Overview of wastewater treatment in food factories

The food industry has a wide range of raw materials and a wide variety of products, and the processing requires a large amount of water, resulting in a lot of waste being discharged as sewage. The amount and quality of wastewater discharged vary greatly.

The main pollutants in food factory wastewater include solid substances floating in the wastewater, substances suspended in the wastewater, and acids, alkalis, salts, sugars, etc. dissolved in the wastewater. The characteristics of food industry wastewater are high organic matter and suspended solids content, easy to decompose, and generally not highly toxic. For the treatment of wastewater in food factories, what is needed is a treatment process with low investment, low operating costs, stable operation, good treatment effect, and easy operation and management. For many years, Dongguan Gaoda Environmental Protection has implemented the policy of scientific management, innovative development, honesty and trustworthiness, and maximized the satisfaction of customer needs.

Principles and processes of wastewater treatment in the food industry

In food wastewater treatment, there is a large amount of organic matter and oxygen consumption is a characteristic of organic wastewater. Therefore, biochemical methods are often used for the treatment of organic wastewater. The organic matter discharged from food industry wastewater into water bodies undergoes aerobic decomposition into inorganic substances under the condition of aerobic bacteria and sufficient oxygen supply. This decomposition process is called biological oxidation. The essence of aerobic biological treatment is to use artificial measures to cultivate microorganisms in water and inject sufficient oxygen to promote the biochemical decomposition process of organic matter. The biological aerobic treatment of organic wastewater has the following advantages: fast biochemical reaction speed, simple aerobic digestion equipment, low infrastructure investment, stable operation and simple operation. Aerobic treatment is generally suitable for treating medium to low concentration organic wastewater.

The aerobic biological treatment methods for organic wastewater mainly include activated sludge method, biofilm method, aeration pond method, and membrane bioreactor method.

Food industry wastewater treatment: 1. Activated sludge process: The general process of ordinary activated sludge process is that the wastewater first passes through the primary sedimentation tank, and some suspended particles are removed in advance to reduce the workload of activated sludge. After the BOD is reduced to a certain degree, the treated wastewater and some activated sludge flow into another container, namely the secondary sedimentation tank. The clean water after removing the activated sludge can be discharged. Due to the continuous removal of sludge from the aeration tank, a portion of the sludge needs to be returned to the aeration tank to maintain the concentration of activated sludge in the tank. 2. Biochemical treatment is one of the most important processes in organic wastewater treatment systems. In the wastewater treatment of the food industry, biological treatment processes can be divided into aerobic processes, anaerobic processes, stabilization ponds, land treatment, and various combination processes formed by the combination of the above processes. Food wastewater is organic wastewater, and biological treatment is the main secondary treatment process aimed at degrading COD BOD5。

3. Membrane bioreactor method: The membrane bioreactor completes the biochemical and physicochemical treatment of wastewater in one tank, greatly improving the efficiency of sludge water separation. Due to the increase in activated sludge in the aeration tank and the emergence of specific bacteria in the sludge water, the biochemical reaction rate is also increased. This process can greatly reduce the production of excess sludge, and the treated effluent is clear and transparent purified water, with much better effluent quality than other sewage treatment processes.

The physical treatment methods used for food industry wastewater treatment include screening, skimming, adjustment, precipitation, and air flotation. These five processes are mostly used for pretreatment or primary treatment, while centrifugal separation, filtration, and microfiltration are mainly used for deep treatment.

Characteristics of food wastewater treatment equipment

1. The food wastewater treatment equipment has a complete process, mature technology, large treatment capacity, stable and reliable functions, occupies less land, and reduces investment costs.

2. The equipment has a high degree of automation, simple process and equipment structure, easy to use, does not require dedicated personnel to be on duty, and only requires regular maintenance of the equipment and accessories.

3. The equipment has a long service life, stable operation, high processing efficiency, and can eliminate sludge expansion.

4. The equipment is not limited by the amount of sewage, and is flexible and adaptable. It can be used individually or in combination with multiple devices, providing convenience for later expansion and standard improvement.

5. The equipment system generates less sludge, avoiding pollution transfer, saving operating costs and sludge treatment costs.

6. The equipment saves floor space and can be arranged underground or semi underground according to the site conditions.

Price parameters of sewage treatment equipment

Scope of Equipment Application

Hotels, restaurants, sanatoriums, hospitals; Residential communities, villages, and towns; Stations, airports, seaports, and ships; Various industrial organic wastewater similar to domestic sewage, such as factories, mines, troops, tourist attractions, scenic spots, etc.

After sales service of Gaoda Environmental Protection Technology Co., Ltd.:

After the equipment production is completed, our company will transport the equipment to the customer's location according to the contract requirements, and send our professional engineers to the engineering site to guide the installation. After the installation is completed, debugging will be carried out until the emission standards are met.

After the completion of the equipment, we provide a one-year free warranty period for its normal operation. During the warranty period, we provide free technical service support to users. After the warranty period expires, we only charge a cost fee for engineering maintenance services and equipment repairs.

During the warranty period, if the equipment operation and management personnel cannot eliminate the fault, our company will provide an emergency plan within 2 hours after receiving the customer's fault notification. Within 24 hours within the province (48 hours outside the province), personnel will arrive at the scene to handle the fault.

During the free warranty period, we will conduct periodic follow-up visits to assist equipment operation and management personnel in carrying out equipment management work.

After the completion of the project, we will provide technical training to the user's operators, including the working principle of the equipment processing system, process flow, daily operating procedures, common fault troubleshooting, etc., until the end of the training.

Gundam Corporation holds a leading position and competitive advantage in the industry. Dare to challenge and continue to develop. As a professional equipment manufacturing company, we have the ability to provide you with the highest quality products and services based on development and design. Let's work hand in hand, cooperate sincerely, and create a beautiful blue sky together!