碩士 / 國立中央大學 / 環境工程研究所在職專班 / 106 / A printed circuit board factory using ceramsites as its filtering material in the biological treatment system is faced with problems of damaged tanks due to the physical property of the material that has reduced its COD removal rate. Sometimes the tanks were even malfunctioned due to inflow jams. This study aims to find another adequate waste material that can substitute ceramsites as filter to reduce the biological treatment tank damage rate and reuse waste in the factory to enhance its environmental
performance. After analysis, we have found raschig ring to be an appropriate substitute in its lighter weight and ability to serve as microbial carrier. This study first tested the backwash rate of raschig ring and the amount of water required to sink a unit weight of raschig ring. Second, we set up an experimental module and ran several tests according to the first outcome. Third, we compared the outflow water quality after filtered by the raschig ring and the existing ceramsites;meanwhile increasing the inflow amount in the raschig ring module to assess the
possibility of replacing ceramsites with it. The result shows that it requires only one wash to clean a raschig ring without influencing the outflow water quality. Every gram of raschig ring can be sink completely in 0.1689 g of water, which can serve as the reference for future fixure
design in factories. Under the same HRT, waste raschig ring has a 24% higher COD removal rate than ceramsites and performed better in the removal of Cu, Ni, and SS.
While adjusting HRT from 3.0 hr to 1.0 hr, raschig ring has a higher COD volume loading, which is 1.65 kg*COD per m3*day. Under the condition of HRT=1 hr,raschig ring has a higher Cu, Ni, and SS removal rate compared to that of HRT=3 hr,based on the above experimental results,it is highly feasible to judge the raschig ring biological wastewater treatment system.
| Identifer | oai:union.ndltd.org:TW/106NCU05515019 |
| Date | January 2018 |
| Creators | Chang-Tseng chieh, 張曾傑 |
| Contributors | Chu-Ching Lin, 林居慶 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 76 |
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