summary:

In many regions of our country, the levels of iron and manganese in groundwater are relatively high, exceeding or significantly exceeding the hygiene standards for drinking water and industrial water.

Iron and manganese containing water has an iron fishy smell and can produce brown rust spots on various household appliances during use. Washing clothes can dye them yellow or brownish yellow stains. The iron that settles on the inner wall of the pipeline can promote the growth of iron bacteria, causing the faucet to release "red water"; Iron (manganese) containing water used in papermaking, textiles, film manufacturing, or leather making can cause stains on products and cannot improve product quality. In order to meet the needs of drinking water and industrial water, and to develop and utilize underground water resources containing iron (manganese), our company, in collaboration with research institutions such as Tongji University, has developed a novel and efficient integrated iron (manganese) removal equipment - the CMJ series iron and manganese removal water purifier.

The CMJ series iron and manganese removal water purifier adopts a new technology "active biofilm contact oxidation method". Due to the simple process flow of this product, no chemicals need to be added for iron and manganese removal. It has the characteristics of stable and reliable operation, strong applicability to water quality, high treatment efficiency, and significant economic benefits. It is an ideal equipment for iron and manganese removal.

MJ series iron and manganese removal water purification principle:

Iron and manganese in groundwater generally exist in a divalent state. The main principle of water purification in this equipment is to aerate the groundwater containing iron (manganese), and the iron (manganese) in the water begins to oxidize. When the water flows through the manganese sand or specially designed quartz sand filter layer, due to the chemical action of the filter material and the biochemical action of iron (manganese) bacteria on the surface of the filter material (such as multiple spore forming bacteria, iron containing bacteria, single-cell iron bacteria, and rust colored bacteria), biochemical reactions, contact oxidation reactions, and physical interception and adsorption begin to occur in the filter material layer. The combined effect of these processes can greatly accelerate the oxidation, solidification, and removal of iron (manganese) in the water, thereby achieving the expected effect.

technological process:

1. When the iron concentration in groundwater is between 5-10mg/L and the manganese concentration is between 1-2mg/L, or when groundwater contains only iron but no manganese and the iron concentration is around 10mg/L, aeration - single-stage iron and manganese removal filter process flow can be used: deep well - deep well pump - oxygenation aerator - iron and manganese removal water purifier - water tower (or pool)

2. If the iron and manganese content in groundwater is high, that is, iron is greater than 10mg/L and manganese is greater than 2.0mg/L, it is advisable to use a two-stage aeration process for iron and manganese removal: deep well, pressure pump, oxygen aerator - stage iron and manganese removal water purifier - stage one iron and manganese removal water purifier - stage one iron and manganese removal water purifier - water tank (or water tower)

3. Process flow diagram of single-stage pressure type iron and manganese removal water purifier 4, process flow diagram of single-stage gravity or iron and manganese removal water purifier

Operation, installation, and key points:

1. The iron (manganese) filter should be placed on a horizontal concrete foundation, which should be stable to prevent uneven settlement.

2. Before filling the filter material, it should be carefully screened according to the requirements. After screening, it should be filled layer by layer from bottom to top and from large to small.

3. After the filter material is filled, it should be backwashed in a timely manner. The water flow should be from bottom to top to wash away the unqualified filter material sand powder and mud water in a timely manner until the effluent is clear before it can be officially operated.

4. When using quartz sand filter material, the filter should initially operate at a low filtration rate, and gradually increase the filtration rate after the formation of the oxide film.

5. The backwash cycle is generally determined by the treated water quality and pressure. When the difference between the inlet and outlet pressure gauges reaches the allowable loss value of the equipment, backwash should be carried out. When the iron (manganese) content in the filtered water exceeds the specified value, backwash should be carried out immediately.

6. The backwash intensity is generally around 15L/S · m2, and the backwash duration is generally 5-7 minutes.

7. During the initial operation stage of the equipment, the backwash water volume should not be too large and the strength should not be too high. Only loose filter materials should be used to avoid affecting the formation of biologically active filter membranes.

8. The filter material of the iron (manganese) removal filter should be sandblasted annually, crushed into large pieces that are bonded together, and the thickness of the filter layer should be observed. If the filter layer is found to be thinner, it should be replenished.