Application Case of Filter Press for Ink Printing Wastewater Treatment

2026-03-02

📋Project Overview
This project is a specialized solid-liquid separation treatment project for ink printing industry wastewater. It aims to efficiently separate the solid and liquid components of wastewater generated from ink cleaning and ink mixing processes in printing production, addressing the industry's pain point of the difficulty in settling and separating high-suspended solids and colloidal ink particles in the wastewater. The project is designed to handle an average daily volume of 15 tons of wastewater, equipped with a dedicated filter press system. It is set to operate for 8 hours a day, with a processing capacity of 1.87 cubic meters per hour, precisely matching the production waste generation rhythm. The filter chamber has a maximum single processing capacity of 120 liters, perfectly adapting to the wastewater's solid content range of 0.1% to 0.8% (1000-8000mg/L), achieving efficient retention of ink waste residue and compliance with discharge standards for the clear liquid.

⚠Wastewater Challenges

1. The ink wastewater contains a large amount of colloidal pigment particles and resin impurities, with strong adhesive suspended solids, poor natural sedimentation effect, and direct discharge can easily cause pipeline blockage and environmental pollution.
2. The solid content of the wastewater fluctuates greatly (1000-8000mg/L), requiring high adaptability and stability of the separation equipment.
3. The production space in the printing workshop is limited, and the equipment needs to be compact, easy to operate, and suitable for the intermittent waste generation characteristics of an 8-hour workday.

⚙Solution: Customized Filter Press System
In response to the characteristics of ink printing wastewater and the project's operational requirements, a customized filter press system was designed for the client, with core designs and configurations precisely matching the project parameters:

1. Customized core parameters: The effective processing volume of the filter chamber is 120 liters, with an hourly processing capacity of 1.87 cubic meters. Under full load operation for 8 hours, it can handle 15 tons of wastewater per day. The selection of filter plates and filter cloths is suitable for the retention and dehydration of viscous ink waste residue.
2. Corrosion-resistant material configuration: The filter plates are made of high-strength polypropylene material, resistant to slight corrosion from ink wastewater, extending the equipment's service life. The filter cloths are made of special anti-adhesive materials, easy to unload, and less prone to clogging, reducing the frequency of cleaning.
3. Operation-friendly design: The equipment is compact, with a small footprint, suitable for the workshop's production layout. It supports manual/semi-automatic operation switching, allowing intermittent feeding, filtration, and unloading within an 8-hour workday, without the need for 24-hour dedicated personnel, reducing labor costs.

💡Treatment Effect

1. Efficient solid-liquid separation: The filter press has an ink particle and suspended solid retention rate of over 99% in the wastewater, significantly reducing the suspended solid content in the clear liquid, which can directly enter the subsequent wastewater treatment process or be discharged up to standards, completely solving the problem of waste residue sedimentation.
2. Excellent dryness of waste residue: The separated ink filter cake has a low moisture content, good formability, no dripping or leakage, facilitating bagging, transportation, and standardized disposal of hazardous waste, significantly reducing the volume of waste residue and lowering disposal costs.
3. Strong adaptability to operating conditions: Within the wastewater solid content fluctuation range of 1000-8000mg/L, the equipment operates stably without clogging or leakage. It can precisely complete the treatment of 15 tons of wastewater within an 8-hour workday, perfectly matching the client's production rhythm.

👤Customer Value

1. Environmental compliance guarantee: Through efficient solid-liquid separation, the concentration of pollutants in the wastewater is reduced from the source, helping the client meet the requirements of the "Integrated Wastewater Discharge Standard" (GB8978-1996), avoiding environmental pollution risks.
2. Significant cost reduction and efficiency improvement: The equipment is adapted to the 8-hour workday of the workshop, with simple operation, no need for additional labor, and easy-to-clean filter cloths with a long service life, low consumable costs. The volume reduction of waste residue significantly lowers the transportation and disposal costs of hazardous waste.
3. High production compatibility: The compact design fits the space characteristics of the printing workshop, and the intermittent operation mode is highly compatible with the waste generation rhythm, not affecting the normal production process of the workshop, achieving the coordination of wastewater treatment and production operations.

✍Project Summary This project successfully addressed the industry's problems of difficult separation of viscous waste residue in ink wastewater, large fluctuations in solid content, and high requirements for equipment adaptability by customizing specialized filter presses precisely matched to the working conditions for the ink printing industry. It achieved efficient and stable solid-liquid separation of 15 tons of wastewater per day. The equipment, with its core advantages of "customized parameters, high adaptability, and low operation and maintenance costs", not only provided customers with compliant environmental protection solutions but also realized efficient synergy between production and wastewater treatment, becoming a typical application case of solid-liquid separation in ink printing industry wastewater.