The present disclosure discloses a sludge composite conditioner based on iron-containing sludge pyrolysis residue as well as a preparation method and use thereof. The sludge composite conditioner comprises iron-containing sludge pyrolysis residue and an oxidant used in combination with the iron-containing sludge pyrolysis residue, in which the iron-containing sludge pyrolysis residue is pyrolysis residue obtained by dewatering iron-containing sludge to obtain an iron-containing sludge cake and then pyrolyzing the iron-containing sludge cake, the iron-containing sludge being obtained from an advanced oxidation technology involving an iron-containing reagent. In the present disclosure, through improvements of the subsequent overall treatment process, the reuse mode and specific reaction condition parameters of the respective subsequent treatment process steps of the iron-containing sludge cake, the problem of sludge cake treatment and disposal at the end of the existing sludge treatment and disposal technology can be effectively solved compared with the prior art, and then the iron-containing sludge cake is utilized to form a composite conditioner for deep dewatering of sludge, which is recycled as a sludge conditioner for sludge treatment, thereby realizing the full utilization of resources.

The present disclosure discloses a sludge composite conditioner based on iron-containing sludge pyrolysis residue as well as a preparation method and use thereof. The sludge composite conditioner comprises iron-containing sludge pyrolysis residue and an oxidant used in combination with the iron-containing sludge pyrolysis residue, in which the iron-containing sludge pyrolysis residue is pyrolysis residue obtained by dewatering iron-containing sludge to obtain an iron-containing sludge cake and then pyrolyzing the iron-containing sludge cake, the iron-containing sludge being obtained from an advanced oxidation technology involving an iron-containing reagent. In the present disclosure, through improvements of the subsequent overall treatment process, the reuse mode and specific reaction condition parameters of the respective subsequent treatment process steps of the iron-containing sludge cake, the problem of sludge cake treatment and disposal at the end of the existing sludge treatment and disposal technology can be effectively solved compared with the prior art, and then the iron-containing sludge cake is utilized to form a composite conditioner for deep dewatering of sludge, which is recycled as a sludge conditioner for sludge treatment, thereby realizing the full utilization of resources.

Systems and methods for intensive recirculating aquaculture are provided herein. An example system includes water sourced from a first segment of a saline aquifer, a recirculating aquaculture system receiving the sourced water and producing discharge water, and a water discharge point located within second segment of the saline aquifer disposed below the first segment of the saline aquifer.

A method of separating sludges which involves adding an insoluble mineral colloidal suspension into an industrial sludge to destabilize the industrial sludge and separating destabilized components of the industrial sludge. The insoluble mineral colloidal suspension can be adding into the industrial sludge or formed in situ therein by components into the industrial sludge that react together therein to form the insoluble mineral colloidal suspension.

A method of separating sludges which involves adding an insoluble mineral colloidal suspension into an industrial sludge to destabilize the industrial sludge and separating destabilized components of the industrial sludge. The insoluble mineral colloidal suspension can be adding into the industrial sludge or formed in situ therein by components into the industrial sludge that react together therein to form the insoluble mineral colloidal suspension.

A method of separating sludge which involves adding an insoluble mineral colloidal suspension into an industrial sludge to destabilize the industrial sludge and separating destabilized components of the industrial sludge. The insoluble mineral colloidal suspension includes magnesium hydroxide. In an alternative embodiment dry finely divided magnesium hydroxide can be added and then dispersed into an industrial sludge. Conventional flocculants and/or coagulants can also be added. Conventional physical separation processes can be used to separate the destabilized industrial sludge.

A method of separating sludge which involves adding an insoluble mineral colloidal suspension into an industrial sludge to destabilize the industrial sludge and separating destabilized components of the industrial sludge. The insoluble mineral colloidal suspension includes magnesium hydroxide. In an alternative embodiment dry finely divided magnesium hydroxide can be added and then dispersed into an industrial sludge. Conventional flocculants and/or coagulants can also be added. Conventional physical separation processes can be used to separate the destabilized industrial sludge.

A wastewater treatment method and apparatus separating suspended solids in influent wastewater streams, and injecting SO.sub.2 or sulfurous acid into the suspended solids at a pH and dwell time to generate sufficient sulfurous acid with free SO.sub.2, sulfites and bisulfites to self-agglomerate the suspended solids, acid leach heavy metals contained in and on the suspended solids into solution for subsequent separation, condition the suspended solids for chemical dewatering producing a dried biofuel biosolid with less than 10% by weight water and a BTU content between 6,000 and 9,000 BTU/lb., and gasifying or combusting the dried acid treated suspended solids to produce power or energy with reduced greenhouse gas emissions.

A method of dewatering sludge is provided herein. In some embodiments, the method includes introducing micronized dry water soluble polymer (DWSP) particles into a sludge, wherein the sludge includes water and solids; separating water of the sludge from solids of the sludge using the micronized DWSP particles; and collecting a wet solid including water and solids of the sludge, wherein a concentration of solids in the wet solid is higher than a concentration of solids in the sludge, wherein the micronized DWSP particles comprise a DWSP wherein the DWSP is selected from the group consisting of a dry anionic water soluble polymer, a dry cationic water soluble polymer, a dry nonionic water soluble polymer, and mixtures thereof, and wherein a mean particle size of the micronized DWSP particles ranges from about 100 to about 300 microns.

A method of dewatering sludge is provided herein. In some embodiments, the method includes introducing micronized dry water soluble polymer (DWSP) particles into a sludge, wherein the sludge includes water and solids; separating water of the sludge from solids of the sludge using the micronized DWSP particles; and collecting a wet solid including water and solids of the sludge, wherein a concentration of solids in the wet solid is higher than a concentration of solids in the sludge, wherein the micronized DWSP particles comprise a DWSP wherein the DWSP is selected from the group consisting of a dry anionic water soluble polymer, a dry cationic water soluble polymer, a dry nonionic water soluble polymer, and mixtures thereof, and wherein a mean particle size of the micronized DWSP particles ranges from about 100 to about 300 microns.