Pulp & Paper Canada T 93 107:4 (2006) ❘ ❘ ❘ 47 ISPOSAL OF SLUDGES produced from biological wastewater treatment facilities is costly for the pulp and paper industry. A novel biodrying process has been developed that raises the dryness of pulp and paper mill sludge to a solids level where it can be economically combusted in existing boilers [1]. The process involves an aerated biopile, in which ...

Biodrying is a variation of aerobic decomposition, used within mechanical-biological treatment (MBT) plants to dry and partially stabilise residual municipal waste. Biodrying MBT plants can produce a high quality solid recovered fuel (SRF), high in biomass content. Here, process objectives, operating principles, reactor designs, parameters for process monitoring and control, and their effect on...

The condition of Municipal Solid Waste (MSW) in Malaysia, which contains excessive moisture complicate the segregation process of recycling and making the use of such technology as solid waste burning unsuitable and harmful. In addition, not much MSW pre-treatment is carried out in Malaysia to reduce the moisture content. Although Malaysia’s first waste-to-energy plant has proven to be relative...

Pathogen contamination of waterways is a serious concern in dairy farming areas where livestock waste is applied to agricultural fields. As an alternative, a biodrying composting system dries collected livestock waste, reduces the strong odors, and has been proposed as a means of reducing, and even eliminating pathogens present in the waste. Therefore, the survival of pathogens in a biodrying c...

Biodrying consists of reducing moisture by using the heat from aerobic bio-degradation. The parameters that control the process are: aeration, temperature during the process, initial moisture of biowaste, and temperature and relative humidity of the input air. Lawn mowing and garden waste from the gardens of the University Jaume I, Castellón (Spain) were used as a substrate. Biodrying was perfo...

BACKGROUND AND OBJECTIVES: Urban intensity and activities produce a large amount of biodegradable municipal solid waste. Therefore, biodrying processing was adopted to ensure the conversion into Refuse Derived Fuel and greenhouse gases. METHODS: This study was performed at a greenhouse, using six biodrying reactors made from acrylic material, and equipped...

Biodrying is an essential part of the mechanical–biological treatment process that minimizes moisture content and simultaneously maximizes heating value for refuse-derived fuel (RDF) production. Although mechanical separation operates effectively in Thailand’s RDF production, high organic levels their degradation cause contamination RDF, producing wet RDF. Aeration effective biodrying process, ...

Biodrying was studied over 46 days in two piles (P1 and P2) composed of orange peel structuring materials (mulch: P1; sugarcane bagasse: P2). The oxygen carbon dioxide levels were recorded at different depths (0.1 to 0.6 m). From the beginning 33–35 drying carried out by a combination microbial heat, convection, solar irradiance; moisture reached 30%, corresponding water activity (aw) 0.88–0.9,...

Sampah merupakan suatu material sisa yang tidak diinginkan setelah berakhirnya proses tertentu. Dimana sampah dalam proses-proses ada di alam sebenarnya konsep melainkan hanya adanya produk-produk dihasilkan dan selama tersebut berlangsung. Terdapat berbagai macam dapat diaplikasikan untuk menghasilkan RDF diantaranya dengan melalui biodrying. Biodrying itu sendiri salah satu bagian dari teknol...

This study assesses the technological, environmental and economic feasibility of biodrying to valorise cellulosic sludge as a renewable energy source. Specifically, three different aeration strategies were compared in terms performance, energetic consumption, gaseous emissions, quality end-products techno-economic analysis. These based on combinations convective drying with biogenic heat produc...