Techase Gave Speeches in 2019 China Drainage Conference

In recent years, the concept of green development deeply rooted in the hearts of the people, with the number of wastewater treatment plants in China has increased significantly, the volume of wastewater treatment has increased significantly, and the wastewater treatment capacity has been improved rapidly. In this context, the nation has put forward policies such as the Water Pollution Prevention Action Plan (Water Ten) to set higher requirements for national wastewater treatment standards. Therefore, how to upgrade standard and improve the efficiency of wastewater treatment plants has become a hot issue.

In order to satisfy the technical requirements for the upgrading of wastewater treatment plants under high emission standards, on August 27, 2019, the "China Water Supply and Drainage" magazine cooperated with China Municipal Engineering North China Design and Research Institute, China Municipal Engineering Central and South China Design and Research Institute and more than ten institutes and the companies held the "2019 China Drainage System Quality Improvement Conference" in Ningbo, Zhejiang. Invited the leaders of the Ministry of Housing and Urban-Rural Development, the China Civil Engineering Society, the China Urban Water Supply and Drainage Association, and other experts in the national drainage industry to interpret industry policies, share typical success cases of wastewater treatment and upgrade, and discuss the future direction of technology development, build platform of new technologies, new processes and new equipment for wastewater treatment and upgrading introduction.

As an environmental protection company with a large number of independent research and development of advanced technology and plenty of practical experience, Mr. Liu Daoguang, Vice President of Techase and Director of Technology Center of Techase, gave a speech in the topic of “New Sludge Deep Dewatering Treatment System--Continuous Green Conditioning and Fast High Pressure Press”, With continuous green conditioning technology, fast high pressure filter press technology and equipment module integrates developed by Techase in many practical cases, we proposed an effective upgrading plan of sludge treatment. The speech caused great response and unanimous recognition from the participants.

The New Sludge Deep Dewatering Treatment System

Industry Background

As a concentrate of pollutants after wastewater treatment, sludge will cause more serious secondary environmental hazards if handled inadvertently. The four major problems of sludge dewatering are:

1.      The addition of iron salt and lime affects the sludge property. The powder injection seriously affects the actual quantity of the sludge treatment and limits the utilization of resources.

2.      Traditional press equipment has lower pressure and efficiency, higher energy consumption and costs of spare parts replacement, larger footprint.

3.      Low level of concentration and conditioning equipment integration. Cannot satisfy the industry dewatering requirements.

4.      The system is cumbersome, low level self-control, bad performance, and easy to produce stench.

Technology Introduction

The new sludge deep dewatering treatment system developed by Techase has been developed the technology new through the old. By continuous green conditioning of the sludge, adding powder-free chemicals to destroy the sludge cement structure and change the properties of the particles so that reducing the water holding capacity and filtration resistance of the sludge, and then effectively reduce the sludge. At the same time, the process adopts a fully automatic control system, coupled with high-pressure equipment such as super high pressure filter press, which can quickly reduce the moisture content of sludge to below 50%, effectively improving the quality and efficiency of sludge treatment. The modularization and integration of the equipment has greatly reduced the cost of maintenance and replacement of the equipment, thereby improving the efficiency of sludge treatment. Finally, aerobic composting and other technologies can be used to make the sludge be used in fields such as gardens to realize sludge resource utilization. The new sludge deep dewatering treatment system not only brings convenience to the subsequent sludge treatment, but also pay attention to the economic and environmental balance of the sludge treatment and disposal process.

Technical Process

The new sludge deep dewatering treatment system consists of four main parts: multi-plate screw thickening press, continuous sludge condition system, super high pressure filter press, high pressure plunger pump feeding system. Sludge is concentrated in multi-plate screw thickening press with PAM, and then placed in the sludge buffer tank; then pump into the continuous conditioning reactor for conditioning modification with adding powder-free agent; finally, feeding pump sends the sludge to the super high pressure filter press for pressing treatment, the sludge cake after dewatering can be transported or recycled.

Technical Advantages

1.2.5~10MPa high pressure press, low moisture content (50%~55%), high quality;

2. Integrate equipment and standardization to reduce civil construction requirements and effectively save equipment costs and land area;

3. Environment friendly liquid conditioning, no powder feeding, thereby no increased dry solid, which is conducive to subsequent resource utilization;

4. Reduce energy consumption by 30% and spare parts replacement costs by more than 50%;

5. Fully automatic control system, the system is easy to operate and maintain, and the site environment is neat and friendly. Operation management is simple and efficient;

Application Cases