Middling starch slurry and cassava fermentation alcohol wastewater treatment and thermoelectric fertilizer co-generation method

A technology for fermented alcohol and wastewater treatment, applied in flocculation/sedimentation water/sewage treatment, precipitation treatment, multi-stage water treatment, etc. To achieve the effect of comprehensive utilization of recycled resources

Inactive Publication Date: 2017-06-13
SUZHOU WANSHEN FLOUR PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using traditional sewage treatment methods to treat such wastewater, such as "anaerobic + aerobic" method, the treatment effect is not obvious and the efficiency is low, and it is difficult to realize resource reuse of wastewater; therefore, there is an urgent need to develop new technologies and processes, Realize comprehensive utilization while treating waste water up to standard discharge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Waste water treatment and thermoelectric fertilizer co-production method of sub-starch slurry and cassava fermented alcohol

[0021] The average wastewater output of a starch slurry and cassava fermentation alcohol production line is 5000 tons / day, the main water quality indicators are COD value 62000±1000mg / L, SS value 33000±750mg / L, temperature 90±5℃, the wastewater treatment and The cogeneration method of thermoelectric fertilizer is as follows.

[0022] (1) Pretreatment.

[0023] Filter the wastewater through a 10-mesh sieve, complete the homogenization and equalization in the blending tank, cool down to 60~62°C, adjust the pH to 7.0±0.5, and set aside.

[0024] (2) Anaerobic treatment produces biogas.

[0025] Pump the wastewater pretreated in step (1) into the first-level IC reactor (internal circulation anaerobic reactor) for high-temperature anaerobic fermentation at 55±3°C, the inoculum amount of biogas fermentation strains is 5%, and the treatm...

Embodiment 2

[0034] Embodiment 2: Secondary starch slurry and cassava fermented alcohol waste water treatment and thermoelectric fertilizer co-production method

[0035] Include the following steps:

[0036] Step 1: Pretreatment of secondary starch slurry and cassava fermentation alcohol wastewater

[0037] The secondary starch slurry and cassava fermentation alcohol wastewater are filtered through a 10-mesh screen to obtain a filtrate, and then the temperature of the filtrate is adjusted to 58-62°C and the pH value is 6.5-7.5; the secondary starch slurry is fermented with cassava The chemical oxygen demand of alcohol wastewater is 60000-65000mg / L, the suspended solid content is 30000-35000mg / L, and the temperature is 80-100℃;

[0038] Step 2: Anaerobic treatment to generate biogas

[0039] Pump the filtrate obtained in the first step into the first IC reactor, inoculate biogas fermentation strains, and carry out anaerobic fermentation at 45-60°C for 5-10 days; then pump it into the firs...

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PUM

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Abstract

The invention relates to the technical field of alcohol wastewater treatment, and provides a middling starch slurry and cassava fermentation alcohol wastewater treatment and thermoelectric fertilizer co-generation method. The method comprises the steps of 1 pretreatment of middling starch slurry and cassava fermentation alcohol wastewater, 2 anaerobic treatment for methane production, 3 methane conveying and thermoelectric co-generation, 4 wastewater up-to-standard discharge, 5 organic fertilizer processing. The method achieves the purposes that cassava and waste slurry generated when vital gluten and starch are generated by means of wheat flour are cooperatively adopted as raw materials, saccharomycetes is adopted for fermenting alcohol, and up-to-standard discharge of the generated wastewater is achieved; meanwhile, the thermoelectric fertilizer co-generation technology is developed, and recycling comprehensive utilization is achieved.

Description

technical field [0001] The invention belongs to the field of waste water treatment and comprehensive utilization, and in particular relates to a method for waste water treatment and thermoelectric fertilizer co-production of secondary starch slurry and cassava fermented alcohol. Background technique [0002] Alcohol is an important basic raw material of the national economy and is widely used in chemical industry, food industry, medicine and health and other fields. The alcohol products produced by fermentation method (also called brewing method) are of high quality, the ethanol content is greater than or equal to 95%, and the methanol content is less than 0.01%, which has gradually become the main method of alcohol production at home and abroad. In the process of alcohol production by fermentation, the distiller's grains discharged from the mature mash, the cooling water of cooking, saccharification, fermentation and distillation processes, the washing water and flushing wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C05F7/00C12P5/02C02F103/36
CPCC02F1/001C02F1/52C02F3/02C02F3/28C02F7/00C02F9/00C02F2001/007C02F2103/36C02F2301/08C05F7/005C12P5/023Y02A40/20Y02E50/30Y02W30/40
Inventor 吕西军马鹏举廖建昌党钰纵鑫陈伟李兴江邓永东
Owner SUZHOU WANSHEN FLOUR PROD
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