Recycling and reuse of the hottest sludge recyclin

2022-07-30
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In July, 2011, Rongsheng Paper Co., Ltd. invested 31.66 million yuan to implement the papermaking sludge reuse project. After the papermaking wastewater passes through the air flotation tank, the slurry is separated, and the fine fibers float on the water surface under the action of gravity. These fine fibers can be scraped out and transported to the papermaking workshop, which can be used as raw materials to reliably solve the noise problem at the industrial site. Since the sludge recycling and papermaking project was put into operation for more than half a year, luxianggen, deputy general manager of Rongsheng paper, has calculated two accounts, one economic account and one environmental protection account. Both accounts are very cost-effective

Rongsheng Paper Co., Ltd. in Pinghu Economic Development Zone has seen that small fibers are being transported to the paper workshop of the enterprise due to the national policies and measures to promote the adjustment of economic structure, support scientific and technological progress, and pay attention to people's livelihood. These small fibers come from the sludge in paper-making wastewater, and now they have become the raw materials of paper-making. The sludge recycling project of the enterprise has been put into operation for more than half a year. 9000 tons of waste pulp can be reused throughout the year, and the economic benefit has increased by 8.03 million yuan

new ideas for sludge recycling

for paper enterprises, sludge treatment is a difficult problem. The amount of sludge produced by a large amount of sewage after treatment is amazing. Many enterprises once buried the sludge in the open air, or even piled it at random, causing secondary pollution of the sludge. At the beginning of last year, the provincial environmental protection department formulated a five-year plan for standardized sludge disposal of industrial enterprises in the province. By 2015, key industrial enterprises with an annual sludge output of more than 100 tons in the five industries of chemical industry, pharmacy, printing and dyeing, tanning and papermaking must fully realize the harmless utilization and disposal of sludge

at present, the standardized treatment of sludge in China includes sludge incineration, sludge brick making, sludge solidification and other methods, but relevant environmentalists point out that these treatment methods are not once and for all

taking Rongsheng paper industry as an example, the daily papermaking wastewater reaches 3000 tons. The wastewater is precipitated by adding chemicals in the sedimentation tank, resulting in a large amount of sludge. 90% of the sludge is fine fiber. After sedimentation and pressure filtration, the fine fiber is transported out by car for landfilling. This treatment mode is not environmentally friendly, and the cost is high

if these fine fibers are retained and recycled for papermaking, they can not only reuse resources, reduce pollution, but also increase enterprise benefits. Luxianggen, deputy general manager of Rongsheng paper, told us that the company specially learned from Japanese paper companies. In july2011, the company invested 31.66 million yuan to implement the papermaking sludge reuse project. After the papermaking wastewater passes through the air flotation tank, the slurry is separated, and the fine fibers float on the water under the action of gravity. These fine fibers can be scraped out and transported to the papermaking workshop as raw materials

economic accounts and environmental accounts are very cost-effective

since the sludge recycling and papermaking project was put into operation for more than half a year, Lu Xianggen has calculated two accounts, one economic account, one environmental account and both accounts are very cost-effective

according to the previous sludge treatment mode, Rongsheng paper needs to transport 25 vehicles of sludge every day, with a freight of 80 yuan per vehicle. Calculated based on 360 days, the freight can be automatically saved throughout the year: 720000 yuan after the experiment, 350000 yuan per year for filter press, and 300000 yuan per year for land purchase and landfill

according to the data analysis of the sludge recycling project for more than half a year, Rongsheng paper can recover about 9000 tons of fine fibers in the whole year. The current market price of waste paper is 1500 yuan/ton, and the annual revenue is 13.5 million yuan. Due to the shutdown of the filter press and the suspension of sludge outward transportation and land purchase for landfill, 1.37 million yuan can be saved in the whole year; The interest generated from the loan of the recovery project is about 3.04 million yuan, and the annual depreciation cost is 3.8 million yuan. In this way, the annual economic benefit will increase by 8.03 million yuan

all the paper-making sludge is recycled for paper-making production, and the resources are truly recycled. The quality of paper-making products has not decreased, but various indicators have increased, and the price has also increased! The formulation scope must be controlled. Luxianggen told us that in addition, the water from the air flotation tank is reused in the make-up water and cleaning water of the paper workshop, which also reduces the water consumption of the company

it is understood that this sludge recycling project is gradually being tried out in the paper-making enterprises in our city. It is believed that before long, the paper-making enterprises can realize the full utilization of sludge

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