Aiming at the problem of thin mud cake and high moisture content, it can be solved from the following aspects:
1. Optimization of sludge conditioning
Adjusting polyacrylamide agent:
Check and adjust the mixing conditions of polyacrylamide agent and sludge, determine the dosing point and multi-point dosing.
Check the concentration of polyacrylamide agents and the added concentration to avoid too much agents to make the sewage sticky and the sludge shiny. The dosage is added from less to more until the appropriate dosage is found.
Improve sludge properties:
Increase sludge concentration efficiency and improve sludge dewatering performance.
Select the appropriate sludge conditioner according to the nature of the sludge, such as inorganic salt, coagulant, etc.
Two, strengthen the pressure filtration process control
Adjust filter press parameters:
Increase the pressure of the filter press to make the mud cake more compact.
Adjust the speed and pressure of the filter belt to extend the filtration time and improve the dehydration effect.
Regular maintenance of filter press:
Check whether the filter cloth is blocked or worn, and clean or replace the filter cloth in time.
Check whether the various parts of the filter press are operating normally, such as the feed pump, the press device, etc.
Three, the use of auxiliary dehydration technology
Secondary press process:
After the initial press, the filter cake is pressed twice to further reduce the water content.
Sludge drying technology:
Use heat or solar energy to dry the sludge and reduce the moisture content to a lower level.
Four, considering other factors
Sludge source and properties:
The sources and properties of sludge were analyzed, and different treatment strategies were adopted for different types of sludge.
Environmental factors:
Considering the influence of environmental factors such as ambient temperature and humidity on the sludge dewatering effect, appropriate measures should be taken to adjust.
Economic benefits:
When solving the problems of thin mud cake and high water content, it is necessary to consider the treatment cost, treatment efficiency and economic benefits.
In summary, to solve the problem of thin mud cake and high moisture content, it is necessary to start from many aspects, including optimizing sludge conditioning, strengthening the control of the press filtration process, adopting auxiliary dehydration technology and considering other factors. Through comprehensive policies, the dewatering efficiency and quality of sludge can be effectively improved, the moisture content can be reduced, and the sludge can be reduced and utilized as resources.