Exploitation of olive mill wastewater and liquid cow manure for biogas production

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2010.02.035· OSTI ID:21457154

Dareioti, Margarita A; Dokianakis, Spyros N; Stamatelatou, Katerina; Zafiri, Constantina ^[1]; Kornaros, Michael ^[1]

---

1. Department of Chemical Engineering, University of Patras, 1 Karatheodori St., GR 26500 Patras (Greece)

Co-digestion of organic waste streams is an innovative technology for the reduction of methane/greenhouse gas emissions. Different organic substrates are combined to generate a homogeneous mixture as input to the anaerobic reactor in order to increase process performance, realize a more efficient use of equipment and cost-sharing by processing multiple waste streams in a single facility. In this study, the potential of anaerobic digestion for the treatment of a mixture containing olive mill wastewater (OMW) and liquid cow manure (LCM) using a two-stage process has been evaluated by using two continuously stirred tank reactors (CSTRs) under mesophilic conditions (35 {sup o}C) in order to separately monitor and control the processes of acidogenesis and methanogenesis. The overall process was studied with a hydraulic retention time (HRT) of 19 days. The digester was continuously fed with an influent composed (v/v) of 20% OMW and 80% LCM. The average removal of dissolved and total COD was 63.2% and 50%, respectively. The volatile solids (VS) removal was 34.2% for the examined mixture of feedstocks operating the system at an overall OLR of 3.63 g CODL{sub reactor}{sup -1}d{sup -1}. Methane production rate at the steady state reached 0.91 L CH{sub 4}L{sub reactor}{sup -1}d{sup -1} or 250.9 L CH{sub 4} at standard temperature and pressure conditions (STP) per kg COD fed to the system.

• OSTI ID: 21457154
• Journal Information: Waste Management, Vol. 30, Issue 10; Other Information: DOI: 10.1016/j.wasman.2010.02.035; PII: S0956-053X(10)00148-0; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
AIR POLLUTION ABATEMENT
ANAEROBIC DIGESTION
GREENHOUSE GASES
HOMOGENEOUS MIXTURES
LIQUID WASTES
MANURES
MESOPHILIC CONDITIONS
METHANE
OLIVES
STEADY-STATE CONDITIONS
WASTE PROCESSING
WASTE WATER
AGRICULTURAL WASTES
ALKANES
BIOCONVERSION
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
DIGESTION
DISPERSIONS
FOOD
FRUITS
HYDROCARBONS
HYDROGEN COMPOUNDS
MANAGEMENT
MATERIALS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC WASTES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
PROCESSING
WASTE MANAGEMENT
WASTES
WATER