Abstract: The present invention discloses a method for promoting methane production by anaerobic digestion in a high ammonia-nitrogen habitat using a biochar with a high carbon-to-nitrogen (C/N) ratio. In this method, a biochar material prepared by dry distillation and carbonization is added to municipal sludge for medium-temperature anaerobic digestion treatment, which increases the efficiency of methane production from sludge by anaerobic digestion in different ammonia-nitrogen stress habitats, thereby realizing the utilization of sludge as resources.

Abstract: Disclosed is a method for recovering phosphorus from sludge rich in chemical phosphorus precipitates using a high-protein biomass waste, comprising introducing the sludge rich in chemical phosphorus precipitates into an anaerobic fermenter, adding a certain amount of a high-protein biomass by-product, sealing the fermenter and fermenting for 4-7 days. The method can effectively increase the phosphorus release efficiency from the sludge, and also generate volatile short-chain fatty acids and ammonia nitrogen in high concentrations. After dewatering, phosphorus and part of ammonia nitrogen can be recovered in a form of high-purity struvite crystals only by addition of a magnesium salt and adjustment of pH to 7.5-9.0. The volatile short-chain fatty acids can be used as an economical carbon source. The method allows simultaneous utilization of two solid wastes to recover carbon, nitrogen and phosphorus resources, and can reduce the usage of chemical reagents, saving the treatment cost.

Abstract: A method and device for generating video slides, which relate to the technical field of picture and video processing, comprising: selecting pictures for generating video slides; creating and displaying a time axis, the selected pictures being distributed on the time axis according to a time sequence corresponding to time attributes of the pictures; receiving user settings for playing effects of subsequently generated video slides, wherein, the settings comprise settings for changing locations of the selected pictures on the time axis; generating the video slides according to the playing effects of the settings so as to play the selected pictures according to a location sequence on the time axis. The invention is suitable for a situation where playing effects of the video slides generated from pictures can be set conveniently.

Abstract: A method and device for generating video slides, which relate to the technical field of picture and video processing, comprising: selecting pictures for generating video slides; creating and displaying a time axis, the selected pictures being distributed on the time axis according to a time sequence corresponding to time attributes of the pictures; receiving user settings for playing effects of subsequently generated video slides, wherein, the settings comprise settings for changing locations of the selected pictures on the time axis; generating the video slides according to the playing effects of the settings so as to play the selected pictures according to a location sequence on the time axis. The invention is suitable for a situation where playing effects of the video slides generated from pictures can be set conveniently.