[Start-up of high solid anaerobic digestion process for treating straw with sludge cake as nitrogen additive].

Straw co-digestion with sludge cake as nitrogen additive from wastewater treatment plant (WWTP) can solve the pollution problems of improper treatment of straw and sludge. Moreover the products, including biogas and organic manures, can relieve the problems of energy supply and soil infertility in countryside. The properties of the start-up periods of two anaerobic digestors were studied.

[Research on single phase high solid anaerobic digestion of organic fraction of municipal solid wastes].

Under mesophilic condition (35 degrees C), a bench-scale experiment based on high solid anaerobic digestion process was conducted in a fed-batch single phase reactor to treat the OFMSW. The experiment has lasted for more than half a year and significant results were obtained. At the start-up stage, acidification occurred and showed large inhibition to gas production and the gas production rate once dropped to 0.

[Experimental investigation of the straw pre-treatment to enhance its high solid anaerobic digestion].

The straw contains a high content of lignin, which cannot be well utilized by anaerobic bacteria in high solid anaerobic digestion process. This paper presents the experimental investigation of the straw pre-treatment, which aims to destroy the complex structure of the lignin to enhance its high solid anaerobic digestion. The straw is pre-treated in different solutions including NaOH, ammonia, H2SO4, and carbamide.

[Start-up research of single phase high solid anaerobic digestion technology for organic waste].

Under mesophilic condition (35 degrees C), a bench-scale experiment based on high solid anaerobic digestion process was conducted in a fed-batch single phase reactor. At the start-up stage, the feeding amount of organic waste was modified with the variation of pH value and gas production. The results of this stage showed that 705.

[Fundamental properties of fly ash from municipal solid waste incineration].

Fundamental properties and the factors that influence the distribution of heavy metals of several fly ashes are analyzed. Experiments indicate that the structures are complex and the properties are changeable. The study results show that the chemical composition is Cl, Ca, K, Na, Si, Al, O, etc, and heavy metals are Zn, Pb, Cr, Cu etc.

[Immobilization technology and mechanism of fly ash using H3PO4].

Chemical composition and toxicity leaching characteristics of fly ash was analyzed. The experiment results show that many heavy metals were contained; leaching concentration of Pb is 67.03 mg/L, which exceeds the limit of identification standard for hazardous wastes.