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Paper Mill Case Study

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2.5 Major concerns with paper mill sludge management

2.5.1 Land filling

Figure 2.3 represent the disposal problem of land filling with environment. In Paper mill sludge with high organic content in landfill is subjected to aerobic and anaerobic decay. According to Buswell and Mueller (1952), 1 ton of low-ash PMS in landfill theoretically releases into environment approximately 2.69 tons of CO2 and 0.24 ton of CH4 (Likon et al., 2009). Currently, most PMS is dried, spread or deposited onto the landfill (Mabee, 2001). The landfills can be industrial, in that are constructed and operated by the mills, or they can

be independently owned, requiringsludgedisposal. theThe mill

European Landfill Directive (1999/31/EC) and upcoming bio-waste …show more content…
The use of land spreading material adjacent to residential areas is questionable due to odour.

2.5.3 Composting

Figure 2.3 give the idea about disposal method of composting and the composting is one of stabilization techniques used for prevention of uncontrolled PMS decay. The use of compost is questionable due to the same reasons mentioned in land spreading. The C: N ratio in the sludge is up to 930:1 and it is not appropriate for plant growth (Thacker, 1985; Scott and Smith, 1995; Monte et al., 2009). Composting of PMS requires a large land area and additional costs for storage and processing.
MATERIAL AND METHOD

3.1 Material

3.1.1 Cement: The most common cement is used an ordinary Portland cement of 53 grade cement conforming to IS 12269:1987 was used. Specific gravity, consistency, setting time and compressive strength test is conducted on cement. Table 3.1 shows that the properties of ordinary Portland cement 53 and the properties are determined as per Indian …show more content…
During the last decades it has been recognized with growing wood ash waste of large volume and that is increasing year in the household, mills and factories. Wood ash is generated as a by-product of combustion in wood fired power plants, paper mills, and wood burning factories. Since wood is a potential source

Page16

D Y P C O E, Akurdi, Pune 44 Department of Civil Engineering Project stage II report on Experimental study of concrete made with hypo sludge and wood ash

of energy and environmentally being friendly material, there will be increased usage of wood in energy production in future.

3.1.6 Hypo sludge: Hypo Sludge becomes a new advance material that can be used as material to support the green technology. Hypo sludge behaves like cement because of silica and magnesium properties. This silica and magnesium improve the setting of the concrete. The hypo sludge from in and around the primary paper industrial waste and disposed as landfill. To make good quality paper limited number of times recycled paper fibers can be used which produces a large amount of solid waste. It means that the broken, low quality paper fibers are separated out to become waste

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