A treatment system and process is described herein to separate constituent parts from aqueous-based products or by-products, such as wastewater from a cellulosic ethanol process. The treatment system may include an ultrafiltration system, a first reverse osmosis system and a second reverse osmosis s
A treatment system and process is described herein to separate constituent parts from aqueous-based products or by-products, such as wastewater from a cellulosic ethanol process. The treatment system may include an ultrafiltration system, a first reverse osmosis system and a second reverse osmosis system. The treatment system may be configured to operate in modified batch mode.
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1. A treatment process, comprising: collecting an aqueous-based by-product, wherein the by-product comprises members selected from the group consisting essentially of whole stillage, thin stillage, temulose, and combinations thereof; andtreating the by-product by passage through a treatment system i
1. A treatment process, comprising: collecting an aqueous-based by-product, wherein the by-product comprises members selected from the group consisting essentially of whole stillage, thin stillage, temulose, and combinations thereof; andtreating the by-product by passage through a treatment system including an ultrafiltration (UF) system, a first reverse osmosis (RO) system, and a second RO system, wherein concentrates generated from the UF system are recycled to a first receptacle and concentrates from the first RO system and the second RO system are recycled to a second receptacle, the treatment system operating in a modified batch mode. 2. The treatment process of claim 1, wherein the treatment system operates at a rate in the range of about 15 gpm to about 115 gpm. 3. The treatment process of claim 1, wherein the treatment system operates at a temperature in the range of about 40 degrees F. to about 140 degrees F. 4. The treatment process of claim 1, wherein the treatment system operates at a pH in the range of about 2 to about 11. 5. The treatment process of claim 1, wherein the cross flow velocity of the UF system is in the range of about 10 ft/s to about 15 ft/s. 6. The treatment process of claim 1, further comprising removing a retentate from at least one of the first and the second receptacles. 7. The treatment process of claim 1, wherein an analytical composition of the aqueous-based by-product includes a high concentration of one or more contaminants selected from the group consisting of a total dissolved organic and inorganic solid (TDS), a total organic carbon (TOC), a total suspended solid (TSS), a carbonaceous biochemical oxygen demand (CBOD), a metal, and combinations thereof. 8. The treatment process of claim 7, wherein the total organic carbon is less than 50 mg/L. 9. The treatment process of claim 7, wherein the total organic carbon is less than 25 mg/L. 10. The treatment process of claim 7, wherein the total organic carbon is less than 10 mg/L. 11. The treatment process of claim 1, wherein the second RO permeate includes a percentage of water from the initial wastewater in the range of about 90% to about 98%. 12. The treatment process of claim 1, further comprising: directing recycling the concentrates generated from the UF system or the concentrates from the first RO system and the second RO system for use as a fuel or fertilizer. 13. The treatment process according to claim 1, wherein the second RO permeate is substantially free of one or more contaminates selected from the group consisting of a furfural, an organic acid, a total dissolved organic and inorganic solid (TDS), and a total suspended solid (TSS). 14. The treatment process of claim 1, wherein the ultrafiltration system is capable of retaining 99% of the suspended solids. 15. A method of treating wastewater from a cellulosic ethanol process, comprising: pumping a volume of wastewater, including thin stillage, through an ultrafiltration (UF) system to yield a UF permeate;collecting the UF permeate in a receptacle;pumping a volume of receptacle wastewater through a first reverse osmosis (RO) system to yield a first RO permeate; andpumping the first RO permeate through a second RO system to yield a second RO permeate, wherein concentrates from the UF system are recycled to a first receptacle, and concentrates from the first RO system and second RO system are recycled to a second receptacle. 16. The method of claim 15, wherein the thin stillage wastewater contains 0.5-3% total suspended solids and 1-3% of dissolved organic compounds. 17. The method of claim 15, further comprising removing a retentate from at least one of the first and the second receptacles. 18. The method of claim 15, wherein an analytical composition of the volume of wastewater includes a high concentration of one or more contaminants selected from the group consisting of a total dissolved organic and inorganic solid (TDS), a total organic carbon (TOC), a total suspended solid (TSS), a carbonaceous biochemical oxygen demand (CBOD), a metal, and combinations thereof. 19. The method of claim 15, wherein the second RO permeate includes a percentage of water from the initial wastewater in the range of about 90% to about 98%. 20. The method of claim 15, further comprising: directing recycling the concentrates generated from the UF system or the concentrates from the first RO system and the second RO system for use as a fuel or fertilizer.
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