Title:
METHOD AND SYSTEM FOR THE INTEGRAL TREATMENT OF WASTEWATER FROM THE MAIZE INDUSTRY
Document Type and Number:
WIPO Patent Application WO/2014/119990
Kind Code:
A3
Abstract:
The invention relates to a novel integral process for the treatment of wastewater, commonly known as nejayote, from the nixtamal, masa and tortilla industry, comprising an improved method for removing the insoluble fraction and a filtration system for separating and concentrating the fractions forming the nejayote. The method comprises the steps of: (a) neutralising the nejayote; (b) enzymatically hydrolysing the starch granules; (c) flocculating and separating the insoluble fraction. The system comprises the steps of (a) microfiltration; (b) ultrafiltration for concentrating long-chain carbohydrates; (c) ultra/nano filtration for concentrating medium-size compounds; (d) nanofiltration/reverse osmosis for concentrating small molecules and obtaining water of sufficient quality that it can be re-used or safely discharged into the environment. In one embodiment of the invention, in order to remove unwanted phenolic compounds, the process includes a method comprising the steps of: (a) acidifying the effluents at pH <4; (b) flocculating and separating the unwanted insoluble fraction.
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Inventors:
ASAFF TORRES ALI JESÚS (MX)
REYES VIDAL MARÍA YOLANDA (MX)
REYES VIDAL MARÍA YOLANDA (MX)
Application Number:
PCT/MX2014/000039
Publication Date:
November 27, 2014
Filing Date:
January 31, 2014
Export Citation:
Assignee:
CT DE INVESTIGACIÓN EN ALIMENTACIÓN Y DESARROLLO A C (MX)
International Classes:
C02F9/02; C02F101/30; C02F103/32
Foreign References:
| MXPA05008124A | 2007-01-29 | |||
| MXPA05012804A | 2006-06-27 |
Other References:
VALDERRAMA-BRAVO C. ET AL.: "Constant pressure filtration of lime water (nejayote) used to cook kernels in maize processing.", JOURNAL OF FOOD ENGINEERING., vol. 110, no. 3, June 2012 (2012-06-01), pages 478 - 486
Attorney, Agent or Firm:
SABORI SANDOVAL, Pedro Augusto (Colonia Olivares C.P, Hermosillo Sonora, MX)
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