A method for advanced treatment of cassava alcohol waste liquid anaerobic effluent

A technology of advanced treatment and cassava alcohol, which is applied in the field of sewage purification and treatment, can solve the problems of high content of soluble organic substances, achieve the effects of improving treatment efficiency and energy recovery rate, good application and research prospects, and low cost

Active Publication Date: 2020-04-17
JIANGNAN UNIV
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Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a method for the advanced treatment of cassava alcohol waste liquid anaerobic effluent in view of the high content of soluble organic matter in the effluent of the first-stage high-temperature CSTR reactor. The method adopts an upflow anaerobic Oxygen sludge bed reactor UASB, inoculated with granular sludge for mesophilic continuous anaerobic fermentation to produce biogas

Method used

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  • A method for advanced treatment of cassava alcohol waste liquid anaerobic effluent
  • A method for advanced treatment of cassava alcohol waste liquid anaerobic effluent
  • A method for advanced treatment of cassava alcohol waste liquid anaerobic effluent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] use figure 1 The shown upflow anaerobic sludge bed UASB reactor device is made of all-glass material with a volume of 9.5L, and the actual effective reaction volume is 7.2L. The reaction temperature is 35°C, the inlet water enters from the bottom of the reactor through a pump, the biogas produced by the reaction is separated by a three-phase separator, and collected from the gas discharge pipe to the gas collecting bag. The outlet water and inlet water are refluxed in a ratio of 2:1. The outside of the reactor is a glass interlayer, which uses a water bath heating method to maintain the temperature at 35°C.

Embodiment 2

[0034] Example 2 Changes in COD of UASB reactor effluent under different operating conditions

[0035] The operating efficiency of UASB reactor is as figure 2 Shown. After one-stage CSTR anaerobic reactor treatment, the effluent is diluted according to the set corresponding hydraulic retention time and volume load, and then enters the UASB reactor by pump for anaerobic fermentation. The effluent is subjected to anaerobic fermentation at 3kgCOD / (m 3 .d) Run for 10 days under load, and increase to 5kgCOD / (m 3 .d) Run for 15 days, then increase to 7kgCOD / (m 3 .d) Run 33d. After nearly 60 days of treatment, the final reactor operating load is 7kgCOD / m 3 .d, the concentration of TCOD and SCOD in the effluent are 1327.9 and 551.2 mg / L, respectively, and the removal rate of TCOD reaches 83.0%-84.1%. In the process of treatment, the concentration of organic matter in the effluent increases as the volume load of the influent increases.

[0036] Such as image 3 As shown, the daily biogas ...

Embodiment 3

[0040] Example 3 Kinetic model of biogas production rate of CSTR anaerobic reaction under different volume loads

[0041] The operating parameters of the reactor are controlled according to the following kinetic model:

[0042] The establishment of the kinetic model is based on the conservation of materials, as follows:

[0043]

[0044] In the above formula:

[0045] V R Is the volume of the reactor (L); m o Is the amount of material added (L / d); C 0 Is the concentration of organic substances in the dosing material (g / L); c is the concentration of organic substances in the reactor (g / L); r(c) is the rate at which the substrate is digested (g / Ld); y is the unit raw material Gas production rate (L / gTCOD); y m Is the largest unit raw material gas production rate (L / gTCOD);

[0046] According to the first-order reaction kinetics:

[0047]

[0048] Where k is the first order reaction rate (d -1) .

[0049] According to HRT=m 0 .VR, under steady state conditions, can be obtained by the above ...

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Abstract

The invention discloses an advanced treatment method of anaerobic effluent of cassava alcoholic waste liquor, and belongs to the technical field of wastewater purification treatment. Inoculated sludge is moderate-temperature anaerobic granular sludge in a food processing factory, an upflow anaerobic sludge blanket (UASB) is used as a reactor, the sludge is subjected to continuous anaerobic treatment under the condition of a moderate temperature of 35 DEG C, the fermentation property of the sludge is analyzed, meanwhile, a kinetic model is built to provide optimizing operation parameters for the fermentation process, and a reliable operation management theoretical guidance is provided for treatment of actual cassava alcoholic waste liquor. Anaerobic deep fermentation of the wastewater can produce a lot of marsh gas, the waste liquor of the first-stage high-temperature anaerobic effluent of cassava alcohol can be effectively treated, and detoxifiton, reduction and recycling of the high-concentration organic wastewater are achieved. The method is simple and easy to operate, high in stability, and capable of effectively treating the waste liquor of the first-stage high-temperature anaerobic effluent of the cassava alcohol.

Description

Technical field [0001] The invention relates to a method for advanced treatment of anaerobic effluent of cassava alcohol waste liquid, and belongs to the technical field of sewage purification treatment. Background technique [0002] According to related reports, cassava fuel ethanol will play an increasingly important role in the future energy allocation process. Because the roots and stems of cassava contain a large amount of carbohydrates and starches, a large amount of organic wastewater is produced during the production of ethanol and alcohol, which contains a large amount of renewable nutrients. It is a kind of non-toxic high-concentration organic wastewater. In the production process of cassava fuel ethanol, about 15 tons of alcohol wastewater can be discharged per ton of alcohol. This kind of wastewater has the characteristics of high solid content, high COD and low pH. It is a type of industrial high-concentration organic wastewater that is difficult to degrade. It will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F103/36
CPCC02F3/2846C02F2103/36Y02E50/30
Inventor 赵明星廖家林卞志明阮文权
Owner JIANGNAN UNIV
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