Bacterial oil treatment composition for handling a decommissioned oil cable
An improved bacterial oil treatment composition or pool for handling a decommissioned oil cable, which may be laid in particular as part of a power grid in the ground. The invention further relates to a bacteria growth culture medium containing the bacterial oil treatment composition for refurbishing an oil cable and a corresponding use.
1. A liquid for the biodegradation of dielectric oil in a decommissioned oil cable and/or for the production of bio-surfactants in a decommissioned oil cable, the liquid comprising:
bacterial community consisting of, with respect to percent (%) total bacteria in the bacterial community, 20% of Pseudomonas fluorescens, 40% of Bacillus subtilis, 30% of Bacillus licheniformis and 10% of Rhodococcus rhodochrous ; and
a bacterial growth culture medium comprising:
water;
standard salts selected from the group consisting of NH4Cl, NH4NO3, K2HPO4, KH2PO4, Na2HPO4, MgSO4*7H2O, FeSO4*7H2O and NaNO;
an organic started mix comprising yeast extract, malt extract, cane molasses and methyl-β-cyclodextrin;
a mix of branched-chain essential amino-acids and nitrogen fertilizers, wherein:
the branched-chain essential amino-acids comprise Na Leucine, Na Valine, Na Isoleucine and Na Glutamate at a ratio of 1:1:1:1, and
the nitrogen fertilizers comprise urea, uric acid and water soluble lecithin at a ratio of 2:1:1, wherein said liquid removes the dielectric contained in said decommissioned oil cable.
2. The liquid of claim 1 , further comprising a defoamer.
3. The liquid of claim 1 , further comprising a biocompatible antifoam mix comprising Na2EDTA, polydimethylsiloxane, simethicone and rapeseed oil.
4. The liquid of claim 1 , wherein the organic started mix comprises:
40 g/L of the yeast extract;
40 g/L of the malt extract;
100 g/L of the cane molasses; and
1 g/L of the methyl-β-cyclodextrin.
5. The liquid of claim 1 , wherein the mix of branched-chain essential amino-acids and nitrogen fertilizers comprises:
1-500 mg/L of the branched-chain essential amino-acids;
1-500 mg/L of the urea;
1-500 mg/L of the uric acid; and
1-500 mg/L of the water soluble lecithin.
6. The liquid of claim 3 , wherein the biocompatible antifoam mix comprises:
500 mg/L of the Na2EDTA;
200 g/L of the polydimethylsiloxane;
50 g/L of the simethicone; and
100 mL/L of the rapeseed oil.
7. The liquid of claim 3 , wherein bacterial growth culture medium comprises:
5-200 g/L of the organic started mix;
5-20 g/L of the mix of branched-chain essential amino-acids and nitrogen fertilizers; and
0.05-8 g/L of the bio-compatible antifoam mix.