RU2009146473A - METHOD AND INSTALLATION FOR AEROBIC BIOLOGICAL WASTE WATER TREATMENT AND INTEGRATED ORGANOMINERAL FERTILIZER OBTAINED ON THEIR BASIS - Google Patents

Abstract

1. A method for aerobic biological wastewater treatment, including mechanical treatment of source water and separation of solid sludge from it, settling of wastewater in the primary settling tank and separating raw sludge from the primary settling tank, aerobic biological treatment, settling waste water and activated sludge in the secondary settling tank, the withdrawal of excess activated sludge from the secondary settling tank and the withdrawal of purified water, characterized in that the wastewater, before being fed to the primary settling, is averaged in terms of concentration and water flow rate, and then the clarified wastewater is fed to biological treatment and biooxidation, which are carried out in a circulation mode in for 1-1.5 hours, then for secondary sedimentation, post-treatment and disinfection, and the raw sludge and excess activated sludge, isolated after primary, secondary sedimentation and post-treatment, in a ratio of 1: 3 in terms of dry matter concentration, are sent to the joint enzymatic cavitation treatment to obtain complex udo slurry, while the sludge mixture is pre-activated by low-intensity cavitation for 2-3 s, during pumping it for treatment, and saturated with oxygen up to 8-10 mg / l during pumping for the formation of bacteria, and in the operating mode for 4 For 6 hours, the bacterial activation of the sludge mixture is carried out by low-intensity cavitation constantly, at a pressure of over 1 kg / m2, and the oxygen concentration is maintained according to the sinusoidal principle in the range of 10-20 mg / l, while the process of processing the sludge mixture proceeds in an exothermic mode, with the release of the optimal the amount of heat required for the process of processing a mixture of sludge waste

Claims (4)

1. A method for aerobic biological wastewater treatment, comprising mechanically treating the source water and separating solid sediment from it, settling the wastewater in the primary sump and separating the raw sludge from the primary sump, aerobic biological treatment, settling the wastewater and activated sludge in the secondary sump, the withdrawal of excess activated sludge from the secondary sump and the removal of purified water, characterized in that the wastewater, before being fed to the primary sedimentation, is averaged over concentration and water flow then the clarified wastewater is fed to biological treatment and biooxidation, which are carried out in a circulation mode for 1-1.5 hours, then to secondary sedimentation, tertiary treatment and disinfection, and the crude sludge and excess activated sludge recovered after primary, secondary sedimentation and tertiary treatment , in a ratio of 1: 3 in terms of the concentration of dry matter, sent to a joint enzyme-cavitation treatment to obtain complex fertilizer, while the sludge mixture is pre-activated by low intensive cavitation during 2-3 s, during pumping it for processing, and saturated with oxygen up to 8-10 mg / l during pumping for the formation of bacteria, and in the operating mode for 4-6 hours bacterial activation of the sludge mixture is carried out by low-intensity cavitation constantly, at a pressure of more than 1 kg / m ² , and the oxygen concentration is maintained on a sinusoidal basis in the range of 10-20 mg / l, while the process of processing the sludge mixture proceeds in an exothermic mode, with the release of the optimal amount of heat necessary for the process of processing the mixture silt about adka enzymes, which are proteinaceous catalysts for processing the mixture of sludge and derivatives enzymes forming chelates for transfer of heavy metals into harmless salts. 2. Installation for aerobic biological wastewater treatment, containing a device for the mechanical treatment of source wastewater for separating solid sludge, a primary sump, a secondary sump, a device for removing and supplying sludge, a device for supplying and discharging waste water and purified water, an aerotank, a device for physically mechanical processing, mixing devices, characterized in that it is made in the form of vertically mounted tank towers with a height of more than Hume with forced supply of wastewater and sludge, and on the averaging tank, a post-treatment module, a wastewater disinfection unit, as well as a dewatering agent and an enzyme-cavitation module for the joint processing of sludge, while the aeration tank is made in the form of two interconnected autonomous containers for biosorption and biooxidation, the averaging tank is connected to the primary sump , the primary sump is connected to the biosorption tank, the biooxidation tank is connected to the secondary sump, the primary sump, the secondary sump and the post-treatment module are connected to a cavitation module connected to the dehydrator, and a decontamination unit is installed at the outlet of the aftertreatment module, and the sludge supply device to the enzyme-cavitation module and wastewater in the biosorption and biooxidation tanks are made in the form of pipelines equipped with saturation devices at the junction with the tanks oxygen, and hydraulic pumps, on the suction line of which there are devices for creating cavitation of low intensity, and in the lower part of the enzyme-cavitation module biosorption capacities and biooxidation installed mixers, turbulators formed as to prevent sedimentation of active sludge and to provide agitation to the height of the containers modules. 3. Installation according to claim 3, characterized in that the disinfecting installation is made in the form of a biofilter. 4. Complex organic-mineral fertilizer containing sludge obtained during biological treatment of domestic water, characterized in that the sludge is a mixture of crude sludge and excess activated sludge, jointly processed according to the method of claim 1, taken at a ratio of components, wt.% : activated sludge 60-80 crude sediment 40-20