ธันวาคม 10, 2019, 06:17:21 AM
ข่าว: กลับสู่เว็บไซต์ www.nicaonline.com
หน้า: [1]   ลงล่าง
ผู้เขียน หัวข้อ: Removal of ammonium-N from a recirculation aquacultural system using an immobili  (อ่าน 32 ครั้ง)
0 สมาชิก และ 2 บุคคลทั่วไป กำลังดูหัวข้อนี้
waitatnooklum
systems Research
Full Member
******

Karma: 0
ออฟไลน์ ออฟไลน์

กระทู้: 115


ดูรายละเอียด
« เมื่อ: ธันวาคม 04, 2019, 11:55:39 AM »

Removal of ammonium-N from a recirculation aquacultural system using an immobilized nitrifier

Sung-Koo Kim a,*, Insoo Kong a, Byung-Hun Lee b,
Limseok Kang b, Min-Gyu Lee c, Kuen Hack Suh c
a Department of Biotechnology and Bioengineering, Pukyong National Uni6ersity, Pusan 608 -737, South Korea
b Department of En6ironmental Engineering, Pukyong National Uni6ersity, Pusan 608 -737, South Korea
c Department of Chemical Engineering, Pukyong National Uni6ersity, Pusan 608 -737, South Korea
Received 20 February 1999; accepted 2 September 1999


Abstract

Various immobilization methods were evaluated for the removal of ammonium-N from recirculating aquacultural water. Ba-alginate, Ca-alginate, carrageenan, and agar beads were prepared with nitrifer consortium from the activated sludge of a sewage treatment facility in Sooyoung, Pusan, South Korea. Batch bioreactor tests for the determination of the effectiveness of the immobilized nitrifier and the optimum hydraulic retention time (HRT)
were carried out. The nitrifiers immobilized in Ba-alginate and Ca-alginate showed the most effective nitrification, while those immobilized in the carrageenan and agar beads showed reduced activities. Ninety five percent of the ammonia (20 mg:l) added to the batch bioreactor was nitrified in 6 h when immobilized Ba-alginate or Ca-alginate nitrifiers were used. In order to apply the immobilized nitrifier to an aquaculture facility, a continuous bioreactor was used with synthetic aquacultural water containing 2 mg:l ammonia. Using immobilized Ba-alginate and Ca-alginate beads, 94 and 87% of loaded ammonia were removed with in 3.4 h of HRT, respectively. The amounts of ammonia removal per day were in the range of 2.8?82 g ammonia:m3 per day depending on HRT. The highest ammonia removal rate of 82 g:m3 per day was observed when HRT was 0.3 h (18 min). ? 2000 Elsevier Science B.V. All rights reserved.

Keywords: Immobilization; Nitrification; Ammonia removal; Aerobic biofilteration

www.elsevier.nl:locate:aqua-online
* Corresponding author. Tel.: 82-51-6206188; fax: 82-51-6206180.
E-mail address: skkim@dolphin.pknu.ac.kr (S.-K. Kim)
0144-8609:00:$ - see front matter ? 2000 Elsevier Science B.V. All rights reserved.
PII: S0144-8609(99)00026-6
บันทึกการเข้า

หน้า: [1]   ขึ้นบน
พิมพ์
 
กระโดดไป: