[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Ethanol Wastewater Treatment

Marvin Fleischman, Industrial Assessment Center, Department of
Chemical Engineering, University of Louisville, Louisville, KY
40292, 502/852-6357, FAX:502/852-6355, email:m0flei01@ulkyvm.
*** Forwarding note from MAILER  --ULKYVM   03/17/98 14:11 ***
Return-Path: <owner-p2tech@SUPERIOR.GREAT-LAKES.NET>
V1.2c/1.8c) with BSMTP id 5389; Tue, 17 Mar 1998 14:11:34 -0500
Received: from superior.great-lakes.net by ULKYVM.LOUISVILLE.EDU
   (IBM VM SMTP V2R3) with TCP; Tue, 17 Mar 98 14:11:26 EST
Received: (from majordom@localhost)
        by superior.great-lakes.net (8.8.7/8.8.7) id OAA02813
        for p2tech-outgoing; Tue, 17 Mar 1998 14:07:27 -0500 (EST)
X-Authentication-Warning: homer.louisville.edu: Host er314.spd.louisville.edu
 [] claimed to be ulkyvm.louisville.edu
Message-ID: <350EC891.85FEE56E@ulkyvm.louisville.edu>
Date: Tue, 17 Mar 1998 14:01:38 -0500
From: marvin fleischman <m0flei01@ulkyvm.louisville.edu>
Organization: Dept. of Chemical Engin., University of Louisville, Louisville,
 40292, 502/852-6357, FAX: 502/852-6355
X-Mailer: Mozilla 4.04 [en] (Win95; I)
MIME-Version: 1.0
To: p2tech <p2tech@great-lakes.net>, m0flei01@ulkyvm.louisville.edu
Subject: Ethanol Wastewater Treatment
Content-Type: text/plain; charset=iso-8859-1
Sender: owner-p2tech@great-lakes.net
Precedence: bulk
Reply-To: marvin fleischman <m0flei01@ulkyvm.louisville.edu>
List-Name: P2Tech
Content-Transfer-Encoding: quoted-printable
X-MIME-Autoconverted: from 8bit to quoted-printable by superior.great-lakes.net
 id OAB02813

We are evaluating 2 p2 opportunities at a plant that recovers ethanol
from alcoholic and sugar bearing liquids, and seek some information,
opinions, and contacts regarding technical & economic feasibility for
replacing a barometric condenser on the evaporator and reducing BOD in
evaporator condensate and alcoholic beverages discharged to the POTW.
Both the cooling water from the barometric condenser and the effluent
contain ethanol, acetic acid, citric acid, and sugars and possibly
aldehydes and ketones. Flow to the POTW is about 29 gpm.

 The barometric condenser uses recirculating cooling water and may be
responsible for fouling and foaming in the cooling tower and corrosion
of cooling tower wood and the concrete floor around the basin.  What can
be used to replace the barometric condenser, and who are some vendors of
such systems/equipment?  Currently the vacuum on the 4th evaporator
effect is enhanced by a vacuum pump.

Regarding methods for reducing effluent BOD & perhaps reusing the
treated water, the following seem like possibilities:
=B7 Membrane separations, probably reverse osmosis. Could the resultant
concentrate be fed back to either the fermenter, distillation column, or
=B7 Chemical oxidation - ozone, hydrogen peroxide - with or without
=B7 Biological treatment - ponds/lagoons, central treatment plant -
trickling filter type, rotating disc biological contactor, bio-roughing
tower, etc. - Sufficient land is available on-site for an oxidation pond