Method for deactivating pathogen in mud of city waste water factory
A technology for urban sewage and pathogens, which is used in sludge treatment, biological sludge treatment, sewage/sludge fertilizer, etc. It can solve the problem of poor odor suppression effect, high temperature resistance requirements of equipment materials, and changes in physical and chemical properties. problems, to avoid easy blockage and uneven ventilation, stable and stable discharge properties, and convenient storage and transportation.
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Embodiment 1
[0019] First, the dewatered sludge from a sewage plant in Shanghai was sampled and analyzed. The basic properties of the sludge are: moisture content 80%, total organic matter 550g / kgDM, water-soluble total nitrogen 3.0g / kgDM, coliform value ≥ 24,000MPN / 100gDM. Then add sawdust with a moisture content of about 15% as a conditioner, and the added amount is 10-20% of the weight of the sludge. Put the above-mentioned materials into the dynamic aerobic fermentation bin with the ventilation system and the automatic stirring system (the air flows along the bin wall and is mixed into the fermentation material by the stirring shaft), and the condensate water diversion system is installed inside. During the initial fermentation, weigh 0.1-1.0‰ of the sludge weight of VT bacteria as the inducing agent, and dilute it 10 times with tap water for use. Then stir in both directions to make the VT bacteria evenly mixed into the material system. Turn on the air pump, control the ventilation...
Embodiment 2
[0021] Sampling and analysis of dewatered sludge from a sewage plant in Shanghai shows that the basic properties of the sludge are: moisture content 78%, total organic matter 600g / kgDM, water-soluble total nitrogen 3.5g / kgDM, coliform value ≥ 24,000MPN / 100gDM . After the first batch of sludge fermentation is completed, add new sludge for treatment, control the material reflux ratio at 20-60%, add wood chips with a moisture content of about 20%, and add 15-25% of the weight of the sludge as a conditioner , put the above materials into the dynamic aerobic fermentation bin with the ventilation system and the automatic stirring system (the air flows along the wall along the bin wall and is mixed into the fermentation material by the stirring shaft), and the condensate water diversion system is installed inside. Two-way stirring to make the materials fully mixed. Turn on the air pump, control the ventilation rate at 100-300L / min, and stir for 10-20 minutes every 5-10 hours. Disch...
Embodiment 3
[0023]Sampling and analysis of dewatered sludge from a sewage plant in Shanghai shows that the basic properties of the sludge are: moisture content 76%, total organic matter 450g / kgDM, water-soluble total nitrogen 4.0g / kgDM, coliform value ≥ 24,000MPN / 100gDM . After the first batch of sludge fermentation is completed, add new sludge for treatment, control the material reflux ratio at 20-60%, add wood chips with a moisture content of about 17%, and add 10-20% of the weight of the sludge as a conditioner , put the above materials into the dynamic aerobic fermentation bin with the ventilation system and the automatic stirring system (the air flows along the wall along the bin wall and is mixed into the fermentation material by the stirring shaft), and the condensate water diversion system is installed inside. Then stir in both directions to make the materials fully mixed. Turn on the air pump, control the ventilation rate at 100-300L / min, and stir directionally for 5-10 minutes ...
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