Water treatment compositions and methods of use
Methods for clarifying water, reducing turbidity of water, and removing phosphate from water include adding a water treatment composition having an aluminum-containing coagulant, and a natural non-charged polysaccharide, such as guar. The aluminum-containing compound can include polyaluminum chloride, aluminum chlorohydrate, polyaluminum chlorohydrate, aluminum sulfate, sodium aluminate, polyaluminum sulfate, polyaluminum silicate chloride, polyaluminum silicate sulfate, or a combination thereof.
1. A composition consisting of the following components:
polyaluminum chloride having a basicity greater than 65% and less than 70%;
uncharged guar; and
water,
wherein a weight ratio of the polyaluminum chloride to the uncharged guar in the composition is between 10:1 and 100:1;
said composition being capable of clarifying or reducing a turbidity of a turbid water when an effective amount of said composition is mixed therewith.
2. The composition of claim 1 , wherein the weight ratio of the uncharged guar to the polyaluminum chloride is about 1:34.
3. The composition of claim 1 , wherein the composition is made by a process comprising mixing the uncharged guar in a solid guar form and the polyaluminum chloride in a solid polyaluminum chloride form, and adding the water to the solid guar form and the solid polyaluminum chloride form.
4. A method for clarifying or reducing a turbidity of drill water, the method comprising:
mixing a composition consisting of the following components:
polyaluminum chloride having a basicity greater than 65% and less than 70%; and
uncharged guar, wherein a weight ratio of the polyaluminum chloride to the uncharged guar in the composition is between 10:1 and 100:1;
with the drill water;
forming agglomerations in the drill water containing the composition that is mixed; and
removing the agglomerations from the drill water,
thereby clarifying or reducing the turbidity of the drill water.
5. The method of claim 4 , comprising:
mixing the uncharged guar in solid form and the polyaluminum chloride in solid form to form a solid mixture and adding water to said solid mixture.
6. A method for clarifying or reducing a turbidity of a process water comprising suspended materials from oil or gas drilling, hydraulic fracturing, or oil refinery operations, the method comprising:
the step of forming a mixture comprising mixing a composition consisting of the following components:
polyaluminum chloride having a basicity greater than 65% and less than 70%; and
uncharged guar; and
water,
wherein a weight ratio of the polyaluminum chloride to the uncharged guar in the composition is between 10:1 and 100:1;
with the process water from oil refinery operations containing suspended materials to form a mixed liquid;
forming agglomerations in the mixed liquid;
removing the agglomerations from the mixed liquid, thereby clarifying or reducing the turbidity of the process water.