Integrated Sludge Deep Dewatering System

Zhengzhou Guoyan Environmental Protection Technology Co., Ltd. independently developed the "sewage concentration & Sludge activation and wall breaking technology & mechanical pressure filtration deep dewatering" process, using a unique combination of physical and chemical methods to change the water combination in the sludge, the sludge in the "bound water" is transformed into "free water", the water in EPS (extracellular polymer) is released, the cell body is broken, the intracellular water is released, and The modified sludge is directly dewateringd from 98% to below 60% through the Integrated Sludge Deep Dewatering Equipment. One-stop implementation of sludge reduction, stabilization, and harmless treatment. The Integrated sludge deep dewatering equipment operates without odor, low noise, no exhaust emissions, and is environmentally friendly.

The Integrated Sludge Deep Dewatering Equipment has compact structure and high degree of automation. It adopts PLC software control system to realize integrated and continuous control of sludge deep dewatering process. At present, the processes and technologies involved in the equipment have obtained 5 authorized invention patents, 31 utility model patents, 3 appearance patents, 17 software Copyrights.

Dewatering Process

The dewatering process of the Integrated Sludge Deep Dewatering Equipment of Zhengzhou Guoyan Environmental Protection Technology Co., Ltd. is divided into chemical flocculation modification, preliminary concentration of sludge, chemical and shear wall breaking, and deep pressure filtration dewatering. The detailed technological process is as follows: 
(1) The appropriate flocculant mixture is prepared in the fully automatic conditioner and medicine cabinet according to the sewage concentration. 
(2) The sludge with a water content of 96-98% is transported to the conditioning tank through the sludge pump, and the metering screw measures the flocculant mixture in the medicine tank into the conditioning tank and stirs evenly. The flocculant produces a compressed electric double layer, which makes the suspended particles in the sludge mixture lose stability, and the colloidal particles agglomerate to increase the particles to form flocs. 
(3) The modified sludge enters the sludge concentrator, the floc is separated from the filtrate, the filtrate is returned to the sewage treatment system, the floc adds sludge modifier, chemical conditioning and mechanical shear of sludge, change the water binding mode in sludge, the combination of water in the sludge converts the “bound water” in the sludge into “free water”, releases the water in the EPS (extracellular polymer), breaks the cell body, and releases the intracellular water. 
(4) The concentrated and modified sludge enters sludge depth dewatering equipment up and down two tension filter, through a series of regularly arranged rollers, the sludge is pressed and shearing force is produced by relying on the tension of the filter belt itself, and the water in the sludge layer is extruded out, so as to realize the deep dewatering of the sludge and obtain the sludge with water content below 60%.

Process diagram of The Integrated Sludge Deep Dewatering Equipment

Equipment Parameters

Remarks: The above data is for reference only. Due to different sewage components, there will be some deviations in relevant data.

Advantages of Guoyan Sludge Deep Dewatering Equipment

Comparison of several sludge mechanical dewatering methods

Cost analysis table of dewatering and disposal of surplus sludge

Remarks: The cost unit in the table is RMB, It is the cost of equipment operation in China. The above data is for reference only. Due to different sewage components, there will be some deviations in relevant data.

Technical Advantages

Performance and cost comparison of the three kinds of sludge dewatering equipment

Compared with the dewatering technology commonly used in China, it has the following advantages: 
1. It is universally adaptable according to local conditions. There is no need to select another site, project, or environmental assessment, and increase equipment in the sewage treatment plant according to local conditions. It is generally applicable to deep dewatering and centralized treatment projects in the plant. 
2. Economic and efficient. System structure is compact, high degree of automation, cold treatment does not require heat source, low investment, low energy consumption, low operating costs. Direct treatment of raw sludge to water content below 60%, realizes sludge reduction, stabilization and innocuous treatment.  
3. Environmental protection. Seamless connection with the sewage treatment plant, no odor, noise and exhaust gas pollution during the treatment process, pressure filtration water return sewage system treatment, good working conditions and environmental interface, Do not change the nature of the sludge itself, and do not lose the calorific value of the sludge . It has a wider space for resource utilization, and the social and environmental benefits are significant.