CURRANTS FINISHING WASTEWATER AND VINASSES TREATMENT WITH BIOGAS PRODUCTION IN HIGH RATE ANAEROBIC REACTORS. THE EFFECT OF SO2-3, SO2-4 AND NITROGEN
Abstract
THE ANAEROBIC TREATMENT OF CURRANT FINISHING WASTEWATER IN DAF, UASB AND AFB REACTORS WAS STUDIED. ALSO SULTANAS FINISHING WASTEWATER, WITH AND WITHOUT CA(OH)2 PRETREATMENT FOR SULFITE REMOVAL, WAS STUDIED IN UAF AND UASB REACTORS. THE RESULTS SHOWED THAT CURRANT AND SULTANA FINISHING WASTEWATERS ARE EFFECTIVELY TREATED, PROVIDED THAT SULFITE IS REMOVED BY CA(OH)2 FROM THE LATTER. THE ORDER OF THE FOUR PROCESSES IN TERMS OF COD REMOVAL BECOMES: AFB > UAF < UASB < DAF. ALL REATORS STARTED UP QUITE FAST WITH ACTIVE SEED SLUDGE. GRANULATION IN THE UASB REACTOR IS QUITE EASY AND ACCELERATED WITH LIME ADDITION. DURING THE START UP OF THE UASB REACTOR, MIXING IS REQUIRED TO AVOID PH GRADIENT. BY ADDING A STORAGE AND ACIDIFICATION STAGE WITH A HRT OF, AT LEAST, FOUR DAYS THE CONSUMPTION OF NAOH IS REDUCED BY 30%. WHEN THE ACIDIFICATION TIME OF THE WASTEWATER INCREASES, THE METHANE PERCENTAGE IN BIOGAS IS ALSO INCREASED. THE PRESENCE OF SMALL QUANTITIES OF SULFITE IN THE WAST ...
show more
Download full text in PDF format (8.45 MB)
(Available only to registered users)
|
All items in National Archive of Phd theses are protected by copyright.
|
Usage statistics
VIEWS
Concern the unique Ph.D. Thesis' views for the period 07/2018 - 07/2023.
Source: Google Analytics.
Source: Google Analytics.
ONLINE READER
Concern the online reader's opening for the period 07/2018 - 07/2023.
Source: Google Analytics.
Source: Google Analytics.
DOWNLOADS
Concern all downloads of this Ph.D. Thesis' digital file.
Source: National Archive of Ph.D. Theses.
Source: National Archive of Ph.D. Theses.
USERS
Concern all registered users of National Archive of Ph.D. Theses who have interacted with this Ph.D. Thesis. Mostly, it concerns downloads.
Source: National Archive of Ph.D. Theses.
Source: National Archive of Ph.D. Theses.