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Nargis Sultana Nipu ID: 2013000400013Moniruzamman ID: 2013000400035MD. Mofizur Rahman Sazal ID: 2013000400036MD. Mazadul IslamRipon ID: 2013000400016Batch: 22 Section: A

Southeast UniversityDepartment of Textile Engineering

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Content : Textile Sludge Sludge management How to produce sludge Characteristics of sludge Textile ETP sludge process Reuse of sludge Conclusion

What is Sludge ?

Sludge is the solid material removed during the treatment of wastewaters. The term is also sometimes used as a general term for solids separated from suspension in a liquid material usually contains significant quantities of wastewater. There are three kinds of sludge: sewage sludge from municipal treatment works, septage pumped from septic tanks, and industrial smudges. All three are a growing management problem in this state, and throughout the world. A primary treatment plant removes solids physically, by screening out larger objects and allowing grit and other materials to settle in settling tanks. This removes most solids, but leaves suspended matter and dissolved substances in the discharged water, or effluent.

What is sludge management ?

The Sludge management consist of different distinct functions such as Solid Liquid separation, Sludge Thickening, Sludge De- watering and Sludge disposal.The following Equipment's manufactured by Confident play significant role in Sludge Management Process.

High Rate Solid Content Clarifier Sludge Thickener Filter Press Hydro Extractor Decanter

How sludge is produced from Textile mill wastewater

Characterization of sludge:Physical and Chemical parameters of Textile Mill Sludge

Textile ETP Sludge PROCESS:

Collection from effluent treatment plant Sludge is dried Sieved to remove dust Mixing Proportion is 4% ,8% ,12% Then the sludge was mixed along with cement

concrete and mortar The sludge was found to have very high

concentration of pollutants like sulfate, chloride, color etc.

The Sludge Use in Landfill : Commonplace requirements in many industries are to minimize the amount

of waste generated and to reduce the overall impacts on the environment. Pulp and paper industries and automobile manufacturing unit generate a considerable amount of diverse hazardous waste. There are now standard practices or norms available for such industries. A number of methods are used for disposal of such kind of waste and reduce the concentrations of contaminants. The waste after conventional treatment results into sludge, ash or cake which contains residual contaminants mostly consisting of heavy metals / inorganic concentrates. These waste ends up in waste molds or a landfill. In India, about 4.4 million tones/ annum of Hazardous Waste, which ends up for disposal. Unless this is scientifically disposed, it could cause serious hazard to human health.

Why use a Hazardous Waste Landfill Low costs compared to other disposal options Often the only final disposal route for residues arising from other

HWM options (e.g. ashes from incineration processes) Well-designed landfills can be unobtrusive

The Sludge Use in Brick Manufacturing

Brick manufactured from incinerated sewage sludge ash and clay is investigated. The results of Atterberg limits tests of molded ash-clay mixtures indicated that both plastic index and dry shrinkage decrease with an increasing amount of ash in the mixture. Results of tests indicated that the ash proportion and firing temperature were the two key factors determining the quality of brick. Increasing the firing temperature and decreasing the amount of ash in the brick resulted in a decrease of water absorption. The appropriate percentage of ash content for producing quality bricks was in the range of 20 to 40% by weight with a 13 to 15% optimum moisture content prepared in the molded mixture and firing at 1,000°C for 6 h. With 10% ash content, the ash-clay bricks exhibited higher compressive strength than normal clay bricks. This study showed that the pulverized sludge ash could be used as brick material. The bonding strength can be further enhanced by controlling operating conditions.

A Special Way to Manage Textile Sludge: Activated Sludge Process

Process in which a mixture of wastewater and microorganisms is heated and mineral.

Leads to oxidation of dissolved organics

After oxidation, separate sludge from wastewater Induce microbial growth

Conclusion: Sludge is produced from the treatment of

wastewater. This is inherently so because a primary aim of wastewater treatment is removing solids from the wastewater.

After producing sludge the major fact is reuse of sludge. we describe 2 way of reuse of sludge. The sludge also use in agriculture regulation.

We should find more way to reuse of sludge.

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