# US 12,178,208 B2 · Nutrient solution formula for inhibiting green algae

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- Number: US 12,178,208 B2
- Document ID: US12178208B2
- Status: Granted
- Kind: B2
- Application number: 17/606,443
- Filed: 2019-08-08
- Published: 2022-06-23
- Granted: 2024-12-31
- Earliest claimed: 2019-04-23
- Applicants: Nanjing Zhengbang Horticulture Technology Co., Ltd.
- Inventors: Hongwu Bai
- Web page: https://patentgrep.com/patent/US12178208B2

## CPC

- A01N 33/12: Quaternary ammonium compounds
- A01P 13/00: Herbicides; Algicides
- C05C 5/02: containing sodium or potassium nitrate
- C05C 5/04: containing calcium nitrate
- C05G 3/00: Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01P: BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- C05C: NITROGENOUS FERTILISERS
- C05G: MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS (organic fertilisers containing added bacterial cultures, mycelia, or the like C05F11/08; organic fertilisers containing plant vitamins or hormones C05F11/10); FERTILISERS CHARACTERISED BY THEIR FORM

## Abstract

The invention discloses a nutrient solution formula for inhibiting green algae, comprising a basic nutrient solution and an algae inhibitory substance, wherein the basic nutrient solution comprises major elements, minor elements and trace elements. The specific ratio is: 1000 mg/L of calcium nitrate, 1000 mg/L of potassium nitrate, 200 mg/L of EDTA-FeNa, 200 mg/L of potassium dihydrogen phosphate, 150 mg/L of ammonium dihydrogen phosphate, 700 mg/L of magnesium sulfate, 7 mg/L of boric acid, 5 mg/L of manganese sulfate, 15 mg/L of ferrous sulfate, 0.25 mg/L of copper sulfate, 0.22 mg/L of zinc sulfate, 0.02 mg/L of ammonium molybdate, and 0.01 mg/L of benzalkonium chloride. The benzalkonium chloride can provide Cl ions, and it has a good bactericidal and algae-killing ability in different pH value ranges; the optimal dosage is 0.01 mg/L.

## Claims

### Claim 1

A nutrient solution formula for inhibiting green algae, comprising a basic nutrient solution and an algae inhibitory substance, wherein the basic nutrient solution comprises major elements, minor elements and trace elements, the basic nutrient solution is: 1000 mg/L of calcium nitrate, 1000 mg/L of potassium nitrate, 200 mg/L of EDTA-FeNa, 200 mg/L of potassium dihydrogen phosphate, 150 mg/L of ammonium dihydrogen phosphate, 700 mg/L of magnesium sulfate, 7 mg/L of boric acid, 5 mg/L of manganese sulfate, 15 mg/L of ferrous sulfate, 0.25 mg/L of copper sulfate, 0.22 mg/L of zinc sulfate, 0.02 mg/L of ammonium molybdate, and 0.01 mg/L of benzalkonium chloride.

### Claim 2 (depends on 1)

The nutrient solution formula according to claim 1, wherein the benzalkonium chloride can provide Cl ions, and it has a bactericidal and algae-killing ability in different pH value ranges; the dosage is 0.01 mg/L; it can effectively penetrate the green algae cell wall and decompose the DNA of the green algae cells, thereby killing and inhibiting the algae reproduction.