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

A sequencing batch reactor and flocculent sludge technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc. Efficiency affects issues such as effluent discharge outlets, and achieves the effects of stable granular sludge form, reduced operating costs, and improved operating efficiency and treatment capacity.

Inactive Publication Date: 2011-02-02
INST OF HYGIENE & ENVIRONMENTAL MEDICINE PLA ACAD OF MILITARY MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for rapid aerobic granulation of flocculent sludge in a sequencing batch reactor, characterized by the following features:

[0026] 1) Reactor and medium. The reactor is in the shape of a barrel, with an effective volume of 20 liters and a height-to-diameter ratio of 4:1. The flocculent sludge is inoculated with conventional sewage secondary biological treatment activated sludge, and the sludge concentration is controlled at 2000mg. / L; urban sewage is used as influent water, and water quality testing is carried out according to the national standard method stipulated in "Water and Wastewater Monitoring and Analysis Methods (Fourth Edition)" compiled by the State Environmental Protection Administration and published by China Environmental Science Press, and the concentration is calculated by COD 150-250mg / L, ammonia nitrogen 20-30mg / L, total nitrogen 25-35mg / L, total phosphorus 2-5mg / L.

[0027] 2) Operation mode, the above-mentioned sequencing batch reactor ad...

Embodiment 2

[0033] A method for rapid aerobic granulation of flocculent sludge in a sequencing batch reactor, characterized by the following features:

[0034] 1) Reactor and medium. The reactor is in the shape of a barrel, with an effective volume of 8 liters and a height-to-diameter ratio of 8:1. The flocculent sludge is inoculated with conventional sewage secondary biological treatment activated sludge, and the sludge concentration is controlled at 3000mg. / L; using the effluent of the primary sedimentation tank of a certain urban sewage treatment plant as the influent water, according to the national standard method stipulated in "Water and Wastewater Monitoring and Analysis Methods (Fourth Edition)" compiled by the State Environmental Protection Administration and published by China Environmental Science Press Water quality test, COD concentration is 150-200mg / L, ammonia nitrogen 20-30mg / L, total nitrogen 25-40mg / L, total phosphorus 1-3mg / L.

[0035] 2) Operation mode, the above-ment...

Embodiment 3

[0042] A method for rapid aerobic granulation of flocculent sludge in a sequencing batch reactor, characterized by the following features:

[0043] 1) Reactor and medium. The reactor is in the shape of a barrel, with an effective volume of 10 liters and a height-to-diameter ratio of 2.5:1. The flocculent sludge is inoculated with conventional sewage secondary biological treatment activated sludge, and the sludge concentration is controlled at 5000mg. / L; urban sewage is used as influent water, and water quality testing is carried out according to the national standard method stipulated in "Water and Wastewater Monitoring and Analysis Methods (Fourth Edition)" compiled by the State Environmental Protection Administration and published by China Environmental Science Press, and the concentration is calculated by COD 150-300mg / L, ammonia nitrogen 30-35mg / L, total nitrogen 40mg / L, total phosphorus 2-4mg / L.

[0044] 2) Operation mode, the above-mentioned sequencing batch reactor is ...

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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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Claims

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Application Information

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Owner INST OF HYGIENE & ENVIRONMENTAL MEDICINE PLA ACAD OF MILITARY MEDICAL
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