TAILIEUCHUNG - Integrated Waste Management Volume II Part 9

Tham khảo tài liệu 'integrated waste management volume ii part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 272 Integrated Waste Management - Volume II Bin composting is usually conducted in a three-sided enclosure on a hard stand . concrete or compacted soil . It may or may not be covered by a roof though a roof is usually required in high rainfall areas. Designs are available on-line for purpose-built constructions with concrete floors roofs and wood or concrete side-walls Fig. 2 . In its simplest form the walls can be constructed of hay bales or any such material that can adequately confine the composting pile Mukhtar et al. 2003 . Simple bins can also be constructed from pallets or wood and plastic mesh. These are sometimes termed mini-composters and are suitable for small animals such as poultry rabbits piglets and fish Brodie Carr 1997 . Fig. 2. Diagram of a dead bird composting facility. Additional detailed drawings can be found at the USDA National Resources Conservation Service website http technical engineering . At least 3 bins are usually in operation at any one time one being filled another in the primary stages of composting and the other in the secondary stages of composting. A pile is sometimes substituted for the secondary bin in two bin systems Keener et al. 2000 . Bins are usually only used to compost small- and medium-sized carcasses. As a general guide 10 m3 of bin space is required for every 1 000 kg of carcass Mukhtar et al. 2004 . Piles for mortality composting are usually constructed in the open on a hard stand. Placing a plastic or geotextile liner under windrows as a moisture barrier is recommended when a concrete pad is not available. Access to the pile from all sides should be possible and the pile is shaped to shed rainfall. Windrows are formed by continually extending the length of the pile with the addition of further mortalities and supplemental carbon. The length of the windrow is determined by loading rates and site layout. Mukhtar et al. 2004 described the recommended dimensions of windrows

TỪ KHÓA LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.