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    PROCESS FOR PRODUCING POLYHYDROXYALKANOATE
    21.
    发明申请
    PROCESS FOR PRODUCING POLYHYDROXYALKANOATE 审中-公开

    公开(公告)号：US20180363013A1

    公开(公告)日：2018-12-20

    申请号：US15780407

    申请日：2016-12-02

    Applicant: Paques I.P. B.V.

    Inventor： Hendrik DIJKMAN

    IPC: C12P7/62 ,  C02F3/34 ,  C02F3/12 ,  C02F3/00 ,  C02F3/30

    Abstract: High levels of polyhydroxyalkanoates (PHA) can be produced from wastewater comprising Readily Biodegradable COD (RBCOD) using activated sludge comprising microorganisms capable of accumulating PHA by contacting the wastewater with the activated sludge in the presence of dissolved oxygen during a first period of time, to obtain PHA-loaded activated sludge, and then supplying elements essential for growth such as nitrogen and phosphorus and allowing up-take of these elements and limited growth during a second period of time, the supplied amount of at least of one of said essential elements compared to the amount of RBCOD supplied in step a) limiting the growth to an extent that not all PHA is used for growth, to obtain grown activated sludge; and removing or harvesting part of the PHA-loaded activated sludge and/or part of the grown activated sludge, so that the total average retention time of the sludge is less than 72 h.

    PROCESS FOR CONTROLLING THE SODIUM AND SULFUR BALANCE IN A PULP MILL
    22.
    发明申请
    PROCESS FOR CONTROLLING THE SODIUM AND SULFUR BALANCE IN A PULP MILL 有权

    公开(公告)号：US20210130208A1

    公开(公告)日：2021-05-06

    申请号：US17148426

    申请日：2021-01-13

    Applicant: Stora Enso OYJ ,  Paques I.P. B.V.

    Inventor： Erik VAN ZESSEN ,  Michel Paulus Maria NOORDINK ,  Rickard WADSBORN ,  Olli TIMONEN ,  Maria BJÖRK ,  Ari KOTILAINEN

    IPC: C02F3/34

    Abstract: The present invention relates to a process for the controlling the sodium and sulfur levels in a pulp mill, comprising the steps of: a) providing a pulp mill stream comprising sulfide and having a total alkali concentration of at least 2 Molar; b) supplying a portion of the pulp mill stream to a reactor comprising sulfide oxidizing bacteria and removing sulfide from the pulp mill stream by subjecting said stream to sulfide oxidizing bacteria in the presence of oxygen, and at a pH in the range 8 to 11, to oxidize the sulfide to elemental sulfur, c) withdrawing from the reactor a treated pulp mill stream comprising sulfur, wherein the portion of the pulp mill stream is mixed with a portion of the sulfide oxidizing bacteria present in the reactor prior to supplying the pulp mill stream to the reactor in step b).

    Apparatus and method for purification of a fluid by means of a filter bed
    23.
    发明授权
    Apparatus and method for purification of a fluid by means of a filter bed 有权

    公开(公告)号：US10765972B2

    公开(公告)日：2020-09-08

    申请号：US15738135

    申请日：2016-07-01

    Applicant: Paques I.P. B.V.

    Inventor： Jelle Faber ,  Pieter van der Heiden ,  René Alexander Rozendal

    IPC: B01D24/30 ,  B01D24/46 ,  B01D24/26

    Abstract: The invention provides an apparatus and method for purification of a fluid, the apparatus comprising: a vessel (1) for receiving, in operation, a filter bed (2) with granular filter material; a transport system (8) configured to, during operation, transport filter material from a cavity (5) underneath the filter bed (2) to a location (17) above the filter bed; a fluid inlet (14) for introducing fluid to be purified into the apparatus; a mixing section (3) adapted to, in operation, provide a mixture of fluid from the fluid inlet and granular filter material from the filter bed in a part of the vessel beneath the mixing section; and a plurality of gas lift injectors (4), wherein each gas lift injector (4) is configured to, in operation, transport the mixture of fluid from the fluid inlet (14) and granular filter material from the filter bed (2) to the cavity (5).

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