lehu乐虎

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...

The high / low pressure protection of water treatment reverse osmosis equipment is to prevent the RO high-pressure pump from idling or working under the limit high / low pressure. High voltage switch is used for high voltage protection. With the increase of equipment service time, the membrane will...

Which word is pH abbreviated? After middle school and entering the health care mode in advance, we must be familiar with the concept of pH. In addition to the pH of the solution, the human body also has pH, which is judged according to the pH of body fluid (body fluid or body fluid). PH value 7 i...

（1） Judgment question: We can dispose of domestic garbage in the way we want. （ (wrong) 2. Within the closed protection area of sandy land, all activities damaging vegetation are prohibited. （ Right) 3. Poor visibility in haze days is caused by PM2.5. （ (wrong) 4 coal and oil are renewable ene...

Compared with other sterilization and disinfection methods, ultraviolet sterilizer and ozone generator are more widely used in water treatment industry in recent years. Ultraviolet rays can destroy bacterial DNA, and ozone can play a strong role in oxidation. They have their own advantages in steril...

1. What is water self purification? Self purification of water body: the polluted river reduces or transforms the concentration of pollutants through physical, chemical and biological effects, and the water body returns to its original state, or reduces from exceeding the water quality standard to ...

泵的扬程计算是选择泵的重要依据，泵扬程与流量的关系可以参照下面这张图。 泵扬程由管网系统的安装和操作条件决定，计算前应首先绘制流程草图，平、立面布置图，计算出管线的长度、管径及管件型式和数量。 一般管网如下图所示 D——排出几何高度，m； 取值：高于泵入口中心线：为正；低于泵入口中心线：为负； S——吸入几何高度，m； 取值：高于泵入口中心线：为负；低于泵入口中心线：为正； Pd、Ps——容器内操作压力，m液柱（表压）； 取值：以表压正负为准 Hf1——直管阻...

混凝？絮凝？助凝？ 在水处理药剂中，应用最广泛的是当属混凝与絮凝、聚合氯化铝与聚丙烯酰胺了。那么两者在使用过程中具体有哪些注意事项？让我们一来一探究竟。 凝聚：投加混凝剂后水中的胶体失去稳定性，胶体颗粒互相凝聚，结果形成众多的“小矾花”。 絮凝：凝聚过程中形成的“小矾花”通过吸附、卷带、架桥等作用，形成颗粒较大絮凝体的过程。 混凝：是凝聚、絮凝两个过程的总称。是水中胶体粒子及微小悬浮物的聚集过程。 也就是说，“混凝”包含了从原水投药到水混合、药反应（脱稳、絮凝）再到形成大颗粒的絮凝物的整个过程。 而絮凝是指胶体...

1、 What is ultrafiltration membrane Ultrafiltration membrane is one of the earliest developed polymer membranes, and it is a microporous filter membrane with a rated pore size range of 0.001-0.02 μ M. The solvent in the solution and some of the solutes with low molecular weight penetrate the oth...