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Black liquor

In industrial chemistry, black liquor is the waste product from the kraft process when digesting pulpwood into paper pulp removing lignin, hemicelluloses and other extractives from the wood to free the cellulose fibers.The equivalent material in the sulfite process is usually called brown liquor, but the terms red liquor, thick liquor and sulfite liquor are also used.

Black liquor

  • Type: 
    Organisation
    Knowledge partner
    Country of registration:
    Canada
    Relation to CTCN:
    Network Member
    Knowledge Partner

    Viresco Solutions is a consulting firm based in Calgary, Alberta, Canada. Its core business is greenhouse gas offset policy development and implementation, greenhouse gas emissions quantification, sustainable supply chain development, environmental offset methodology development, and providing technical assistance to others undertaking carbon offset project development. Its clients include industry and non-governmental associations, large private sector companies, and local, provincial and federal governments.

  • Type: 
    Organisation
    Knowledge partner
    Country of registration:
    Ecuador
    Relation to CTCN:
    Network Member
    Knowledge Partner
    TA proponent

    IIGE is a research institute that promotes development, innovation and transmission of technology focused on energy efficiency and renewable energy. The institute aims to contribute to the sustainable development of the Ecuadorian society, through the implementation of energy efficient and energy renewable policies and projects.

  • Type: 
    Publication
    Publication date:
    Objective:

    This article explains the basics of black liquor gasification in the pulp and paper industry. Black liquor, which accounts for most of the fuel consumed in Kraft mills, is usually combusted in recovery boilers to recover chemicals and to produce process steam and on-site electricity (via a steam turbine). The efficiency of such boilers is, however, low (around 65%-70%). Black liquor gasification is a process in which a clean synthesis gas (syngas) is produced from black liquor by converting its biomass content into a gaseous energy carrier.

  • Type: 
    Publication
    Publication date:
    Objective:

    Black liquor (BL), a by-product of the papermaking process, is an important liquid fuel in the pulp and paper industry. It consists of the remaining substances after the digestive process where the cellulose fibres have been cooked out from the wood. This report is aimed to provide a comparison of the recovery boiler with a pressurised gasifier for black liquor. Fundamentals concerning the conversion of black liquor, some details about the two recovery technologies and differences between these two will be presented.

  • Type: 
    Product

    This invention is a process for manufacturing water-insoluble lignin-agglomerates in the form of granulates or briquettes from liquor left over as waste from processes of cellulose-extraction. The extract can be used energetically or materially. The extract is firstly granulated through spray-granulation or mix-agglomeration leaving lignin-agglomerates then is treated with acid lowering its pH-value and making it insoluble in water. This process can make not only lignin-granulates but also lignin-briquettes.

  • Type: 
    Product

    The main principle of this toilet is the separation of solid and liquid waste which is then later used for generation of biogas.

  • Type: 
    Product

    The device that is simple cheap and effective. The self contained chemical toilet automatically separates solid and liquid waste into different compartments. Instead of flushing the toilet a chemical process is starting which converts the solid waste including toilet paper into sterile ash in less than a minute. The liquids are being sterilized and recycled.

  • Type: 
    Product

    Lesico CleanTech is a pioneer in delivering sustainable technologies which recycle or minimize the volume of liquid waste primarily desalination rejected brine. The solutions not only help users comply with stringent regulation but result in substantial savings in real estate installation and operational costs.