Zeng Honghu

The Effects of Different Anaerobic Fermentation Temperature on Biogas Fermentation of Swine Manure

Biogas yields and methane productivity were studied at different temperatures (15¡æ, 20¡æ, 25¡æ, 30¡æ and 35¡æ) by the way of anaerobic fermentation experiment which takes wine manure as biogas fermentation raw material, and take the sediment from rural methane fermentation as inoculate matter. The results indicated that temperature affected the material consumption time, the higher temperature, the faster material consumption, and then, fermentation period was become shorter too. However, more gaseous impurities were produced when anaerobic fermentation temperature increased relatively. Temperature of anaerobic fermentation had a great influence on methane production. Low temperature goes against the production of methane. Biogas yield and methane yield can ascend to the peak quickly at high anaerobic fermentation temperature. Taking into account production efficiency and the quality of digestion, temperature condition of 30 and fermentation period of 31d ¡æ in swine manure anaerobic fermentation are suitable for large scale farms.

The Study of Treating Municipal Sewage by Using Sewer Networks

When wastewater is collected and deliver to sewage treatment plant in sewer network, there are occurring complicate process about physical£¬chemical and biological. It has great impact to organic removal and transformation efficiency where happened during the later treatment process in sewage treatment plant. This essay will describe water quality change in sewer pipe and the technology by using sewer pipe or sewer networks to treat wastewater.