Cassava alcohol wastewater biological treatment technology

A biological treatment, cassava alcohol technology, applied in food industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as mixing difficulties, blockage, blockage of aeration system, etc., and achieve economical and social benefits are obvious, the treatment process is simple, and the effect of reducing COD content

Inactive Publication Date: 2015-12-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, because cassava residue is particularly easy to precipitate, it will cause poor dehydration effect of belt filter press and plate and frame filter press, and damage filter bags, filter cloth, etc.
[0008] 3. Cassava residue is difficult to biodegrade
[0010] 4. Cause reactor silting, mixing difficulty, water inlet blockage
[0011] According to the characteristics of cassava slag mentioned above, once the cassava slag enters the reactor, it will be difficult to come out automatically, which will cause the effective vol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of biological treatment process of cassava alcohol waste water of the present embodiment, comprises the following steps:

[0041] (1) Filtration treatment

[0042]Distill the waste water first, put part of the distilled waste water into the mixed treatment tank, and the rest of the distilled waste water passes through the grit chamber, and install a 150 to 160-mesh rotary stainless steel filter screen, a sand-water separator and a sand chamber in the grit chamber. The slag-water separator is used to filter waste water through the above-mentioned separator; the sand-water separator discharges the sediment deposited in the grit chamber into the sand collection hopper, and a filtrate pipe is arranged on the sand collection hopper, and the filtrate is discharged into the sump; the slag-water separator The large pieces of cassava slag deposited in the grit chamber are discharged into the slag collecting hopper, and a filtrate pipe is arranged on the hopper, and the fi...

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PUM

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Abstract

The invention belongs to the technical field of wastewater treatment, and discloses a cassava alcohol wastewater biological treatment technology. The technology comprises the following steps: distilling wastewater, filtering distilled wastewater through a sand basin to remove silt and cassava residues, treating under stirring and aerating conditions for 5-6h, and adjusting the pH value to 6-6.5; carrying out primary anaerobic treatment at 58-62DEG C, screening, carrying out secondary anaerobic treatment at 38-42DEG C, allowing obtained wastewater to enter a membrane bioreactor, and carrying out nitrogen removal treatment and mud-water separation; allowing separated wastewater to enter an aerobic tank, and carrying out aerobic treatment; and carrying out advanced treatment on outlet water through a nanofiltration device, or adding a water purifier and powdery active carbon and treating through a down-flow continuous fixed bed in order to obtain standard meeting discharged water or reuse water. The technology has the advantages of simplicity, good treatment effect, low comprehensive cost, and realization of harmony and unification of environment benefits and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a biological treatment process for cassava alcohol wastewater. Background technique [0002] The production of alcohol with cassava as raw material has a relatively broad market in my country's Guangxi, Guangdong, Hubei, Jiangsu and other provinces. In the conventional production process, the wastewater discharged per 1 ton of cassava alcohol production is about 12-15 tons, and the temperature of cassava alcohol waste liquid is high, containing a large amount of organic compounds and suspended solids, with COD as high as 30-60g / L and suspended solids as high as 20- 30g / L, low pH, typical high-concentration organic wastewater, high concentration, high viscosity, direct solid-liquid separation treatment is more difficult. And the dregs after its separation are difficult to sell as feed due to low protein content. If the wastewater cannot be treated stably...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/44C02F103/32
Inventor 牛晓君
Owner SOUTH CHINA UNIV OF TECH
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