FORMULATIONS, METHOD AND SYSTEM FOR REDUCING ENERGY AND WATER USAGE IN AN INSTITUTIONAL LAUNDRY
Formulations, methods using such a formulation, and systems encompassing such formulations and methods for reducing energy and/or water usage in an institutional laundry is provided. Such formulations, methods and systems allow for textiles and fabrics to be effectively washed even at temperatures as low as 20° C. A prewash formulation includes a surfactant enzyme booster with the surfactant enzyme booster having one but preferably more enzymes and one or more surfactants. The enzyme of the prewash formulation may include any one or more of a protease, a lipase, an amylase, a cellulase, a mannanase, a pectinase, a peroxidase, and a gluconase. A main wash formulation is used in a wash phase cycle of an institutional laundry where such a main wash formulation includes a bleach, bleach enhancer, a chelating agent, an anti-redeposition agent and/or a soil suspension agent, a surfactant, preferably a nonionic surfactant and an anionic surfactant, a solvent including an aqueous solvent and perhaps an organic solvent, and a builder. An institutional washing process using the formulations provided here are distinguished by the need to only include one rinse cycle—i.e., a rinse cycle between the prewash cycle and the main wash cycle is generally not needed or, at least, a full rinse cycle between the prewash cycle and the main wash cycle is not needed. The formulations, methods and systems provided reduce energy and water usage in an institutional laundry.
1 .- 60 . (canceled)
61 . A method of cleaning a fabric in an institutional laundry machine, the method comprising:
prewashing the fabric by including a surfactant enzyme booster formulation in a wash solution, wherein the surfactant enzyme booster formulation comprises surfactant and prewash enzyme;
washing the fabric by including a detergent formulation in the wash solution;
at least one of draining and extracting the wash solution to remove any remaining and spent surfactant enzyme booster formulation and detergent formulation from the fabric; and
rinsing the fabric using an aqueous solution.
62 . The method of claim 61 , wherein a pH of prewashing is about 7.
63 . The method of claim 61 , wherein the institutional laundry machine is not subjected to draining following the prewashing step and before the washing step.
64 . The method of claim 61 , wherein the prewash enzyme comprises a protease enzyme, a lipase enzyme, an amylase enzyme, a cellulase enzyme, a mannanase enzyme, a pectinase enzyme, or any combination thereof.
65 . The method of claim 61 , wherein the surfactant comprises a non-ionic surfactant, an anionic surfactant, or a mixture thereof.
66 . The method of claim 65 , wherein the non-ionic surfactant comprises an alcohol ethoxylate.
67 . The method of claim 66 , wherein the alcohol ethoxylate fulfills at least one of the following:
(a) the alcohol ethoxylate has an average of from about C10 to about C18 linear alcohol ethoxylate, and an average of from about 3 moles to about 7 moles of ethylene oxide;
(b) the alcohol ethoxylate comprises at least one of a linear alcohol ethoxylate and a branched alcohol ethoxylate;
(c) the alcohol ethoxylate has an average of from about C11 to about C14, and an average of about 8 moles of ethylene oxide.
68 . The method of claim 65 , wherein the anionic surfactant comprises an oleic acid or any salt thereof, an alkylbenzene sulfonic acid or any salt thereof, or any combination thereof.
69 . The method of claim 61 , wherein the surfactant enzyme booster formulation further comprises an organic solvent, a polyphosphate salt, or a mixture thereof.
70 . The method of claim 69 , wherein the organic solvent comprises a propylene glycol, a glycerol, or a mixture thereof.
71 . The method of claim 61 , wherein the surfactant enzyme booster formulation is substantially free of a phosphate.
72 . The method of claim 61 , wherein the detergent formulation comprises a bleach agent and a bleach enhancer.
73 . The method of claim 72 , wherein the bleach agent comprises hydrogen peroxide, peracetic acid, chlorine, a peroxy phthalimido alkanoic acid, or any combination thereof.
74 . The method of claim 72 , wherein the bleach enhancer comprises citric acid or salt thereof, potassium sodium persulfate, manganese gluconate, a laccase enzyme, or any combination thereof.
75 . The method of claim 72 , wherein the detergent formulation further comprises a chelate agent, an anti-redeposition agent, a builder, or any combination thereof.
76 . The method of claim 75 , wherein the method fulfills at least one of the following:
(a) the chelate agent comprises a methylglycinediacetic acid or any salt or derivative thereof;
(b) the anti-redeposition agent comprises carboxymethyl cellulose;
(c) the builder comprises an acrylic acid homopolymer, a double salt of potassium sulfate and aluminum sulfate, a mixture of an aromatic polyester and a zeolite, or any combination thereof;
77 . The method of claim 71 , wherein the detergent formulation further comprises a wash enzyme.
78 . The method of claim 77 , wherein the wash enzyme comprises a laccase enzyme.
79 . The method of claim 61 , wherein the washing the fabric comprises:
raising a pH of the wash solution to a range of from about 7 to about 9 using a portion of the detergent formulation, and
adding a remainder of the detergent formulation to the wash solution.
80 . The method of claim 79 , wherein the bleach agent substantially inactivates any active enzymes remaining in the wash solution.