Method for improving hydrogen gas yield of kitchen waste anaerobic digestion
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A technology for kitchen waste and anaerobic digestion, applied in biological sludge treatment, waste fuel, fermentation, etc., can solve the problem of high cost, and achieve the effect of reducing production cost, improving hydrogen yield and simple operation.
Inactive Publication Date: 2008-08-27
TONGJI UNIV
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The problem with this method is the high cost
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Embodiment 1
[0023] Please refer to the attached figure 1 .
[0024] The granular sludge was acclimatized before the experiment. The domestication step is as follows: granular sludge: food waste = 1 dry weight: 0.2-0.4 dry weight, put the granular sludge in a glass bottle, add food waste and fill the bottle with nitrogen or argon, Seal the mouth of the bottle and culture it statically at 4-20°C. When the pH drops to 4.5-5.5, the acclimatization is over and it is ready for use. In order to better understand the effects of heat treatment and non-heat treatment methods on hydrogen production under the process conditions, a control group and an experimental group were set up in this experiment.
[0025] The experimental group took five 300ml serum bottles, weighed 7.8 g (dry weight) of broken kitchen waste in each bottle, and then filled each bottle with 0.46, 0.92, 1.38, 1.84, and 2.30 g of domesticated waste. mud (dry weight), and then add distilled water to each bottle to adjust the conc...
Embodiment 2
[0032] The granular sludge was acclimatized before the experiment. The domestication step is as follows: granular sludge: food waste = 1 dry weight: 0.2-0.4 dry weight, put the granular sludge in a glass bottle, add food waste and fill the bottle with nitrogen or argon, Seal the mouth of the bottle and culture it statically at 4-20°C. When the pH drops to 4.5-5.5, the acclimatization is over and it is ready for use. In order to better understand the effects of heat treatment and non-heat treatment methods on hydrogen production under the process conditions, a control group and an experimental group were also set up in this experiment.
[0033] The experimental group took five 300ml serum bottles, weighed 7.8g (dry weight) of broken kitchen waste in each bottle, and then filled each bottle with 0.46, 0.92, 1.38, 1.84, 2.30g of domesticated particles Sludge (dry weight), then fill with inert gas and seal the bottle. Place it in a constant temperature oscillation box at 40-50°C...
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Abstract
The invention relates to a method for increasing the hydrogen output through anaerobically digesting restaurant garbage and relates to a method for producing the hydrogen output through anaerobically digesting the restaurant garbage, which comprises following steps: firstly, weighing according to granular sludge: the restaurant garbage=1:0.2-0.4 part dry weight, adding the granular sludge and the restaurant garbage into a bottle, filling nitrogen or argon, sealing, statically culturing under the temperature of 4-20DEG C, finishing domestication when the pH value is lowered to 4.5-5.5, preserving, then, weighing according to the restaurant garbage: the granular sludge which is domesticated well=1 part dry weight:0.59-0.294part dry weight, then, arranging the restaurant garbage and the granular sludge into a container, evenly mixing, filling the nitrogen or the argon, then, sealing, concussing and stirring under the temperature of 40-50DEG C and the speed of 100-130r / min, starting anaerobic digestion, wherein the hydrogen yield is 65.63mL / g VS-94.04mL / g VS, fermenting firedamp with residual material after the hydrogen stops producing, and transforming the residual material into the firedamp. The method of the invention has the characteristics of low energy consumption, low cost and high heat value net output rate, and the hydrogen yield can reach 93mL / g restaurant garbage (dry weight) through using the method of the invention, which is increased by 20-30% compared with existing hydrogen yield.
Description
technical field [0001] The invention relates to a method capable of increasing the amount of hydrogen produced by anaerobic digestion of kitchen waste. Specifically, the domesticated granular sludge is used as an inoculum, the kitchen waste is used as a fermentation substrate, and the granular sludge does not need to be heat-treated (90 ~ 100°C, 20-30 minutes) can increase the hydrogen production rate of kitchen waste. It belongs to the field of solid waste recycling. Background technique [0002] Kitchen waste is the main source of organic phase in municipal solid waste, and it is generally produced in enterprises, institutions, schools, farmers' markets, supermarkets and catering service industries. Taking Beijing, Shanghai, Guangzhou and other big cities as examples, the daily output of kitchen waste exceeds 1,000 tons. Food waste is mainly composed of organic substances such as starch, dietary fiber, and animal fat, and has the characteristics of high moisture, high fa...
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