Method for improving excess activated sludge anaerobic fermentation hydrogen production efficiency

A technology of sludge anaerobic fermentation and residual activity, applied in the field of resource utilization of organic waste, can solve problems such as insignificant effect, achieve the effect of improving the degree of resource utilization, improving the hydrogen production capacity of fermentation, and improving efficiency

Inactive Publication Date: 2016-05-11
FUDAN UNIV
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Problems solved by technology

In the above reports, the hydrogen production was increased by means of pretreatment

Method used

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  • Method for improving excess activated sludge anaerobic fermentation hydrogen production efficiency
  • Method for improving excess activated sludge anaerobic fermentation hydrogen production efficiency

Examples

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Example Embodiment

[0012] Example 1

[0013] (1) Concentrate the remaining activated sludge of the sewage treatment plant, the concentrated sludge total suspended solids (TSS) 10.6g / L, volatile suspended solids (VSS) 6.9g / L, no other pretreatment process is required.

[0014] (2) Divide the concentrated sludge into two 500mL reactors. Each reactor is equipped with 400mL concentrated sludge. Adjust the initial pH of the sludge in the reactor to 10.06-10.14. After the oxygen environment, one reactor was fermented in a shaker at 37°C, and the other was placed in a shaker at 55°C for fermentation. The fermentation process lasted for 6 days. During the fermentation process, the pH of the sludge was kept constant by adding 4M NaOH with a pH automatic titrator. Control the alkaline condition to 10. The gas component content is determined by a gas chromatograph, and the gas volume is collected by a gas bag. After the reactor is running stably, the hydrogen production in the two reactors is shown in Table 1...

Example Embodiment

[0018] Example 2

[0019] (1) Concentrate the remaining activated sludge of the sewage treatment plant, the concentrated sludge total suspended solids (TSS) 10.6g / L, volatile suspended solids (VSS) 6.9g / L, no other pretreatment process is required.

[0020] (2) Divide the concentrated sludge into three 500mL reactors, each containing 400mL concentrated sludge, adjust the initial pH of the sludge in the reactor to 8, 9, 10, and use nitrogen Blow off creates an anaerobic environment. The reactors are all placed in a 55°C shaker for anaerobic fermentation with a hydraulic retention time of 6 days. During the fermentation process, 4M NaOH was added dropwise by a pH automatic titrator to always control the sludge in the three reactors to be 8, 9, and 10 respectively. During the operation of the reactor, the gas component content is measured by a gas chromatograph, and the gas volume is collected by a gas collecting bag. After the reactors are operating stably, the hydrogen output obta...

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Abstract

The invention belongs to the technical field of organic waste matter resource utilization, and particularly relates to a method for improving excess activated sludge anaerobic fermentation hydrogen production efficiency. The method comprises the steps that the pH in the whole process of excess activated sludge anaerobic fermentation hydrogen production is controlled to be about 10 all the time, the fermentation temperature is ensured to be within a high temperature range, the activity of homoacetogenic bacteria is sufficiently restrained, and the obtained hydrogen yield can reach 81 mL H2/g-VSS which is obviously higher than the excess activated sludge anaerobic fermentation hydrogen yield being about 25 mL H2/g-VSS reported at present. No pretreatment process needs to be carried out on activated sludge, the waste organic matter anaerobic fermentation hydrogen production level can be effectively improved, production of clean energy hydrogen is facilitated, and meanwhile resource utilization is carried out on excess activated sludge and other waste organic matter.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of organic waste, and in particular relates to a method for improving the efficiency of hydrogen production by fermenting residual activated sludge in a sewage treatment plant. Background technique [0002] With the development of the economy, more and more attention has been paid to energy issues. Traditional fossil energy is far from meeting people's requirements. Hydrogen energy, as a pollution-free and renewable ideal fuel, is considered to be the most attractive alternative energy source. Hydrogen only produces water after combustion, and has a high calorific value of combustion (142.35kJ / g), which is 2.75 times that of gasoline, 3.9 times that of alcohol, and 4.5 times that of coke. In addition, hydrogen is also an important chemical raw material in many industrial productions. Therefore, hydrogen production has become an important research direction. [0003] Among many hydro...

Claims

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Application Information

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IPC IPC(8): C12P3/00C02F11/04
CPCC02F11/04C12P3/00Y02P20/10
Inventor 罗刚万晶晶张士成
Owner FUDAN UNIV
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