Micro-encapsulating flocculating dispersion water treatment system

A method for treating water comprising residual oil and/or solids, comprising:

• providing a flow of untreated water, the untreated water comprising residual oil and/or solids, into piping with a series of inline mixers located on the piping;
• adding, if necessary, a pH adjustment fluid to the flow of untreated water in a first inline mixer;
• adding a micro-encapsulating flocculating dispersion flocculant to the flow of water in a second inline mixer to form a pin flocculant in the flow of water;
• adding, if necessary, an activator to the flow of water in a third inline mixer;
• adding a conditioner to the flow of water in a fourth inline mixer to form a bulk flocculant in the flow of water;
• providing the flow of water to a settling tank;
• and
• allowing the bulk flocculant and/or the pin flocculant to settle from the water in the settling tank.

A method for treating water produced as a by-product of an oil or gas production process, comprising:

• providing a flow of untreated water, the untreated water comprising residual oil, into piping with a series of inline mixers located on the piping;
• adding, if a pH of the untreated water needs adjustment, a pH adjustment fluid to the flow of untreated water in a first inline mixer;
• adding a micro-encapsulating flocculating dispersion flocculant to the flow of water in a second inline mixer to form a pin flocculant in the flow of water;
• adding, if necessary, an activator to the flow of water in a third inline mixer;
• adding a conditioner to the flow of water in a fourth inline mixer to form a bulk flocculant in the flow of water;
• providing the flow of water to a settling tank, wherein the flow of water comprises at least some residual oil;
• allowing the bulk flocculant and/or the pin flocculant to settle from the water in the settling tank, wherein at least some of the bulk flocculant and/or the pin flocculant forms a layer separating at least some of the residual oil from the water;
• and
• removing the oil from the settling tank.