When ferrous sulfate is used for wastewater treatment, it's not that more is better. Lvyuan Environment Group Co.,Limited reminds you that if excessive ferrous sulfate is added to the water, the following problems will be caused: 1. When excessive ferrous sulfate is added to the water, the hydrolyzed ferrous ion is excessive in the water, and the ferrous ion as the reducing agent is easily oxidized to ferric ion.Because the ferric ion is red, the water quality will turn red when a large number of ferric ion precipitation occurs. If it is not used properly or coagulation conditions are improper, pH value is low, it will cause iron ions to dissociate, and then be oxidized into ferric ions. 2. Adding excessive ferrous sulfate in water will enhance the acidity of raw water. Ferrous sulfate is a kind of strong acidic chemical agent. Excessive addition of ferrous sulfate will increase the acidity of the water. It is unnecessary to add additional acid neutralizer for the wastewater that needs to reduce the pH value. However, for other wastewater, the pH value of the water body will decrease, and the acidity of the overall water quality will be strengthened, which will affect the flocculation effect of water treatment. 3. The amount of sludge increased. For most chemical agents, the greater the dosage, the greater the amount of sludge produced. This is relative to microbial treatment, because ferrous sulfate itself reacts with wastewater to generate more metal salts, so a large amount of sludge will be produced. 4. The cost of water treatment increases and the treatment effect weakens. When ferrous sulfate is added too much, it will not only increase the cost of water treatment, but also increase the cost of other auxiliary agents (such as neutralizing agent), labor cost, sludge treatment fee, etc. at the same time, it will also affect its coagulation effect, so that the formed flocs will be affected and disintegrate.