Abstract
This paper reports the effects of anaerobic treatment for synthetic wastewater and SO2−+Ca2+- rich single-cell protein (SCP) wastewater in a factory. The results show that with the increase of SO2−4+Ca2+concentration, methane productivity will decrease, and that Ca2+ affects the COD removal in wastewater greatly. However, if certain compounds are added in, and acclimated, these disadvantages will be overcome satisfactorily. For SCP wastewater, the COD removal efficiency can reach 75% and methane productivity 260-320 1 CH4/kg COD under the conditions of fermentation temperature of 36±l°C and COD volume loading of 2.3-2.8 kg/m3d. Besides, the purified wastewater can basically be reclaimed.
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