Hearings of the International Joint Commission in re remedies for the pollution of boundary waters between the United States and Canada

by International Joint Commission

Mr. Tawney. The installation?

Mr. Hatton. About the same as the Imhoff tank. I say that because we worked out the Imhoff tank layout, and also our activated sludge layout, upon the same ground, and it broke even as to cost.

Mr. Mignault. When you say you make a profit on the sludge, in the disposal of it, what cost do you consider?

Mr. Hatton. I did not catch that.

Mr. Mignault. When you say you make a profit out of the disposal of the sludge, what cost do you consider? The cost of the drying——

Mr. Hatton. The cost of the drying, the cost of the dewatering, the cost of the freight and the overhead charges of the machinery necessary to dewater and to dry, and the attendance cost—all those have to be taken into consideration.

Mr. Powell. You take the raw sewage that comes from the tank?

Mr. Hatton. We take the raw sewage as it comes from the sedimentation tank containing 97 per cent of water and deal with that.

Mr. Powell. That all enters into cost?

Mr. Hatton. Yes.