Method for fast aerobic granulation of flocculent sludge in sequence batch reactor

Abstract

The invention relates to a method for fast aerobic granulation of flocculent sludge in a sequence batch reactor and is characterized in that the height-to-diameter ratio of the reactor is 2-8:1, inoculated flocculent sludge is the conventional sewage secondary biologically processed active sludge, concentration of the sludge is 2000-5000mg/L and the inlet water is urban sewage; at a temperature of 15-37 DEG C, the sequence batch reactor adopts the operational mode with an operation method A and an operation method B alternatively working; the operation method A: water inflow-anaerobic agitation-aerobic aeration-precipitation-water discharge-standing; the operation method B: water inflow-anaerobic agitation-precipitation-water discharge-aerobic aeration-standing; one circulation according to the operation method B is added to every 5-15 circulations according to the operation method A; with the formation and the increase of the aerobic granular sludge and the increase of partical size of the sludge, the proportion of the circulation time according to operation method A to the circulation time according to operation method B is increased; the operation method B does not stop until the aerobic granulation is completely carried out on the sludge. The method of the invention has the advantages of shortening reactor starting time, improving operational efficiency and lowering operational cost.

Description

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AI Technical Summary

Benefits of technology

This patented process allows for quicker bacteria from wastewater treated through an activated slurry system (a type called SBR) can grow on surfaces like rice grains or other organisms quickly while also improving their ability to absorb nutrients when they break down them into simpler forms that could help reduce costs associated with treatments such as nitrogen removal processes.

Problems solved by technology

This patented technical problem addressed in this patents relating to the development of new type of advanced wastewater treatments called aerobicosis colloid systems are currently being studied worldwide. These systems require specific conditions like pH value, temperature, pressure, space availability, and other factors to achieve efficient treatment without increasing their size and requiring higher capital equipment expenses compared to traditional methods. Additionally, these techniques involve complicated operations involving multiple steps including activation/deposition processes, control of fluid volumes, adjusted feed rates, and agglomerations.