To treat organic sludge while keeping facility costs, cement production efficiency, and a reduction in clinker production amount to a minimum. An organic sludge treatment device includes: a fractionation device 7 that fractionates a preheated raw material R2 from a preheater cyclone 4C excluding a bottommost cyclone of a cement burning device 1; a mixing device 8 that mixes an organic sludge S with the fractionated preheated raw material, and that dries the organic sludge using sensible heat of the preheated raw material; and a supply device (mixture chute 12, double-flap damper 13, shut damper 14) that supplies a mixture M from the mixing device to a calciner furnace 5 of the cement burning device or to a duct disposed between a kiln inlet portion of a cement kiln 2 and the calciner furnace. The treatment device may be provided with an introduction device for introducing an exhaust gas G2 including dust, odor and water vapor from the mixing device to a gas outlet of a bottommost cyclone 4A of the cement burning device.

A method of treatment of aqueous liquid contaminated by pollutants, includes (i) mixing the contaminated aqueous liquid with a mineral binder in order to produce an homogeneous slurry, (ii) depositing the slurry, (iii) letting the slurry set and harden, wherein the mineral binder includes Portland cement, and wherein the contaminated aqueous liquid includes organic pollutants.

The present invention discloses a highly effective in situ treatment method for endogenous pollution in sludge, belonging to the field of environmental engineering water treatment. In view of the problem that it is difficult to effectively treat the endogenous pollution of river sludge, the present invention provides the highly effective in situ treatment method for endogenous pollution in sludge, which specifically adopts a combination of phoslock, calcium peroxide and aluminum modified zeolite to perform in-situ remediation of sludge, effectively inhibit the release of endogenous pollution of sludge, facilitate the ecological treatment of polluted water subsequently, and finally realize the long-term water improvement against pollution.

The present invention discloses a highly effective in situ treatment method for endogenous pollution in sludge, belonging to the field of environmental engineering water treatment. In view of the problem that it is difficult to effectively treat the endogenous pollution of river sludge, the present invention provides the highly effective in situ treatment method for endogenous pollution in sludge, which specifically adopts a combination of phoslock, calcium peroxide and aluminum modified zeolite to perform in-situ remediation of sludge, effectively inhibit the release of endogenous pollution of sludge, facilitate the ecological treatment of polluted water subsequently, and finally realize the long-term water improvement against pollution.

A cavitation apparatus capable of performing multiple, different-type cavitation processes taking place simultaneously in the same geometric space, thereby obtaining an effective cavitation process that is significantly faster than those provided by conventional cavitation apparatus. The cavitation apparatus can include consecutive and/or simultaneous cavitation units which are configured to carry out consecutive and/or simultaneous cavitation processes on a material flowing through the apparatus, such that effects of one or more prior cavitation processes are present in the material while the material is subjected to one or more further cavitation processes within the apparatus, enhancing the cavitation effects in a reduced amount of time and increasing productivity of the apparatus. In some embodiments, the apparatus can perform seven cavitation processes, of four different types.

A cavitation apparatus capable of performing multiple, different-type cavitation processes taking place simultaneously in the same geometric space, thereby obtaining an effective cavitation process that is significantly faster than those provided by conventional cavitation apparatus. The cavitation apparatus can include consecutive and/or simultaneous cavitation units which are configured to carry out consecutive and/or simultaneous cavitation processes on a material flowing through the apparatus, such that effects of one or more prior cavitation processes are present in the material while the material is subjected to one or more further cavitation processes within the apparatus, enhancing the cavitation effects in a reduced amount of time and increasing productivity of the apparatus. In some embodiments, the apparatus can perform seven cavitation processes, of four different types.

A settling basin of a wastewater treatment system includes a collector chain including chain links having a plurality of side bars, stepped connecting pins configured to join the plurality of side bars and including a first end including a head portion having a cross-sectional area larger than portions of the plurality of side bars through which the stepped connecting pin extends, end caps configured to receive second ends of the stepped connecting pins, and apertures defined in the end caps and second ends of the stepped connecting pins configured to receive a retaining element that holds the end caps in position on the second ends of the stepped connecting pins.

The invention concerns a method for extracting valuable materials from organic compounds contained in waste or chemical elements contained therein.

The method comprises the following steps carried out in succession: a) mixing the waste (1) with a base so that a liquid medium is formed, b) heating the medium in a reactor (3) to a temperature of 100 C. to 140 C. in order to hydrolyse the organic compounds contained in the medium, and withdrawing (c) the vapour which is formed, b1) transferring (c) the vapour from the reactor (3) to a washing tower (4), b2) adding sulphuric acid or phosphoric acid (c) to the vapour in order to form ammonium sulphate(s) or ammonium phosphate(s), wherein a solution is obtained in the bottom of the washing tower (4) and the vapour is withdrawn from the head of the washing tower (4), b3) transferring (e) the solution obtained in step b2) to an electrochemical cell (6) with a cathode chamber and an anode chamber and electrolysing the solution, whereupon in the anode chamber, sulphuric acid or phosphoric acid is obtained for step b2), b4) recycling (c) the sulphuric acid or phosphoric acid obtained from the anode chamber to the washing tower and withdrawing (f) valuable materials formed in the cathode chamber, in particular an ammoniacal solution, c) transferring (d) the liquid medium remaining in the reactor (3) in step b) to a separating device (5) in order to separate any solid inorganic phase which is contained in the liquid medium.

A cement solidification device for waste includes a slurrying vessel 14 that dissolves and slurries waste 11 containing harmful substances and deliquescent compounds in solvent water 12 to obtain slurried material 13; an iron-based additive supply unit 16 that adds an iron-based additive 15 to the slurrying vessel 14; a cement kneading vessel 20 that adds a cement solidifying agent 17 from a cement-solidifying agent supply unit 18 to the slurried material 13 in which the iron-based additive 15 is mixed to obtain a cement kneaded product 19; and a cement solidification unit 22 that cures the cement kneaded product 19 to form a cement solidified product 21.

A cement solidification device for waste includes a slurrying vessel 14 that dissolves and slurries waste 11 containing harmful substances and deliquescent compounds in solvent water 12 to obtain slurried material 13; an iron-based additive supply unit 16 that adds an iron-based additive 15 to the slurrying vessel 14; a cement kneading vessel 20 that adds a cement solidifying agent 17 from a cement-solidifying agent supply unit 18 to the slurried material 13 in which the iron-based additive 15 is mixed to obtain a cement kneaded product 19; and a cement solidification unit 22 that cures the cement kneaded product 19 to form a cement solidified product 21.