Biogas Production of Ozone and/or Microwave-Pretreated Canned Maize Production Sludge

Abstract

The production of canned maize is accompanied by formation of large volumes of waste water, with high contents of starch, and high chemical-and biochemical oxygen demand. In our work the effects of acidic, microwave and ozone pretreatment on the biogas production and aerobic biodegradability of canned maize production sludge were examined and the energy balance of the processes were determined when different sludge pretreatments were used. It was found that ozone treatment decreased the chemical oxygen demand, while the biochemical oxygen demand and the aerobic biodegradability increased. The combination of microwave and ozone treatment increased the biodegradability relative to ozone treatment alone.

Comparison of the effects of microwave irradiation with different intensities on the biodegradability of sludge from the dairy- and meat-industry

“…During the mechanical pre-treatment of the sludge, the microbial cell wall is disrupted by shear stress or by sonication (Bougrier et al, 2006;Müller et al, 1998;Weemaes and Verstreate, 1998;Zhu and Beland, 2006). The chemical, thermo-chemical and oxidation treatments are also suitable for disintegrating of sludge, resulting increased solubilization efficiency and enhanced degradation of the macromolecules to low molecular-weight compounds (Beszédes et al, 2009;Park et al, 2004). Thermal treatments and its combination with alkaline or acidic treatment are widely used in sludge management.…”

Enhanced Soluble Protein and Biochemical Methane Potential of Apple Biowaste by Different Pretreatment

“…This will improve the hydrolysis of the organic matter, accelerate the AD process, increase the biogas production, as well as reduce the digestion time and the amount of final residuals (Beszédes et al 2009). …”

Microwave irradiation – A green and efficient way to pretreat biomass

“…After comparing acidic, microwave and ozone pretreatment on canned maize production sludge, Beszédes et al (2009) found that the combined pretreatment process with microwave and ozone could achieve higher biodegradability than single ozone treatment. However, it was also observed that MWI alone had no effect on biogas production.…”