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SUMMARY:Batch anaerobic co-digestion of cow dung and donkey manure
DTSTART;VALUE=DATE-TIME:20110714T150000Z
DTEND;VALUE=DATE-TIME:20110714T170000Z
DTSTAMP;VALUE=DATE-TIME:20260711T211854Z
UID:indico-contribution-4883@events.saip.org.za
DESCRIPTION:Speakers: Patrick Mukumba (University of Fort Hare)\nBiogas fr
 om anaerobic digestion can be a solution to current and future energy need
 s in South Africa. One option for improving biogas yield of anaerobic dige
 stion of organic matter is co-digestion. Cow dung and donkey manure were c
 o-digested together at different mixing ratios. Total Solids (TS) and vola
 tile solids (VS)\, ammonia-nitrogen\, pH\, alkalinity\, volatile fatty aci
 ds (VFA) and chemical oxygen demand (COD) were determined by using the sta
 ndard methods of the American Public Health Association (ALPHA). The press
 ure of the biogas was measured daily by means of a pressure gauge fixed on
  top on the batch biogas digester. Methane and carbon dioxide contents in 
 the biogas were sensed by non-dispersive infra red sensors. Palladium/Nick
 el sensors were used for sensing hydrogen and hydrogen sulphide in biogas.
  Highest biogas yield was obtained for a mixing ratio of 50% cow dung to 5
 0% donkey manure\, however lowest biogas yield was obtained from cow dung.
  For all the substrates the gas yield increased with time and then attains
  a constant value. However the co-digestion of cow dung and donkey manure 
 attained maximum gas yield on 24th day while for cow dung it was on 28th d
 ay and for donkey manure it was on 26th day. Co-digestion of cow dung and 
 donkey manure increased the gas yield by about 43%. Pure samples produced 
 less biogas than co-digested samples.  There was a strong positive relatio
 nship between gas production and % of co-substrates used (R2 = 0.999). The
  biogas produced from co-digestion can be a solution to lack of energy in 
 rural areas in Eastern Cape Province of South Africa where plenty of donke
 ys and cattle are kept.\n\nhttps://events.saip.org.za/event/7/contribution
 s/4883/
LOCATION: Asteria
URL:https://events.saip.org.za/event/7/contributions/4883/
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