Process for the reclamation of process water from process wastewater generated in the battery manufacturing industry and other metals related industries
OwnerCharles M. Suenkonisinventor
Life of this patent
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Abstract
A process wastewater treatment plant, and a process relating thereto, which converts process wastewater generated in battery manufacturing and the like into clean process water and sodium sulfate salt by treating the process wastewater to remove impurities and contaminants, including debris, oil/grease, heavy metal oxides, lead and other heavy metals, suspended solids, bacteria, organic compounds, and/or gases, from the wastewater to produce a clean neutral sodium sulfate brine, subjecting the brine to heat to obtain distilled water and sodium sulfate salt, and purifying the distilled water by reverse osmosis for reuse as clear process water.
Claims9
A process for converting sulfuric acid based process wastewater generated in battery manufacturing into clean process water and sodium sulfate salt, comprising the steps of
- treating the process wastewater to remove impurities and contaminants, including debris, oil/grease, heavy metal oxides, lead and other heavy metals, suspended solids, bacteria, organic compounds, and/or gases, from the wastewater to produce a clean neutral sodium sulfate brine, and
- subjecting the brine to heat to produce distilled water and sodium sulfate salt wherein the subjecting the brine to heat step includes evaporating a portion of the brine to produce steam and a concentrated sodium sulfate brine, harvesting sodium sulfate salt from the concentrated sodium sulfate brine, and collecting distilled water as the steam produced during evaporation cools.
A process for converting sulfuric acid based wastewater generated in battery manufacturing into clean process water and sodium sulfate salt, comprising the steps of
- separating debris, oil/greases, and heavy metal oxide sediments from the wastewater,
- chemically treating the wastewater to neutralize acid in the wastewater, to coprecipitate iron and other heavy metals in the wastewater into precipitate, and to adsorb heavy metals in the wastewater onto iron solids precipitate,
- separating the heavy metal precipitate from the wastewater,
- filtering the wastewater to remove suspended solids,
- subjecting the wastewater to ultraviolet light to kill bacteria in the wastewater,
- removing trace organic compounds from the wastewater,
- adjusting the pH of the wastewater to promote conversion of carbonates and bicarbonates in the wastewater into carbon dioxide,
- removing gases from the wastewater,
- evaporating a portion of the wastewater to produce steam and a concentrated sodium sulfate brine,
- harvesting sodium sulfate salt from the sodium sulfate brine,
- collecting distilled water as the steam produced during evaporation cools,
- purifying the collected distilled water, and
- transporting the distilled water to a holding tank for reuse as process water.
Dependencies are inferred from the claim text.