What methods are used for sludge treatment?
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As far as I know, the sludge these days is all treated using plate and frame filter presses before being transported away for incineration. Are there any other ways to deal with sludge! A friend of mine has recently developed a substance that may be able to consume sludge; he didn’t reveal the specifics. It is said that this substance can reduce the investment costs associated with sludge treatment by 60%. I would like to ask if such a substance is available on the market currently.
Oh, the so-called chemicals – in my opinion, they refer to microbial methods. They are available for purchase on the market these days. It depends on what type of sludge you have; different types of sludge require different kinds of chemicals
Reply 1# zhou780: What is the residual sludge from wastewater treatment? For the residual sludge resulting from the deep processing of crops, it is recommended to use the composting process – as it involves low treatment costs, thorough removal of pollutants, and good economic benefits. The disadvantages are the space required and the need for additional processing of organic fertilizer–only by meeting **organic fertilizer standards can one gain a foothold in the market and achieve profitability.
The sludge treatment method first depends on the properties of the sludge, as well as the local environment and economic benefits. Common traditional methods include sanitary landfilling, incineration, disposal in water bodies, and direct land use. In recent years, new methods have emerged: utilizing the waste heat generated in cement production to dry organic sludge, which is then burned as fuel; using the residues from this burning process as a substitute for clay as raw materials containing silicon and aluminum, thereby turning waste into resources ； Sludge undergoes anaerobic fermentation to produce biogas, which is then burned in the cylinders of gas internal combustion engines to convert chemical energy into mechanical energy. This process ultimately generates electricity and heat, enabling the harmless microbial treatment of the sludge to produce fertilizer. But **toxic, hazardous, and nuclear waste must be disposed of in accordance with regulations.**
If it is in a coking plant, the treatment method for this type of sludge is relatively simple: it can be directly transported to the coal yard and added to the blended coal, without any impact on the quality of that blended coal. This can be handled internally. If the wastewater treatment facility in question is located near a coking plant or thermal power plant, contact them to handle the sludge.
Another method is: centrifugal dewatering – superheated steam drying – landfilling or sending it to a power plant.
Additional question: I recently talked with a friend and discussed this medication in detail. This agent is primarily used for the treatment of activated sludge (the cost of treating dead sludge is relatively high). This agent has the functions of flocculation and reducing moisture content. During the test, the discharged activated sludge is mixed with chemicals, aerated for a period of time, and then compressed using plate and frame presses. Previously, it took 22 hours to dry 3 tons of sludge, with the weight of the dried sludge being 300 KG; now, it only takes 5 hours to dry 10 tons of sludge, with the weight of the dried sludge reaching 500 KG ； In the long run, cost savings are undeniable. Please everyone share your own opinions and views!
It can be turned into fertilizer. . . . . . . . .
At present, it is mostly buried after dehydration; the calorific value of sludge is too low, making incineration difficult. It would be good if it could be dried on a large scale or used as fertilizer in the future
The sludge is dried using the waste heat from boiler flue gas and then mixed with coal to be burned in the boiler
I heard that the sludge from breweries, after being dried, is burned together with coal