What should be done with the sewage from the paper mill?

It is necessary to discharge up to the standard after treatment, and the discharge also needs a pollutant discharge permit, otherwise it will be regarded as a clandestine discharge, and it will be troublesome to be investigated for illegal discharge, and the fines for rectification will be light, and if it is serious, it will be imprisoned. Wastewater can be treated with water treatment agents such as simple ferrous sulfate or polyaluminium, or coagulants such as decolorizers.

Now the pressure on the paper mill is very large, the polluter is a big polluter, you have to treat it to meet the discharge standard, but then your water will be very strong, the cost is very high, it is recommended that you rinse and then carry out reverse osmosis ** utilization treatment, but in this case, your initial investment in sewage treatment will be very large, anyway, you have to have a good relationship with the local environmental protection bureau.

It is located next to the river, which is convenient for drainage and water intake.

The sewage of the paper mill should first be treated by acid precipitation sedimentation tank after A 0 technology, and it has reached the standard discharge.

I have a plan to give here, you **ask me for it,**on my username.**

Summary. Hello! Build a sewage treatment facility and treat the sewage to meet the national discharge standards before discharging.

Effluent from paper mills is easy to treat. Physical methods, filtration and precipitation methods to remove solid pollutants; Then chemically, add some flocculant in the precipitation; Then biological methods, get a biological oxidation pond or something, and dispose of heavy metals and some ions or something. And then it's basically up to the mark.

Hello! Build a sewage treatment facility and treat the sewage to meet the national discharge standards before discharging. Effluent from paper mills is easy to treat.

Physical methods, filtration and precipitation methods to remove solid pollutants; Then chemically, add some flocculant in the precipitation; Then biological methods, get a biological oxidation pond or something, and dispose of heavy metals and some ions or something. And then it's basically up to the mark.

I mean, the water is flowing into the field, what to do with it?

The sewage decolorizer of the paper mill can be added to the sewage tank.

Add the decolorizer of the paper mill wastewater directly to the field.

Depending on the raw materials and processes you produce, the composition of the wastewater pollution generated by different production processes will vary greatly.

Alkaline pulping middle wastewater: fiber, heterocellular, hemifiber, methanol, acetic acid, formic acid, sugar, lignin and derivatives, rosin acid and unsaturated fatty acids.

Mechanically ground wood pulp, semi-chemical pulp sewage: mainly fiber, lignin and derivatives, gelatin, etc.

Waste paper deinking wastewater: the main components are fibers and degradants, colloids, inks, deinking agents and other surfactants.

Contaminants are SS, COD, color, fine fiber fillers and additives, etc.

Summary. No, the wastewater generated in the papermaking process mainly includes preparation wastewater, equipment wastewater, washing and screening wastewater, bleaching wastewater, white water and condensate wastewater. Some of the chemicals and additives used in the papermaking process are retained in the finished paper, while the other part is discharged with the water flow.

Therefore, the pollutants in papermaking wastewater include some chemicals and additives (such as defoamers, sterilizers, etc.) in addition to raw materials.

The harm of papermaking wastewater is mainly manifested in two aspects, on the one hand, it is a serious pollution to the water environment, which will make the water stinky and cause the death of fish and shrimp and other organisms in the water.

On the other hand, it is extremely harmful to human health. Papermaking wastewater will pollute soil and groundwater, and endanger human health.

Therefore, papermaking wastewater must be treated by a professional environmental protection company before it can be discharged. Jinzheng Environmental Protection has a relatively mature technology in the treatment of papermaking wastewater, using DTRO technology, which can be used for reclaimed water reuse by more than 90%. Concentrated water can be treated with zero discharge.

Can paper mill wastewater be used as boiler feed water after treatment?

No, the wastewater generated in the papermaking process mainly includes preparation wastewater, equipment wastewater, washing and screening wastewater, bleaching wastewater, white water and condensate wastewater. Some of the chemicals and additives used in the papermaking process are retained in the finished paper, while the other part is discharged with the water flow. Therefore, the pollutants in papermaking wastewater include some chemicals and additives (such as defoamers, sterilizers, etc.) in addition to raw materials.

The harm of papermaking wastewater is mainly manifested in two aspects, on the one hand, it is a serious pollution to the water environment, which will make the water stinky and cause the death of fish and shrimp and other organisms in the water.

On the other hand, it is extremely harmful to human health. Papermaking wastewater will pollute soil and groundwater, and endanger human health.

Therefore, papermaking wastewater must be treated by a professional environmental protection company before it can be discharged. Jinzheng Environmental Protection has a relatively mature technology in the treatment of papermaking wastewater, using DTRO technology, which can be used for reclaimed water reuse by more than 90%. Concentrated water can be treated with zero discharge.

Boiler water treatment process: For boiler water, the quality required is higher. Because hard water will scale the boiler and affect heat transfer.

The oxygen, carbon dioxide and chloride ions in the water have an erosive effect on the boiler wall. The content of these impurities is slightly higher, which is not good for the operation of the boiler.

Characteristics of papermaking sewage.

1.The amount of papermaking wastewater discharged is large. According to statistics, 150 350 m3 of wastewater will be discharged for every ton of chemical pulp produced, and 20 70 m3 of wastewater will be discharged per ton of paper produced from pulp.

At present, China's combined pulp and paper wastewater per ton is 300-600 m3, of which 200-300 m3 is chemical wood pulp wastewater and 300-400 m3 of straw pulp wastewater, which is much higher than the wastewater discharge in industrialized countries.

2.The composition of papermaking wastewater is complex and the concentration is high. The annual CODCR discharge of papermaking wastewater in China is 3.27 million tons, accounting for 42% of the total industrial CODCR discharge, ranking first.

3.The content of toxic substances in the treatment of papermaking wastewater is high. Typical organic compounds include resins, tannins, chlorophenols, etc., as well as other organochlorides, organic sulfides, etc. Inorganic toxic compounds mainly contain sulfides, such as sulfates, hydrogen sulfide, etc.

4.The level of papermaking wastewater treatment is backward. Most of the paper mills are small and medium-sized factories, most of which use alkali wheat straw as raw material, and the proportion of wastewater treatment is low.

Papermaking sewage treatment method.

The combined technology of wastewater-grid-primary sedimentation tank-regulating tank-shallow air flotation-acidization tank-aerobic tank-secondary sedimentation tank-decolorization tank was used to treat the wastewater from recycled paper production. After passing through the grid, the wastewater enters the primary sedimentation tank and the regulating tank for pretreatment, and then further removes the suspended solids in the wastewater through efficient shallow air flotation, and then the effluent is discharged up to the standard after being treated by acidification and aerobic biochemical systems.

1.In the process of papermaking production, the wastewater of each section is collected through the manhole through the main pipe and enters the primary sedimentation tank, and a grid is set at the inlet of the tank body, which can effectively remove the larger solid debris in the sewage to ensure the smooth flow of sewage in the operation of pipelines and treatment equipment. The effluent of the primary sedimentation tank enters the regulating tank, and the regulating tank plays the role of regulating water quality and quantity, and the regulating capacity is designed with a high water volume of 10 hours.

2.After the adjustment of the papermaking wastewater treatment plant, the wastewater is lifted by the pump to the air flotation treatment unit, which is a high-efficiency shallow air flotation. Using the principle of shallow pool, dynamic water inlet, static water outlet, the pool is very shallow, the water depth does not exceed meters, which greatly shortens the air flotation treatment time, and has the characteristics of small diameter of dissolved air bubbles, high removal rate of suspended solids, uniform water distribution, and unique slurry.

The supernatant after air flotation treatment flows into the acidification tank, and the hydrolysis acidification tank in this treatment process is designed according to the mechanism of hydrolysis acidification, the first stage of anaerobic fermentation.

3.After the acidification tank treatment, the wastewater directly enters the aerobic biological contact oxidation tank, and its microorganisms will multiply in large numbers under the condition of sufficient dissolved oxygen and suitable nutrition in the sewage. When the organic matter in the sewage flows through the filler with the water, it is adsorbed and degraded by the biofilm, so that the sewage water quality is purified; The new microorganisms continue to inhabit, grow and multiply on the filler, while the aging microorganisms gradually fall off under the action of water and continue to metabolize.