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With fatty acid as raw material, using the two-step method, first, we use concentrated H2SO4 as a catalyst for esterification of fatty acid and methanol to reduce AV (acid value), and then we added methanol into the peristaltic pump to make its AV drop to below 1 mg KOH /g oil. The best condition of first stage: the temperature is 65±2°C, the catalyst dosage is 1%, the methanol to fatty acid ratio...
Eupatorium adenophorum Spreng can potentially be utilized in several bioenergy pathways. When pretreated with microbial inoculum, it can be used as biogas fermentation material, which could increase the biogas production velocity. Eupatorium adenophorum Spreng is a promising potential biogas feedstock, whose rate of gas generation is 180 (m3-t_1TS) and fuel conversion efficiency is 12.37% at 30°C...
Used Tween-80 as emulsifler, industrial lipase as catalyst to hydrolyze waste oil from restaurants and make mixed fatty acid. We discussed the enzyme concentration, substrate concentration, temperature and time on hydrolysis. Through the experiment, we found that when we used emulsifier which contains 2% oil in the system, we could get the optimal parameter for hydrolysis of waste oil from restaurants...
The performances of three anaerobic filters (AF) with different types of supporting media (soft and hard packing double-media (SHM), hard packing media (HM) , and soft packing media(SM)) were evaluated through their ability to remove organic compounds in winery wastewater and biogas energy recovery. When hydraulic retention time (HRT) is 10 days and volume organic loading rate (OLR) is 9.02kgCOD/m...
In the straw biogas fermentation with high concentration, ratio of nitrogen and amount of seeding material have significant effect. Experiments show that gas production is very high in early time when the urea addition level is 2.5% or 3.0%, but the methane content of gas is less than 45%. when the urea proportion is 3.5%, the gas production curve is gently, the fermentation starting time is short...
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