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
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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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