Production method for liquid organic fertilizer by using starch wastewater

A technology for organic fertilizer and starch wastewater, applied in organic fertilizer, sewage/sludge fertilizer, biological organic part treatment, etc., can solve the problems of complex process, ineffective utilization and treatment of biogas slurry, and high product cost, and achieve simple process. , to achieve the effect of waste utilization and low production cost

Inactive Publication Date: 2014-02-05
眉县果业技术推广服务中心
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Problems solved by technology

There are many studies on resource utilization of starch wastewater, such as the use of starch wastewater to produce biogas. Since the biogas slurry cannot be effectively used and treated, this mature treatment method has gradually been a

Method used

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Examples

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Example Embodiment

[0014] Step 1: The waste water discharged from the production of corn starch or wheat starch is added to a closed container after filtering impurities with a stainless steel screen with a mesh of 2-3 mm;

[0015] Step 2: Perform anaerobic fermentation by inoculating a starter at 8% of the weight of the waste water. The starter is prepared by a 1:1 weight ratio of Lactobacillus acidophilus and Saccharomyces cerevisiae. The fermentation temperature is 30-35°C. When the pH of the liquid drops below 3.5, the fermentation process is completed;

[0016] Step 3: Add ferrous sulfate to the above fermentation broth at a weight ratio of 4%.

[0017] The waste water discharge time used in the step 1 does not exceed 2 hours. Because starch wastewater over 2 hours breeds too many bacteria, it cannot be used as fermentation raw material.

[0018] The organic fertilizer produced by the above process has the following functions and characteristics:

[0019] 1. Physical and chemical properties: light ...

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Abstract

The invention provides a production method for a liquid organic fertilizer by using starch wastewater. The method comprises the following steps: step 1, filtering wastewater discharged during production of corn starch or wheat starch to remove foreign materials and adding the wastewater having undergone filtration into an enclosed container; step 2, inoculating a starter accounting for 5 to 10% of the weight of the wastewater for anaerobic fermentation, wherein the starter is prepared from lactobacillus acidophilus and saccharomyces cerevisiae in a weight ratio of 1: 1, fermentation temperature is 30 to 35 DEG C, and fermentation is completed when the pH value of fermentation broth decreases to less than 3.5 according to detection results; and step 3, adding 3 to 5 wt% of ferrous sulphate into the fermentation broth. The method provided by the invention can both effectively mitigate pollution of the wastewater to the environment and realize utilization of the waste, and the prepared liquid organic fertilizer has the advantages of small investment, simple process, substantial fertilizer efficiency, low production cost, remarkable competitive advantages and great market potential.

Description

technical field [0001] The invention relates to a production method of agricultural fertilizer, in particular to a method for producing liquid organic fertilizer by utilizing starch wastewater. Background technique [0002] Wheat starch and corn starch are widely used in industrial production and daily life, but a large amount of wastewater will be generated in the production process. The wastewater contains a certain amount of organic components such as starch, pentosan, and protein. Direct discharge will cause serious environmental pollution. At present, the treatment methods of starch wastewater all adopt the treatment method of domestic sewage, that is, the activated sludge method, and the COD can be discharged after reaching the standard. There are many researches on the resource utilization of starch wastewater, such as using starch wastewater to produce biogas. Since the biogas slurry cannot be effectively used and treated, this mature treatment method has gradually ...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05F7/00
CPCY02A40/20Y02W30/40
Inventor 屈学农杨应祥赵英杰
Owner 眉县果业技术推广服务中心
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