osmosis membrane separation technology (RO Technology for short) is a new and practical water treatment technology. For a specific reverse osmosis system, the long-term stability of its performance is indispensable. The success of long-term performance of reverse osmosis system depends on no...

After the membrane system operates for a period of time, sometimes the processing capacity decreases significantly and can not reach the design capacity. The reasons for this phenomenon are mainly related to the working environment of membrane system, type selection and design, installation and cons...

Oil and grease cannot be contained in the reverse osmosis feed water, because the presence of oil and grease in the raw water may cause chemical degradation of the aromatic polyamide active layer of the reverse osmosis membrane in the application process and cause degradation of membrane performance...

Before talking about the role of reverse osmosis scale inhibitor, the water treatment equipment briefly describes the reverse osmosis system: the reverse osmosis water treatment equipment passes the raw water through precision filter, granular activated carbon filter, compressed activated carbon fil...

Common water treatment methods include: (I) sediment filtration method, (II) hard water softening method, (III) activated carbon adsorption method, (IV) deionization method, (V) reverse osmosis method, (VI) excess filtration method, (VII) distillation method, (VIII) ultraviolet disinfection method, ...

1、 MBR membrane fouling judgment On line maintenance and cleaning: it has nothing to do with the pressure difference. Stop filtering regularly (about once a week) and drive the low concentration (300 ~ 500mg / L) solution into the membrane for cleaning. Online enhanced washing: monitor and manage...

Working principle of manganese and iron removal by manganese sand There are many methods to remove iron and manganese. Generally, the principle of oxidative removal of iron and manganese is adopted. It is the most economical and effective treatment method at present. Many equipment use natural mang...

Summarize the common problems and answers in sewage treatment practice: Question 1: Process: hydrolysis + contact oxidation method. The COD of effluent is 70mg / L, but it looks very turbid. I don't know why? Is the method of measuring MLSS the same as that of Measuring SS? answer: (1) If to...

Can't the water pump start? Insufficient flow? Can't suck water? Vibration, noise, motor failure... What should I do? The water pump cannot be started Common causes: the packing is too tight or the impeller and pump body are blocked by sundries; The pump shaft, bearing and leakage reducing...