พฤศจิกายน 26, 2020, 04:53:38 PM
ข่าว: กลับสู่เว็บไซต์ www.nicaonline.com
หน้า: [1]   ลงล่าง
ผู้เขียน หัวข้อ: Hydroponic plate/fabric/grass system for treatment  (อ่าน 1803 ครั้ง)
0 สมาชิก และ 25 บุคคลทั่วไป กำลังดูหัวข้อนี้
mei
systems Research
YaBB God
******

Karma: 0
ออฟไลน์ ออฟไลน์

กระทู้: 596


ดูรายละเอียด
« เมื่อ: มีนาคม 29, 2010, 09:45:04 AM »

Hydroponic plate/fabric/grass system for treatment of aquacultural wastewater

Jimming Pan a,b,*, Huawei Sun b, Andre Nduwimana a, Yuanyuan Wang a,
Gendi Zhou c, Yibin Ying a, Ruihong Zhang b
a Department of Biosystems Engineering, Zhejiang University, Hangzhou 310029, China
b Department of Biological and Agricultural Engineering, University of California at Davis, Davis, CA 95616, USA
c Department of Environmental Science, Hangzhou Teaching College, Hangzhou 310019, China

Aquacultural Engineering 37 (2007) 266–273

Keywords: Aquacultural wastewater treatment; Hydroponic; Unwoven fabric; Suspended solids; Constructed wetlands

Abstract
Hydroponic plants can efficiently absorb and uptake soluble compounds in wastewater but they have low abilities to removesuspended solids due to the lack of culture media to trap solids. This paper presented an improved hydroponic method for effectivetreatment of the wastewater from the backwash of recirculating aquacultural systems. The ryegrass (Lolium perenne Lam) wascultured with improved media consisting of perforated plastic plates and several layers of unwoven cotton fabric. The plate/fabric/
grass cells with one, three, five, and seven layers of fabric were studied. After one vertical filtration pass through the cells, the removals were 48, 59, 60 and 63% for total solids (TS), 48, 58, 63 and 69% for volatile solids (VS), and 4, 7, 14 and 25% for suspended solids (SS), respectively, for different cells with one, three, five, and seven layers of fabric. It was found that increasing the number of vertical filtration passes through the cells improved the solids removal. The 1-day treatment in the recycling irrigation
and treatment system with five cells ( = 0.8 m2 grass) removed 66% TS, 71% VS, and 91% SS, and absorbed 72% total nitrogen (TN), 80% total phosphorus (TP), 63% chemical oxygen demand (COD), and 85% total ammonia nitrogen (TAN). This hydroponic plate/fabric/grass system is a simple and efficient technology for the effective eco-treatment of aquacultural wastewater with relatively high concentrations of suspended solids.
บันทึกการเข้า

หน้า: [1]   ขึ้นบน
พิมพ์
 
กระโดดไป: