Provided herein are methods of organic waste stream conversion including fermenting an organic waste stream with an inoculum using arrested methanogenesis to generate an organic product. The inoculum includes an anaerobic consortium isolated from cheese, yogurt, saline soil, kefir, and/or probiotics and the anaerobic consortium is pretreated to transform the anaerobic consortium into an acidogenic consortium.

The present invention relates to water treatment process using pyrophylite ceramic membrane which purifies contaminant from wastewater by applying the pyrophylite ceramic membrane with immersion type, more particularly, in the water treatment process using the pyrophylite ceramic membrane including pyrophylite with 80 weight and alumina with 20 weight, characterized that comprises a S-1 step which pyrophylite ceramic membrane 10 is embedded and raw water is supplied to a reactor 100 blocked from outside, a S-2 step which obtains permenate water by operating suction pump 130 connected with the pyrophylite ceramic membrane 10, a S-3 step which recovers gas generated from the reactor 100 and a S-4 step which circulates part of gas generated from the reactor 100 to the reactor 100.

A method for reducing recalcitrant chemical oxygen demand (COD) of a liquid in a water system is provided. The method comprises pretreating the liquid in a pretreatment unit (12) to remove indigenous bacteria or microbes to a population level below which the indigenous organisms can interfere with the screened and externally introduced microorganisms. The liquid is then provided to a reactor (20) that has a filter bed (22) formed with a carrier material (26). Special microbes are screened and used to colonize the carrier material (26) to remove recalcitrant COD. A biofilm is cultured on the surface of the carrier material (26) to immobilize the screened microbes in the reactor (20). The method further comprises adding a co-substrate as the liquid enters the reactor (20) and percolating the liquid through the filter bed (22) colonized with the screened microbes to degrade at least part of the recalcitrant COD under aerobic conditions. The screened microbes comprise at least one microbial species selected from the group consisting of Bacillus, Comamonas, Arthrobacter, Micrococcus, Pseudomonas, Pediococcus, Achromobacter, Flavobacterium, Mycobacterium, Rhodanobacter, Stenotrophomonas and yeast.

An apparatus has a plurality of gas transfer membranes. The apparatus floats in water with the membranes submerged in the water. To treat the water, a gas is supplied to the membranes and is transferred to a biofilm supported on the membranes or to the water. Gas is also used to supply mixing or membrane scouring bubbles to the water. The mixing or scouring bubbles can be provided by a cyclic aeration or other gas supply system, which optionally provides gas at a variable pressure to the membranes in parallel or series with an aerator. Condensates can be removed from the membranes, and exhaust gasses from the membranes can be monitored, optionally through one or more dedicated pipes.

In one embodiment, a dilute wastewater treatment system includes a separation subsystem configured to receive dilute wastewater and separate it into a product stream containing a low concentration of organic material and a reject stream containing a high concentration of organic material, and a conversion subsystem configured to receive the reject stream from the separation subsystem and anaerobically treat the reject stream to break down the organic material and separate it from water within the reject stream.

A system is provided for treating contaminated water. The system includes a bioreactor having an outlet for treated water and a filter coupled to receive treated water from the outlet of the bioreactor. The filter is configured to operate in an anoxic mode. The filter has: (a) a vessel configured to receive the treated water, (b) a membrane associated with the vessel and positioned to extract permeate from the received water, (c) a fluid outlet positioned to direct fluid toward the membrane to inhibit film build up on the membrane, (d) a fluid recirculator positioned to recirculate fluid between the vessel and the fluid outlet, and (e) an oxidant supply positioned to introduce an oxidant into the vessel, the oxidant supply being adjustable to control the oxidation-reduction potential of the received water in the vessel within a predetermined range.

An anaerobic bioreactor with electrolytic regeneration system, method and apparatus for monitoring pH levels which is simultaneously efficient in both anaerobic digestion and optimized filtration process is disclosed. To maintain the pH stability of an anaerobic bioreactor, an electrolysis process is integrated with the bioreactor. The integration of an electrolysis process with the bioreactor sustains the pH in the optimized range for anaerobic process while enhancing the removal of contaminants in the bioreactor, augmenting biogas production, and mitigating fouling.

Provided herein are methods and systems for water purification from oxyanions, nitrate in particular, by Donnan dialysis unit coupled with a bioreactor, to allow the uninterrupted or minimally interrupted operation of the technological assembly.

A methane fermentation system which can efficiently generate methane gas is provided. The methane fermentation system decomposes an organic waste with an anaerobic microorganism to cause methane fermentation so as to generate the methane gas. The methane fermentation system includes a wet bead mill which finely pulverizes the organic waste. The methane fermentation system also includes a methane fermentation chamber in which the organic waste finely pulverized in the wet bead mill is decomposed with the anaerobic microorganism to cause the methane fermentation so as to generate the methane gas.

A fluidized bed reactor for ammonia laden wastewater includes a column, a plurality of carrier particles, a first settling tank and a fluidizing means. The column defines a fluidizing chamber therein, and the fluidizing means is adapted for introducing the ammonia laden wastewater into the fluidizing chamber and further into the first settling tank. The reactor is further provided with microorganisms including nitrifying bacteria, anammox bacteria and heterotrophic denitrifying bacteria attached to the carrier particles. Nitrification reaction, anammox reaction and heterotrophic denitrification reaction are simultaneously taking place in the fluidizing chamber to transform ammonia into nitrogen by the microorganisms. A method for treating ammonia laden wastewater is also provided. The fluidized bed reactor is advantageous in the fact that its start-up is significantly shortened and it is adapted to efficiently treat thin ammonia laden wastewater.