50T/D Food Industry Wastewater Treatment Carbon Steel Wastewater Management System

50T/D Food Sewage Treatment Equipment Carbon Steel SQSP-50

1, Introduction to Food Sewage Treatment Equipment Engineering
A certain food industry limited company is a food processing enterprise. Throughout the entire production process, a large amount of wastewater will be generated. The wastewater mainly contains organic substances and suspended solids. If discharged directly into the receiving water body, it will cause eutrophication of the water quality, causing excessive proliferation of plankton and algae, leading to water quality deterioration. Its aerobic characteristics will reduce the dissolved oxygen in the water body, leading to the death of fish and other organisms, and affecting the living environment of surrounding areas. From the perspective of protecting the environment and the long-term development of enterprises themselves, treating wastewater discharged during the process and ensuring that it meets the discharge standards has both economic and social benefits.
Shandong Shangqing Environmental Protection Technology Co., Ltd. has formulated this wastewater treatment engineering design plan in strict accordance with environmental standards and in accordance with the characteristics and treatment requirements of the company's production wastewater. The new sewage treatment station has a processing capacity of 12m3/d. The effluent quality after sewage treatment meets the Class A discharge standard in the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" GB18918-2002.

2, Design basis for food wastewater treatment equipment
◆ The first level A discharge standard in the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" GB18918-2002
Environmental Law of the People's Republic of China (December 1989);
◆ Water Pollution Prevention and Control Law of the People's Republic of China (May 1984);
Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste (October 1995);
Regulations on the Administration of Environmental Protection for Construction Projects (State Council Order No. 253, November 1998);
Regulations on Environmental Protection Design of Construction Projects (Guo Huan Zi (87) No. 002).

3, Design standard for food wastewater treatment equipment
◆ "Code for Design of Outdoor Drainage" revised in 2006 (GB500014-2006);
◆ "Practical Code for Building Water Supply and Drainage" (GBJ15-88);
Code for Design of Building Foundation (GBJ147-89);
Code for Design of Concrete Structures (GBJ17-88);
Code for Design of Industrial and Civil Power Supply Systems (GB50052-95);
Code for Structural Design of Water Supply and Drainage Engineering;
Code for Design of Low Voltage Distribution Equipment and Lines (GB50054-92)
Technical Code for Electrical Design of Buildings (GBJ10-83)
Hygienic Standards for the Design of Industrial Enterprises (TJ36-79)
◆ "Approval Standard for Building Structure Design" (BGJ68-84)
Relevant information provided by the factory:
◆ Relevant information on domestic wastewater from the same industry, raw materials, and production processes.

4, Design principles for food wastewater treatment equipment
Design strictly in accordance with relevant national design specifications, standards, and requirements, implement national environmental protection policies, comply with relevant national and local regulations, specifications, and standards, and discharge sewage after treatment to meet standards.
◇ The wastewater treatment process is closely combined with the production process, and targeted selection of processes that are suitable for the characteristics of the wastewater in the factory; Strive to achieve a reasonable system layout, save investment, and facilitate operation and management, fully leveraging the benefits of engineering investment.
◇ Implement the design principle of balancing economy and reliability, reasonably reduce project costs and operating costs, improve project quality, and strive to improve the reliability and stability of the system.
◇ Combining the actual local situation and objective conditions, adapting to local conditions, actively and steadily adopting advanced technology and optimized and concise processes, so that the design, construction, and operation management of the project can achieve the expected goals.
The engineering equipment adopts high-quality products and is selected based on the principles of safety, energy conservation, convenient maintenance, and safety and energy conservation to reduce operating costs.
◇ Fully consider the convenience of engineering operation, management, and maintenance; The layout of each structure is compact, while considering the mutual influence of pipeline laying and structure construction slotting, leaving a certain distance between the structures.
◇ Wastewater and sediment treatment fully utilizes local favorable natural conditions, and the connecting pipes and channels between various structures should be as simple and convenient as possible to avoid twists and turns, reduce water head loss, and reduce energy consumption. The vertical elevation design of the factory area should strive to achieve a balance of earthwork throughout the site.
◇ Try to achieve comprehensive utilization and organically combine environmental, social, and economic benefits. The overall layout of the factory area should be as compact and aesthetically pleasing as possible, within the planned land area to ensure safe, hygienic, and stable operation of the project.
5, Design indicators for food wastewater treatment equipment
1. Inlet water quality and quantity
According to similar sewage data, the designed water volume is 50m3/d:

2. Effluent quality
According to the owner's requirements, the wastewater from the factory after treatment should meet the first level A standard specified in the national standard of the People's Republic of China "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002), as follows:

6, Specific process flow of food wastewater treatment equipment
Based on the principles of good treatment effect, low operating cost, and low investment, the specific process flow of this design is as follows:

7, Process Description of Food Sewage Treatment Equipment
Water treatment has been widely applied, with the following main characteristics:
1. After passing through the grid, domestic sewage flows into the regulating tank by itself. Due to the significant changes in the water quality and quantity of the sewage, it needs to be regulated through the regulating tank for water quality and quantity.
2. The anaerobic/aerobic process is the simplest enhanced biological phosphorus removal process composed of anaerobic and anaerobic zones. The reflux activated sludge is returned to the anaerobic zone. Under anaerobic conditions, the phosphorus accumulating bacteria in the sludge are suppressed and release phosphate in the body, generating energy to absorb and rapidly degrade organic matter, and convert it into PHB (poly β Hydroxybutyl acid) is stored. Then the mixed liquid enters the aerobic zone, and the PHB stored by the phosphorus accumulating bacteria during the degradation of aerobic conditions generates energy for cell synthesis and phosphorus absorption, forming high concentration phosphorus containing sludge that is discharged from the system along with the remaining sludge, thereby achieving the goal of biological phosphorus removal.
Under conditions with sufficient sludge age, BOD5 is degraded in an aerobic tank while also completing nitrification reaction.
On the system, this process is the simplest phosphorus and nitrogen removal process. Under the conditions of alternating anaerobic, anaerobic, and aerobic operation, it can inhibit the proliferation of filamentous bacteria, overcome sludge bulking, and make the SVI value generally less than 100, which is conducive to sludge water separation. Only agitators are installed in the anaerobic and anaerobic sections. Due to the strict separation of anaerobic, anaerobic, and aerobic zones, it is beneficial for the reproduction and growth of different microbial communities, resulting in good nitrogen and phosphorus removal effects.
3. The biological contact oxidation (aerobic tank) method involves the installation of fillers in the biological tank. Due to the large specific surface area of the fillers and the good oxygenation conditions in the tank, the biomass per unit volume in the biological contact oxidation tank is higher than that in the activated sludge aeration tank and biological filter tank. Therefore, the biological contact oxidation tank has a high volumetric load; By utilizing the nitrifying bacteria and denitrification bacteria cultivated in the system, the goal of removing carbon containing organic matter and ammonia nitrogen in wastewater is achieved. Compared with adding a denitrification tertiary treatment system after ordinary activated sludge treatment, it has the advantages of low infrastructure investment, low operating costs, low power consumption, and less land occupation.