1 / 11

METHODS FOR INCREASING THE BIOGAS YIELD IN MANURE BASED BIOGAS PLANTS

METHODS FOR INCREASING THE BIOGAS YIELD IN MANURE BASED BIOGAS PLANTS. P. KAPARAJU, N. CHRISTENSEN AND I. ANGELIDAKI ENVIRONMENT & RESOURCES - DTU TECHNICAL UNIVERSITY OF DENMARK BIOGAS FORUM 10 DEC 2004. BACKGROUND. Manure - major substrate resource

gracie
Download Presentation

METHODS FOR INCREASING THE BIOGAS YIELD IN MANURE BASED BIOGAS PLANTS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. METHODS FOR INCREASING THE BIOGAS YIELD IN MANURE BASED BIOGAS PLANTS P. KAPARAJU, N. CHRISTENSEN AND I. ANGELIDAKI ENVIRONMENT & RESOURCES - DTU TECHNICAL UNIVERSITY OF DENMARK BIOGAS FORUM 10 DEC 2004

  2. BACKGROUND • Manure - major substrate resource • Large fraction of TS - Particulate matter • One-step CSTR digestion • Methane yields of 0.2-0.25 m3/kgVS < theoretical yield of 0.4-0.45 m3/kgVS. • BMP Test – Digested material • 5-10% additional methane

  3. RESEARCH APPROACH • Focus EFP-04 project on : 1. Reactor configurations • Serial digestion 2. Operational procedures • Retain degradable material 3. Methods for degradation of undegraded material • Post-treatment • Lab-scale and pilot-scale studies

  4. 15 d HRT 12 + 3 d HRT 1. Reactor configurationSerial digestion • Conversion eff: • low - single step digestion • Split total reactor vol between two CSTR connected in series • Two separate methanogenic reactors • On-going projects: a. Effect of different reactor configuration 90:10, 80:20 & 70:30 Vol. b. Effect of temperature

  5. 1. Reactor configurationa. Effect of different reactor configuration 80:20 & 90:10 • 1-10% HIGHER METHANE PRODUCTION COMPARED TO ONE-STEP PROCESS • HIGHER (20-40%) METHANE PRODUCTION DURING VARIOUS PULSES. • PROCESS MORE ROBUST TO DISTURBANCES

  6. a. Effect of different reactor configuration (contd) Fig. Daily biogas production from reactor R1 operated in parallel and reactors R2 and R3 operated in series

  7. 55 °C 37 °C 55°C 20 °C 1. Reactor configurationb. Effect of temp. on 2-step of serial digestion • Methanogenesis in second-step of serial digestion is dependent on temp. and chemical characteristics of the incoming digestate.

  8. b. Effect of temperature (contd): Fig. The effect of temperature (20-55C) on daily biogas production from reactor R3 operated in series with reactor R2.

  9. 55°C Top 60 cm 97 cm 10°C Top 60 cm 97 cm 2. Operational proceduresPassive solids separation After 1 d

  10. 2. Operational proceduresPassive solids separation Fig. Changes in TS and VS of digested cow manure samples over time from top, middle (60 cm) and bottom (97 cm) of column

  11. 3.Methods for degradation of undegraded materialPost-treatment • Short-term aerobic/composting as post-treatment Acknowledgements: • Chao Pan • Kanokwan • Tore & Jacob • Henar • Hector

More Related