The present disclosure relates to the technical field of microbial electrochemical technology, in particular to a graphene-magnetite conductive skeleton electrode, a preparation method and application thereof, and a method for treating petrochemical wastewater. In the present disclosure, the surface roughness of the graphite rod electrode can be increased by the conductive skeleton modified on the surface of the graphite rod electrode, which is beneficial to the enrichment of microorganisms. The increase in the load of microorganisms will mean the amount of electroactive microorganisms will also increase, which will further improve the electron transfer ability, and because the material of the modified layer is a conductive material, it is also more conducive to the transfer of electrons; at the same time, the conductive skeleton modified on the surface of graphite rod electrode can also further enhance the transmission distance of electrons because of the skeleton constructed.

An iron containing bioreactor for treating explosive compounds and other organics in contaminated surface water is disclosed. The bioreactor can be located either on-ground or in-ground at a location across which contaminated surface water flows. In one configuration the reactor is made up of (i) indigenous microbes, (ii) acetate, (iii) a low density iron-containing bed, and contains anaerobic zones in at least one portion of the flowpath. The reactor reduces the concentration of explosive compounds to below 10 ppb and also maintains this explosive compound reduction level for a period of at least one year without replenishing the microbes or iron.

The invention relates to a method and apparatus for treating water. Iron is removed biologically from humus-rich water with the solution according to the invention. In the method, the water being treated is conveyed through a filter, which filter comprises filter material. Before the water is conveyed to the filter, the pH value of the water is lowered with an acidification part that is included in the apparatus.

A method for treating wastewater comprising subjecting a sulfate containing wastewater to Fe(III) iron dosing in an anaerobic bioreactor containing one or more of an iron reducing bacteria and one or more of a sulfate reducing bacteria, and one or more of a fermentative bacteria, and adjusting a dosage of the Fe(III) iron in the anaerobic bioreactor to achieve a Fe/Sulfate molar ratio that is equal to or greater than 0.50, and removing an effluent from the anaerobic bioreactor that is a treated wastewater. A wastewater treatment system is provided having a wastewater reservoir, a ferric iron solution reservoir, an anaerobic bioreactor, and an effluent reservoir.

Disclosed herein are methods, systems, and devices for generating electricity from an effluent source. In the presence of electrogenic bacteria and substrate electrodes, an electroactive biofilm is produced which possesses bioconductive capacity for efficiently producing an electric current while treating an effluent source such as, e.g., wastewater. This disclosure relates generally to the production of electricity from a biological source. In particular, this disclosure relates to microbial fuel cells (MFCs) and other bioelectrochemical systems (BES) that exploit an exogenous fuel source.

The present invention relates to a method for reducing the aniline content of hypersaline wastewater, said method comprising the steps of (a) providing a composition A comprising hypersaline wastewater and aniline, and (b) contacting composition A with cells of at least one halophilic microbial strain, thereby generating a composition B comprising said composition A and cells of said at least one halophilic microbial strain. The present invention further concerns a method for the production of chlorine and sodium hydroxide. Further encompassed by the present invention is a composition comprising hypersaline wastewater, aniline, and cells of at least one halophilic microbial strain.

Processes and compositions for removal nitrogen, organic and inorganic contaminants from wastewater using Feammox bacterium are provided.

A composition remediation of soil and groundwater containing halogenated compounds. The remediation composition includes an elemental iron-based composition, which may include activated carbon capable of absorbing the halogenated compounds with numerous pores impregnated with elemental iron. The remediation composition further includes a first bioremediation material including a blend of one-to-many organisms capable of degrading the halogenated compounds. The remediation composition includes an organic compound or polymeric substance and a second bioremediation material including a blend of one-to-many organisms capable of degrading the organic compound or polymeric substance over time (e.g., 20 to 365 or more days to provide a time release substrate-creating material or platform) into smaller molecules or compounds used by the organisms in the first bioremediation material while degrading the halogenated compounds. The organic compound may be a complex carbohydrate such as food grade starch, chitin, or other complex carbohydrate such as one with low water solubility.

Systems and methods for actively treating mining wastewater, such as acid mine drainage, using a mixed culture of iron oxidizing bacteria, in a manner that results in both remediation of the water and the production of a useful end product. Exemplary systems and methods employ a reaction vessel where the bacteria can oxidize the iron in the mining wastewater for some amount of time, and a settling tank into which reacted water may be transferred and retained to permit iron oxyhydroxide contained in the water to settle as iron oxyhydroxide sludge. The iron oxyhydroxide sludge may be dried to produce iron oxyhydroxide solids that can be employed in the manufacture of a usable pigment.

The present disclosure provides a method for promoting degradation of polychlorinated biphenyls (PCBs) by Pseudomonas JD37 with nanoscale zero-valent iron (nZVI) and use thereof. The method includes the following steps: adding nZVI and Pseudomonas JD37 in an environment having PCBs, and promoting degradation of the PCBs by the Pseudomonas JD37 with the nZVI. The nZVI increases an active oxygen content produced by extracellular metabolism of the Pseudomonas JD37, thus promoting degradation of the PCBs. Therefore, the method of the present disclosure is suitable for degrading the PCBs in water and soil for environmental restoration.