Sludge dewatering and concentration treatment basic process

Abstract

The invention discloses a sludge dewatering and concentration treatment fundamental technology. The sludge dewatering and concentration treatment fundamental technology comprises the steps of a first-grade wastewater treatment core process, middle assisting, a second-grade wastewater treatment core process and post assisting, controlling is conducted on the pH value based on all processing point water bodies in an overall process, and all parameters are set according to requirements of water inflow and outflow indexes. According to the sludge dewatering and concentration treatment fundamental technology, the advantages of ion separation medicament in practical application for an applicant can be fully guaranteed, and the representative advantages that the quantity of reagent (10-300 g per ton of water) is less, dilution is not needed for direct solid state dosage, buffering is not needed for wastewater real-time treatment (the reaction speed ranges from 3 min to 15 min), water content removal rate reaches up to over 80 percent, all national wastewater treatment emission standards can be accorded to and met, treated water is colorless, odorless and free of secondary harmful chemicals, and sludge produced through flocculation is low in moisture content (smaller than 35 percent), free of odor and adhesion and the like.

Description

technical field [0001] The invention relates to the field of sludge treatment techniques and methods, in particular to a basic technique for sludge dehydration and concentration treatment. Background technique [0002] In recent years, with the development of population and economy, environmental problems have become increasingly serious, and our government and people have attached great importance to them. Among them, the problem of more and more sludge and sludge odor in the process of sewage treatment has become a key problem among many environmental problems. There is almost no land available for sludge landfill, which affects the overall ecological environment. The main source of sludge is produced in the treatment system of domestic sewage and industrial sewage, among which domestic sludge bears the brunt, and the amount is very large, with an average of one kilogram of sludge produced per ton of sewage. At present, sludge treatment is mainly divided into three techni...

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Problems solved by technology

At present, sludge treatment is mainly divided into three technical methods: physical method, chemical method and biological method; most of the physical methods use centrifuges, plate and frame filter presses and other methods, which consume a lot of energy and require a lot of electric energy; while chemical methods Usually, polymer oxidants and chemical flocculants (such as polyacrylamide (PAM) or polyaluminum chloride (PAC)) are added to the sludge; however, chemical flocculants have a large dosage, good water dilution and Proportioning, the need to put a large amount of alkali to break the cell wall, long-term static sedimentation, non-stirring, generation of secondary chemical hazardous substances and high water content of the sludge, inevitably have relatively large problems in the actual process and operation ; For example, the flocculation speed is slow, the sludge buffering facilities occupy a large area, the waste of water resources and land is relatively serious, and the secondary pollution to the water and sludge environment is caused. The bigger problem is that the use of chemical flocculants will cause it Sludge treatment brings great troubles. Not only does it require a lot of electric energy to drive the sludge filter press or centrifuge, but also the sludge smells very smelly, and the moisture content of the sludge after treatment is still as high as 70% or more.

This is also the reason why although the scale of urban sludge treatment plants in my country is large, they are still powerless to deal with the treated sludge.

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