How to reduce sludge and recycle sludge?
With the continuous development of urbanization, the length of the municipal pipe network is gradually increasing and the cleaning and maintenance of the municipal pipe network is continuously standardized. The amount of sludge in the drainage pipeline is also increasing. The society pays more and more attention to its treatment and disposal. According to the principle of "reduction, harmlessness and recycling", it is of great significance to realize the reduction and resourceful compr
With the continuous development of urbanization, the increasing length of municipal pipe network and the strengthening of cleaning and maintenance standards, the amount of communication sludge in drainage pipes is also increasing, the society attaches more and more importance to its handling of the problem. According to the principle of"Reduction, innocuity and resourcefulness", it is very important to realize the comprehensive disposal of sludge reduction and resourcefulness.
The physical and chemical properties and characteristics of sludge determine its disposal outlet. In order to realize the comprehensive treatment of sludge reduction and resource utilization, the particle size of sludge was classified, and the corresponding disposal outlet was selected according to the physical and chemical characteristics and characteristics of each particle, such as:
(1) the coarse material (particle size > 10mm) can be transported as construction waste for landfill treatment.
(2) the content of organic loss from ignition is less than 3% , which can be recycled as low-grade building materials.
(3) organic grid slag (2 ~ 10mm) can be used for sludge composting or as a carbon source in wastewater treatment plant to supplement to biochemical treatment unit.
(4) the mineralized material (particle size < 0.2 mm) can be used for reclamation of municipal road roadbed backfilling sand construction.
This kind of reduction and resource-based comprehensive disposal does not adhere to a single disposal approach. It can be seen that the particle size fractionation of each level in sludge is a necessary condition for subsequent reduction and comprehensive disposal of resources, which can reduce soil pollution and landfill volume, to realize the recycling of gravel and fine sand in the sewage sludge, so that the organic matter in the sludge can be returned to the Sewage Treatment and the ecological environment can be protected.
Sludge is a potential resource with great value in utilization. It is a hot developing direction of the industry to treat and dispose the communication sludge and to realize the reduction and resource utilization. The skid-mounted sludge treatment equipment developed by DESEN environment is a set of soil remediation equipment with scientific technology combination. The equipment itself and the combined process meet the requirements of the reduction treatment process of communication sludge, scrubbing, sieving and grading the communication sludge according to the particle size standard, and effectively separating the organic matter and inorganic matter in the sludge, the separation rate of organic matter (floating matter) reaches 50-70% , which effectively realizes the innocuity, resource and reduction of sewage sludge treatment and disposal.
