Electrochemical-biological coupling excess sludge/digestion liquid closed-loop treatment method and treatment device
A technology for excess sludge and treatment methods, applied in the field of environmental protection, can solve problems such as increased system load, high cost, and impact on the operation of sewage treatment systems, and achieve the goal of preventing orifice clogging, ensuring aeration efficiency, and simultaneously removing with high efficiency and low energy consumption Effect
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Embodiment 1
[0086] figure 1 The specific structure of the electrochemical-biological coupling excess sludge / digestive liquid closed-circuit treatment device of the present invention is given, consisting of FNA in-situ generation pool 6, excess sludge FNA pretreatment pool 15, excess sludge treatment reactor 24 and digestive liquid The treatment reactor 35 is formed and equipped with a sludge storage tank 1 and an aeration return column 19 .
[0087] Wherein, the excess sludge treatment reactor 24 and the digestive liquid treatment reactor 35 are both made of plexiglass.
[0088] The excess sludge treatment reactor 24 includes two parts: a reaction zone and a sedimentation zone, and the digestive liquid treatment reactor 35 includes three parts: an aeration distribution chamber 41 , a reaction zone and a sedimentation zone. Among them, the inner diameter of the aeration distribution chamber 41 is 100mm, the height is 0.2m, and the volume is 1.5L; the inner diameter of the reaction zone is...
Embodiment 2
[0108] Take the excess sludge from the former Taiyuan Yangjiabao Sewage Treatment Plant as the excess sludge to be treated. The solid content of the excess sludge is 16%, TS=176.6g∙L -1 , VS=122.8g∙L -1 , VS / TS=0.69.
[0109] The granular sludge is taken from the highly efficient and stable granular sludge reactor (EGSB reactor) for treating urban domestic sewage, and is used to fill the excess sludge treatment reactor and the digestive liquid treatment reactor.
[0110] Micro-aerobic aeration to ensure FNA in-situ production of 0.06mg∙L in the tank -1 FNA (25°C, pH 6.8), the effluent from the FNA in-situ generation pool and the remaining sludge to be treated enter the excess sludge FNA pretreatment tank at the same time, and the pretreatment reaction is 4 hours (FNA pretreats the excess sludge). After pretreatment The excess sludge enters the excess sludge treatment reactor (at this time, the electrode is still in the state of acclimating and cultivating electricity-produci...
Embodiment 3
[0121] Take the excess sludge from the former Taiyuan Yangjiabao Sewage Treatment Plant as the excess sludge to be treated. The solid content of the excess sludge is 16%, TS=176.6g∙L -1 , VS=122.8g∙L -1 , VS / TS=0.69.
[0122] Granular sludge is taken from the highly efficient and stable granular sludge reactor (EGSB reactor) for treating urban domestic sewage to fill the remaining sludge treatment reactor and digestive liquid treatment reactor.
[0123] Micro-aerobic aeration to ensure FNA in-situ production of 0.15mg∙L in the tank -1 FNA (25°C, pH 6.8), the effluent from the FNA in-situ generation pool and the remaining sludge to be treated enter the excess sludge FNA pretreatment tank at the same time, and the pretreatment reaction is 4 hours (FNA pretreats the excess sludge). After pretreatment The excess sludge enters the excess sludge treatment reactor (the electrode is in the state of acclimating and cultivating electricity-producing functional bacteria externally (dir...
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