Full Ni­tro­gen Re­moval Through Mi­crovo Tech­nol­ogy

Chemical Industry Digest - - New Developments -


Oro Loma San­i­tary District in San Lorenzo, Cal­i­for­nia, part­nered with green tech­nol­ogy com­pany, Mi­crovi Biotech, Inc. and wastew­a­ter spe­cial­ists, WesTech En­gi­neer­ing, Inc. to show­case a large-scale demon­stra­tion of the Mi­crovi MNE so­lu­tion for Oro Loma’s wastew­a­ter treat­ment plant.

This tech­nol­ogy uses novel bio cat­alytic com­pos­ites (bio­cat­a­lysts) that in­ten­sify bi­o­log­i­cal pro­cesses, while main­tain­ing a con­trolled pop­u­la­tion of tar­geted micro­organ­isms at a much higher den­sity than ex­ist­ing tech­nolo­gies.

The demon­stra­tion’s pri­mary ob­jec­tive was to tackle in­creased ni­tro­gen dis­charge lim­its in the San Fran­cisco Bay Area. The district is us­ing the demon­stra­tion to proac­tively eval­u­ate cost-ef­fec­tive new tech­nolo­gies to meet these pro­jected ef­flu­ent lim­its, pos­si­bly as low as <6 mg/L of to­tal ni­tro­gen (TN).The demon­stra­tion show that the com­bined ni­tri­fi­ca­tion-den­i­tri­fi­ca­tion process can achieve ef­flu­ent lev­els con­sis­tently be­low 3 mg/L and even as low as 1 mg/L from in­flu­ent am­mo­nia (NH3) con­cen­tra­tions as high as 45 mg/L, with an un­prece­dented re­ten­tion time of un­der two hours. The next phase of the Oro Loma demon­stra­tion will fo­cus on side-stream treat­ment of am­mo­nia con­cen­tra­tions as high as 500 mg/L.

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