ISSUES IN OVERALL WASTEWATER SYSTEM

ISSUES IN OVERALL WASTEWATER SYSTEM
DESIGN
Post-primary treatment of slaughterhouse wastewater
depends on the location. In Europe, most
slaughterhouses and rendering plants deliver their
wastewater to municipal systems after preliminary
primary treatment (Sayed et al., 1987). Where this is
not feasible, some plants have installed activatedsludge
plants with biological nutrient removal. In the
US, the situation is unclear, although there seems to
have been a trend towards activated-sludge plants.
In the majority of Australian slaughterhouses, wastewater
has passed through anaerobic treatment ponds
then into aerobic-pond systems. In a few, direct
aerobic treatment (i.e. activated sludge) has been
used. The goal of the former has been to achieve
BOD reduction, whereas the goal of the latter has
often also included nitrification. In contrast, New
Zealand slaughterhouses often irrigate primarytreated
or anaerobic-treated wastewater directly to
land.

ผลลัพธ์ (ลาว) 1:

ບັນ​ຫາ​ໃນ​ລະ​ບົບ WASTEWATER ລວມ
DESIGN
ໂພດ​ການ​ຮັກ​ສາ​ປະ​ຖົມ​ນ​້​ໍາ​ເສຍ​ໃນ​ໂຮງ​ຂ້າ​ສັດ
ຂຶ້ນ​ຢູ່​ກັບ​ສະ​ຖານ​ທີ່​. ໃນ​ເອີ​ຣົບ​, ທີ່
ໂຮງ​ຂ້າ​ສັດ​ແລະ rendering ພືດ​ໃຫ້​ຂອງ​ເຂົາ​ເຈົ້າ
ນ​້​ໍາ​ເສຍ​ໃນ​ລະ​ບົບ​ເທ​ສະ​ບານ​ຫຼັງ​ຈາກ​ເບື້ອງ​ຕົ້ນ
ການ​ປິ່ນ​ປົວ​ປະ​ຖົມ (Sayed et al​.​, 1987​)​. ທີ່​ນີ້​ແມ່ນ
ບໍ່​ເປັນ​ໄປ​ໄດ້​, ບາງ​ໂຮງ​ງານ​ໄດ້​ຕິດ​ຕັ້ງ activatedsludge
ພືດ​ທີ່​ມີ​ການ​ໂຍກ​ຍ້າຍ​ຂອງ​ທາດ​ອາ​ຫານ​ຊີ​ວະ​ພາບ​. ໃນ
ສະ​ຫະ​ລັດ​, ສະ​ຖາ​ນະ​ການ​ແມ່ນ​ບໍ່​ຈະ​ແຈ້ງ​, ເຖິງ​ແມ່ນ​ວ່າ​ບໍ່​ມີ​ເບິ່ງ​ຄື​ວ່າ​ຈະ
ມີ​ແນວ​ໂນ້ມ​ໄປ​ທາງ​ພືດ​ໃຊ້​, sludge ໄດ້​.
ໃນ​ສ່ວນ​ໃຫຍ່​ຂອງ​ໂຮງ​ຂ້າ​ສັດ​ອົດ​ສະ​ຕຣາ​ລີ​, ນ​້​ໍາ​ເສຍ
ໄດ້​ຜ່ານ​ການ​ນ​້​ໍາ​ການ​ປິ່ນ​ປົວ anaerobic
ຫຼັງ​ຈາກ​ນັ້ນ​ເຂົ້າ​ໄປ​ໃນ​ລະ​ບົບ aerobic ຫນອງ​. ໃນ​ບໍ່​ເທົ່າ​ໃດ​, ໂດຍ​ກົງ
ປິ່ນ​ປົວ aerobic (sludge ໃຊ້ IE​) ໄດ້​ຮັບ​ການ
ນໍາ​ໃຊ້​. ເປົ້າ​ຫມາຍ​ຂອງ​ອະ​ດີດ​ໄດ້​ມີ​ການ​ບັນ​ລຸ
ການ​ຫຼຸດ​ຜ່ອນ​ກໍາ​ມະ​ການ​, ໃນ​ຂະ​ນະ​ທີ່​ເປົ້າ​ຫມາຍ​ຂອງ​ກໍ​ໄດ້
ມັກ​ຈະ​ມີ​ການ​ລວມ​ເອົາ nitrification​. ໃນ​ທາງ​ກົງ​ກັນ​ຂ້າມ​, ນິວ
ຊີ​ແລນ​ໂຮງ​ຂ້າ​ສັດ​ມັກ​ຈະ​ຊົນ​ລະ​ປະ​ທານ primarytreated
ນ​້​ໍາ​ເສຍ​ຫຼື anaerobic ຮັບ​ການ​ປິ່ນ​ປົວ​ໂດຍ​ກົງ​ກັບ
ທີ່​ດິນ​.