Method for preparing biological flocculant using glutamic acid fermentation waste water

A biological flocculant and fermentation wastewater technology, applied in chemical instruments and methods, biological water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as environmental pollution, waste of valuable resources, etc. Realize the effect of fermentation cost and sulfate concentration reduction

Inactive Publication Date: 2007-02-14
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wastewater contains glutamic acid, reducing sugar, SS and ammonia nitrogen, and its arbitrary discharge not only wastes precious resources, but also causes serious environmental pollution

Method used

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  • Method for preparing biological flocculant using glutamic acid fermentation waste water

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specific Embodiment approach 1

[0012] Specific Embodiment 1: In this embodiment, biological flocculants are produced by using glutamic acid fermentation wastewater according to the following method: a. Using straw cellulose biomass materials as raw materials, using a physical-chemical combination method for pretreatment to Improve the degradation rate of cellulose in the subsequent fermentation stage, that is: ① firstly crush the raw materials mechanically, ② treat with chemical reagents for delignification, and ③ steam and explode after treatment to further break the crystal structure and protective layer of cellulose molecules, so that The material becomes fluffy; b. Add glutamic acid fermentation waste water, prepare the culture medium, make the pH value to 7.0~7.5, add inorganic salt: 0.5~5g / L KH 2 PO 4 , 0.1~1g / L MgSO 4 ·7H 2 O, 0.1g / L NaCl, 0.01~0.05g / L FeCl 3 , 1.0~5g / L NaNO 3 to meet the nutritional requirements of microbial fermentation, wherein the raw materials account for 1 to 5% of the mass...

specific Embodiment approach 2

[0014] Specific implementation mode 2: This implementation mode takes glutamic acid fermentation waste water of a monosodium glutamate factory as an example, wherein the water quality of process drainage COD Cr =2500mg / L, BOD 5 =1200mg / L, SS≤300mg / L, TN≤200mg / L, pH=5.0~6.0; condensed water quality COD Cr =8000mg / L, BOD 5 =400mg / L, SS≤2000mg / L, TN≤300mg / L, pH=3.0~5.0, the water volume of both is the same. After the process drainage and condensed water are mixed and settled for 4 hours, straw treatment materials and inorganic salts are added according to a certain mass-volume ratio to make the pH = 7.0-7.5. The specific process is as follows figure 1 As shown, the processing effect is as follows:

[0015] (1) The pH of the straw treatment product obtained through pretreatment is 8.0-10.0, while the pH of the glutamic acid fermentation wastewater is 3.0-6.0. The two are mixed as the main component of the fermentation substrate, and the pH value is not adjusted using acid and a...

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Abstract

The present invention is fermentation process of preparing bioflocculant with waste water from glutamic acid production, and aims at producing bioflocculant for replacing high molecular flocculant prepared with petroleum as material used in eliminating water pollutant. The present invention prepares bioflocculant through one two-stage fermentation process and features the addition of waste water from glutamic acid production to reach the pH of 7.0-7.5. The present invention has waste water used for treating pollutant and can reach agricultural and industrial beneficial cycle.

Description

technical field [0001] The invention relates to a fermentation process of a flocculant. Background technique [0002] Bioflocculant (Bioflocculant, referred to as BF) is a kind of biologically produced, mainly obtained by microbial fermentation, which can make solid suspended particles, bacterial cells and colloidal particles that are not easy to degrade in the liquid coagulate and precipitate with special high Molecular substances, new flocculants obtained through separation and extraction using biotechnology, are biodegradable and safe. It is a new type, high efficiency, non-toxic, and non-secondary pollution water treatment agent, which is of great practical significance to human health and environmental protection. Bioflocculant is a typical green water treatment agent, which meets the requirements of contemporary sustainable development and represents one of the important directions of flocculant research and development. [0003] Compound bioflocculant (Compound biof...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F3/00
Inventor 马放朱艳彬任南琪李大鹏
Owner HARBIN INST OF TECH
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