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Method for accelerating aerobic sludge granulation by aid of charcoal

An aerobic sludge and biochar technology, applied in chemical instruments and methods, biological water/sewage treatment, biological treatment devices, etc., can solve the problems of long aerobic granular sludge cultivation period and easy disintegration, and achieve The effect of abundant microorganisms inside the particles, low price, and broad market application prospects

Inactive Publication Date: 2016-03-23
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of biochar as a carrier for rapid cultivation of aerobic granular sludge that has the function of degrading refractory pollutants in view of the current problems such as too long aerobic granular sludge cultivation period and easy disintegration in the refractory biodegradable wastewater treatment system. A New Approach to Aerobic Granular Sludge

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  • Method for accelerating aerobic sludge granulation by aid of charcoal
  • Method for accelerating aerobic sludge granulation by aid of charcoal
  • Method for accelerating aerobic sludge granulation by aid of charcoal

Examples

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Embodiment 1

[0023] Embodiment 1: the cultivation of pyridine degraded aerobic granular sludge in SBR reactor

[0024] The present invention utilizes pyridine-degrading high-efficiency bacteria Rhizobiumsp.NJUST18 as a bioenhanced bacterial agent, and biochar as a crystal nucleus to quickly cultivate aerobic granular activated sludge. This example sets up a control experiment. The R0 reactor does not add biochar, and the R1 reactor adds biochar. The rest of the operating conditions are the same. Formation of granular sludge.

[0025] (1) Preparation of Rhizobiumsp.NJUST18 inoculum: Rhizobiumsp.NJUST18 was inoculated into inorganic salt medium MSM supplemented with 1 g / L pyridine, cultured on a shaker for 96 hours, and the bacterial liquid was centrifuged at 8000×g for 10 Minutes will obtain a dry weight of about 2g of thalline deposits as the inoculum of the SBR reactor.

[0026](2) Preparation of biochar: Screen rice bran through a 30-mesh standard sieve, place it in a nitrogen atmosphe...

Embodiment 2

[0035] Example 2: Degradation and short-range nitrification of pyridine by mature aerobic granular sludge

[0036] The waste water was prepared according to the composition of the simulated waste water containing pyridine in Example 1, and the initial concentration of pyridine in the SBR reactor was 1500 mg / L after water inflow. During the operation, the operation period is 8 hours, the water intake time is 5 minutes, the reaction time is 458 minutes, the settlement time is 2 minutes, the drainage time is 5 minutes, the idle period is 10 minutes, and the aeration rate is 100L / h.

[0037] The SBR reactor fed with biochar can realize the complete degradation of pyridine 3 days after start-up, and then the pyridine load gradually increases, and the pyridine degradation ability gradually improves, and nitrosation occurs 75 days after start-up. After 90 days of start-up, mature aerobic granular sludge appeared in the SBR reactor fed with biochar, and the pyridine with an initial co...

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Abstract

The invention discloses a method for accelerating aerobic sludge granulation by the aid of charcoal. The method includes that pyridine degradation bacteria Rhizobium sp. NJUST18 and ordinary activated sludge are used as compound inocula for the aerobic granular sludge, the charcoal is used as a crystal nucleus for the aerobic granular sludge in a sequencing batch reactor form, and quick forming of the pyridine degradation aerobic granular sludge can be promoted. The method has the advantages that the aerobic granular sludge with a pyridine degradation function can grow by the aid of pyridine which is a unique carbon source and a unique nitrogen source, granules have regular shapes and are good in sedimentation after the cultivated granular sludge is mature, reaction systems are high in sludge concentration, the high-concentration pyridine can be degraded and is subjected to synchronous nitrosation, and the cultivation time of the aerobic granular sludge for treating wastewater difficult to biodegrade can be effectively shortened.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and in particular relates to a method for accelerating aerobic sludge granulation by utilizing biochar. Background technique [0002] Aerobic granular sludge is a special form of biofilm growth and a new way of microbial "self-flocculation". In this system of microbial flocculation and proliferation, many microorganisms are wrapped in the network framework by extracellular polymers. Due to the strong metabolic complementarity among various microorganisms, the degradation of complex organic matter can be achieved, and it has the ability to withstand high Organic load, tolerance to toxic substances and other characteristics. At the same time, aerobic granular sludge technology, as a new wastewater treatment technology developed on the basis of activated sludge technology, can overcome many problems in the traditional activated sludge process, such as the large size of the r...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F3/30
CPCC02F3/1263C02F3/302C02F2003/001C02F2003/003C02F2101/38C02F2203/004C02F2305/06Y02W10/10
Inventor 沈锦优张德锦吴施婧刘晓东王连军侯成李旺孙秀云韩卫清李健生
Owner NANJING UNIV OF SCI & TECH
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