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Food industry wastewater treatment equipment
1、 Overview of wastewater treatment in the food industry The food industry, as a low input and high-efficiency industry, is an important link in China
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1、 Overview of wastewater treatment in the food industry
The food industry, as a low input and high efficiency industry, is an important link in domestic economic growth and undoubtedly plays a promoting role in China's economic development. However, the direct discharge of industrial wastewater from the food industry has also caused enormous pressure on the water environment, becoming one of the main sources of water pollution. The food industry has a wide range of wastewater sources and a wide variety of products, resulting in significant differences in the amount and quality of wastewater discharged. The characteristics of wastewater are high content of organic matter and suspended solids, easy to decompose, and generally not highly toxic. Its harm mainly lies in eutrophication of water bodies, leading to the death of aquatic animals and fish, causing organic matter deposited at the bottom of the water to produce odors, deteriorating water quality, and polluting the environment. In response to these complex characteristics, Dongguan Gaoda Environmental Protection Technology Co., Ltd. can provide customers with economical, reasonable, safe, and energy-saving treatment solutions and engineering services based on different requirements for food wastewater discharge according to regulations. The treated water quality can meet the discharge standards for water pollutants in the meat processing industry (GB13457-92) and the environmental quality standards for surface water in the food industry (GB3838-88)
Solid substances floating in wastewater, including oils, proteins, starch, colloidal substances, acids, alkalis, salts, sugars dissolved in wastewater, mud and sand carried by raw materials, other organic matter, pathogenic bacteria and toxins.
1. Physical treatment method: Physical treatment method refers to the treatment method of changing the composition of wastewater by physical action. Used for foodIndustrial wastewater treatmentMethods such as screening, removal, adjustment, precipitation, and air flotation are used for pretreatment or primary treatment, while centrifugal separation, filtration, and microfiltration are mainly used for deep treatment.
2. In its wastewater treatment, it contains a large amount of organic matter and oxygen consumption is a characteristic of organic wastewater. Therefore, biochemical methods are generally used for the treatment of organic wastewater.
Physical and chemical disinfection processes can be used, as follows:;
Source Water --->Regulating Tank --->Filtration Tank --->Disinfection Tank --->Storage Tank --->Discharge When using residential sewage as the source of reclaimed water, the biochemical+disinfection process can be used, as follows: Source Water --->Hydraulic Screen --->Regulating Tank --->Biochemical Tank --->Filtration Tank --->Disinfection Tank --->Storage Tank --->Discharge The above process facilities can be designed as above ground or underground structures according to the specific situation on site.
1. Understand the materials used in the equipment
There are usually two types of materials used for buried equipment: fiberglass and carbon steel. When purchasing equipment, it is necessary to inquire with the supplier about the materials used. When the process and other conditions are the same, the price of different materials will vary greatly.
2. Go to the supplier's successful case site to observe the effect
Everything should be based on facts. No matter how the supplier who provides you with the equipment introduces its superior performance, you should ask the supplier to provide previous successful cases and then send someone to inspect its on-site sewage treatment effect. Although it may delay some time, it is indeed crucial.
3. Agreed execution standards for water discharge
Many units fail to specify the standard for sewage treatment in the contract when purchasing buried sewage treatment equipment, which can lead to disputes in the future when environmental protection requirements are raised. Due to different levels of treatment, the cost of sewage treatment can vary greatly.
4. Compare and sign contracts before purchasing, and specify the payment process
Choose several suppliers as references, and then compare their adopted processes, successful cases, prices, and other factors comprehensively.
Sign a formal contract and agree on the delivery, commissioning, and payment process before paying the deposit.
The food industry, as a low input and high efficiency industry, is an important link in domestic economic growth and undoubtedly plays a promoting role in China's economic development. However, the direct discharge of industrial wastewater from the food industry has also caused enormous pressure on the water environment, becoming one of the main sources of water pollution. The food industry has a wide range of wastewater sources and a wide variety of products, resulting in significant differences in the amount and quality of wastewater discharged. The characteristics of wastewater are high content of organic matter and suspended solids, easy to decompose, and generally not highly toxic. Its harm mainly lies in eutrophication of water bodies, leading to the death of aquatic animals and fish, causing organic matter deposited at the bottom of the water to produce odors, deteriorating water quality, and polluting the environment. In response to these complex characteristics, Dongguan Gaoda Environmental Protection Technology Co., Ltd. can provide customers with economical, reasonable, safe, and energy-saving treatment solutions and engineering services based on different requirements for food wastewater discharge according to regulations. The treated water quality can meet the discharge standards for water pollutants in the meat processing industry (GB13457-92) and the environmental quality standards for surface water in the food industry (GB3838-88)
2、 The main sources of pollution in food industry wastewater
Solid substances floating in wastewater, including oils, proteins, starch, colloidal substances, acids, alkalis, salts, sugars dissolved in wastewater, mud and sand carried by raw materials, other organic matter, pathogenic bacteria and toxins.
3、 Principles and Methods of Industrial Wastewater Treatment in the Food Industry
1. Physical treatment method: Physical treatment method refers to the treatment method of changing the composition of wastewater by physical action. Used for foodIndustrial wastewater treatmentMethods such as screening, removal, adjustment, precipitation, and air flotation are used for pretreatment or primary treatment, while centrifugal separation, filtration, and microfiltration are mainly used for deep treatment.
2. In its wastewater treatment, it contains a large amount of organic matter and oxygen consumption is a characteristic of organic wastewater. Therefore, biochemical methods are generally used for the treatment of organic wastewater.
| 1. Coagulation method, colloidal substances in water usually carry charges, and the gel like substances repel each other and cannot condense, often forming stable mixtures. | 6. Blow off method, blowing air into the wastewater to blow the dissolved gases into the atmosphere. |
| 2. Neutralization method, which uses chemical methods to neutralize acidic or alkaline wastewater to achieve neutrality. | 7. Adsorption method, which involves passing wastewater through a solid adsorbent to adsorb soluble organic or inorganic substances in the wastewater onto the adsorbent. The commonly used adsorbent is activated carbon. |
| 3. Oxidation reduction method, in which dissolved organic or inorganic substances in wastewater undergo oxidation or reduction due to the migration of electrons after the addition of oxidants or reducing agents, becoming harmless substances. | 8. Electrodialysis is a process in which ions in a solution are transferred through a membrane under the action of an electric field. |
| 4. Electrolysis method, inserting electrodes into wastewater. Accepting electrons on the cathode plate neutralizes the ion charge and transforms it into a neutral atom. | 9. Reverse osmosis method uses a special semi permeable membrane to compress water molecules under a certain pressure, while solutes are intercepted by the membrane, resulting in concentrated wastewater. The water compressed through the membrane is the water used in the treatment process. |
| 5. Extraction method involves adding a solvent that is insoluble in water into the wastewater, allowing the solute in the wastewater to dissolve in the solvent. Then, the solvent is separated using the difference in specific gravity between the solvent and water. |
4、 Reclaimed Water System for Food Industry Wastewater Treatment
Physical and chemical disinfection processes can be used, as follows:;
Source Water --->Regulating Tank --->Filtration Tank --->Disinfection Tank --->Storage Tank --->Discharge When using residential sewage as the source of reclaimed water, the biochemical+disinfection process can be used, as follows: Source Water --->Hydraulic Screen --->Regulating Tank --->Biochemical Tank --->Filtration Tank --->Disinfection Tank --->Storage Tank --->Discharge The above process facilities can be designed as above ground or underground structures according to the specific situation on site.
industrial wastewater treatment equipment
5、 What should I pay attention to when purchasing food industry wastewater treatment equipment?
1. Understand the materials used in the equipment
There are usually two types of materials used for buried equipment: fiberglass and carbon steel. When purchasing equipment, it is necessary to inquire with the supplier about the materials used. When the process and other conditions are the same, the price of different materials will vary greatly.
2. Go to the supplier's successful case site to observe the effect
Everything should be based on facts. No matter how the supplier who provides you with the equipment introduces its superior performance, you should ask the supplier to provide previous successful cases and then send someone to inspect its on-site sewage treatment effect. Although it may delay some time, it is indeed crucial.
3. Agreed execution standards for water discharge
Many units fail to specify the standard for sewage treatment in the contract when purchasing buried sewage treatment equipment, which can lead to disputes in the future when environmental protection requirements are raised. Due to different levels of treatment, the cost of sewage treatment can vary greatly.
4. Compare and sign contracts before purchasing, and specify the payment process
Choose several suppliers as references, and then compare their adopted processes, successful cases, prices, and other factors comprehensively.
Sign a formal contract and agree on the delivery, commissioning, and payment process before paying the deposit.
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