Soap Recovery Systems

Developed for use in the kraft pulping process where immiscible liquids separate, A.H. Lundberg ’s advanced Soap Recovery System is an effective, low capital cost, and low maintenance process solution.
In kraft softwood mills, tall oil soap is a valuable byproduct as well as a toxin in the wastewater treatment system. AHL’s engineered recovery systems can help you properly manage foam and soap within the mill.

How the system works

Managing soap issues requires a number of steps, including the handling and deaeration of foam, separation of soap from liquor, and the separation of liquor from soap. Once the soap is separated from the system, it should be kept separate and not remixed with the liquor.

The A.H. Lundberg Soap Recovery System includes:

The benefits of our system include:

New technologies emerging from the by-product recovery of black liquor soap include conversion of the soap to biodiesel fuel (SDRF process) and the extraction of other valuable byproducts such as sterols.

Bluekey Energy – SDRF Biodiesel Process

An innovative biodiesel process tailored for the kraft pulp & paper industry.

Converting black liquor soap to biodiesel using Bluekey energy’s patented Soap Derived Refinery Feedstock (SDRF) process and A.H. Lundberg’s methanol purification technology adds new mill revenue to the already significant benefits of soap removal.

Soap removal provides the following benefits to the pulping process:

Now, the soap can be converted into high value biodiesel and biofuel providing significant new revenue streams for the mill.

The SDRF process is designed to be 100% compatible with existing kraft mill processes:

Environment impact is negligible. Chemical by-products from the SDRF process are compatible with black liquor and their return to the process decreases soda make-up requirements.

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