TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The microbial preparation comprises either (in wt. %) Lactobacillus acidophilus (15-35), Candida utilis (15-35), Bacillus licheniformis (5-25), Streptomyces albus (10-25), and Rhodopseudomonas palustris (15-30), or Lactobacillus acidophilus (20-30), Candida utilis (20-30), Bacillus licheniformis (10-20), Streptomyces albus (10-20), and Rhodopseudomonas palustris (20-25), or Lactobacillus acidophilus (30), Candida utilis (15), Bacillus licheniformis (15), Streptomyces albus (20), and Rhodopseudomonas palustris (20), or Lactobacillus acidophilus (30), Candida utilis (20), Bacillus licheniformis (15), Streptomyces albus (15), and Rhodopseudomonas palustris (20), or Lactobacillus acidophilus (20), Candida utilis (20), Bacillus licheniformis (20), Streptomyces albus (20), and Rhodopseudomonas palustris (20), and the total bacterial number of the microbe preparation is not smaller than 2x 108 ml, and pH is 3.5-4.0.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: In step (i), the culture medium for preparing the single strain of Lactobacillus acidophilus comprises (in g) casein peptone (10), yeast extract (5), glucose (5), lactose (5), sodium acetate (5), bi-ammonium citrate (2), TWEEN 80 (RTM: Polyethylene glycol sorbitan monooleate) (1), potassium hydrogen phosphate trihydrate (2), manganese sulfate (0.0.5), magnesium sulfate heptahydrate (0.2), calcium carbonate heptahydrate (20), agarophyte (15), and distilled water (1000 ml), where the pH is 6.8. The culture medium for preparing the single strain of Candida utilis comprises (in g) sodium nitrate (3), potassium hydrogen phosphate trihydrate (1), magnesium sulfate heptahydrate (0.5), potassium chloride (0.5), ferrous sulfate heptahydrate (0.01), sucrose (30), agarophyte (15), and distilled water (1000 ml), where the pH is neutral. The culture medium for preparing the single strain of Bacillus licheniformis comprises (in g) beef extract (10), peptone (10), sodium chloride (15), agarophyte (15), and water (1000 ml), where the pH is 7.2-7.4. The culture medium for preparing the single strain of Streptomyces albus comprises (in g) sodium chloride (0.5), potassium nitrate (1), potassium hydrogen phosphate trihydrate (0.5), magnesium sulfate heptahydrate (0.5), ferrous sulfate heptahydrate (10 mg), soluble starch (20), agarophyte (20) and water (1000 ml), where the pH is 7.2-7.4. The culture medium for preparing the single strain of Rhodopseudomonas palustris comprises (in g) peptone (3), yeast extract (3), magnesium sulfate heptahydrate (0.5), calcium chloride (0.3), agarophyte (0.5), and distilled water (1000 ml), where the pH is 6.8. In step (ii), the culture medium for preparing the single strain of Lactobacillus acidophilus comprises (in g) peptone (10), beef extract (10), yeast extract (5), glucose (5), lactose (5), sodium acetate (5), bi-ammonium citrate (2), TWEEN 80 (RTM: Polyethylene glycol sorbitan monooleate) (1), potassium hydrogen phosphate trihydrate (2), manganese sulfate monohydrate (0.0.5), magnesium sulfate heptahydrate (0.2), calcium carbonate heptahydrate (20), and distilled water (1000 ml), where the molasses is added to the culture medium to adjust the pH to be 6.8. The culture medium for preparing the single strain of Candida utilis comprises (in g) sodium nitrate (3), potassium hydrogen phosphate trihydrate (1), magnesium sulfate heptahydrate (0.5), potassium chloride (0.5), ferrous sulfate heptahydrate (0.01), sucrose (30), and distilled water (1000 ml), where the molasses is added to the culture medium and pH value is neutral. The culture medium for preparing the single strain of Bacillus licheniformis comprises (in g) beef extract (10), peptone (10), sodium chloride (5), and water (1000 ml), where the molasses is added to the culture medium to adjust the pH to be 7.2. The culture medium for preparing the single strain of Streptomyces albus comprises (in g) sodium chloride (0.5), potassium nitrate (1), potassium hydrogen phosphate trihydrate (0.5), magnesium sulfate heptahydrate (0.5), ferrous sulfate heptahydrate (10 mg), soluble starch (20), and water (1000 ml), where the molasses is added to the culture medium to adjust the pH to be 6.8. The culture medium for preparing the single strain of Rhodopseudomonas palustris comprises (in g) peptone (3), yeast extract (3), magnesium sulfate heptahydrate (0.5), calcium chloride (0.3), and distilled water (1000 ml), where the molasses is added to the culture medium to adjust the pH to be 6.7, and then adding Candida utilis into the seed tank for complex acclimatization culture. Preferred method: In the complex culturing of step (iii), the ingredients of the culturing medium is pre-processed molasses and peptone, where the weight proportion of molasses to peptone is 20:1, adjusting pH to 6.8, sterilizing for 2 hours at 100 degrees C after quickly cooling to 40 degrees C, taking the acclimatized liquid seed mixture to inoculate, where the proportion of the acclimatized liquid seed to the molasses is 1:1, and the weight proportions of each bacterial ingredient in the acclimatized liquid seed are Lactobacillus acidophilus (15-35), Candida utilis (15-35), Bacillus licheniformis (5-25), Streptomyces albus (10-25), and Rhodopseudomonas palustris (15-30), fermenting for 72-120 hours and preparing the finished product after the pH value falls to 3.5-4.