| Summary: | 碩士 === 國立高雄海洋科技大學 === 海洋環境工程研究所 === 103 === Taiwan rivers’ pollution is from the most common sources of three categories by industrial, livestock and sewage waste water. The livestock industry in Taiwan mainly for the pig industry, so Taiwan's pig industry is well developed. The swine waste water in livestock industry accounts for the vast majority of the total pollutions.
Swine waste water contains large amounts of pig manure and barn with cleaning waste generated by its waste water containing suspended solids, organic matter, nitrogen, phosphorus and other pollutants, it is a high concentration of organic wastewater. When these large quantities of pollutants of wastewater directly into rivers and other water bodies without treatment, it will have a direct impact on aquatic life, destroying the environment and lead to water eutrophication stench and also affect water quality, that will increase the water treatment costs .
This study is the use of professor Shern Jian Chuan in National Kaohsiung Marine University to develop a "handle ecological wastewater treatment technology of purification" swine wastewater treatment. The test site is located in Jiuru township in Pingtung County near the upstream of wan-lian river which discharged to rivers in the waste water shutoff incorporated for wetland study. In purificated plants aspect, we selected general wetland sewage treatment plants are usually chosen the (Ludwigia peploides subsp. stipulacea), it is short of the growth cycle of economic species plants (Nymphaea tetragona), long economic growth cycle plants (Colocasia esculenta, Eleocharis dulcis, Zizania latifolia, Nymphaea tetragona), flowering plants (Canna indica, Hedychium coronarium) to assess the ability of each plant species removal efficiency of pollution.
The study field is 35m length, 49.5m width, respectively area rectangular test area consisting of 1114m2, a total of 3898m2, some blocks erected holes, the thickness of 40 cm of soil and water time 24 hr / day ,12 hr / day which inflow at setting to 5 pipes of 2-inch diameter with value to control water inflow and allocation inflow channels of each plant - growing area belong to parallel, and each region are taken independent water supply, drainage of sewage disposal mode.
Through one year and three months, experimental results show that the average BOD removal of various plant species was 60%, COD removal rates average 34%, SS average removal rate of 79%, TP average removal rate of 30% TN removal of 36% on average. The results show that the removal efficiency of the overall water quality of aquatic plants performance is Nymphaea tetragona economy, followed by the Canna indica. In addition, the treatment effect were not larged different between ventilation holes and these holes causes an increase in planting bed leveling and planting harvest difficulty, and the future of the system is not need to set up ventilation holes. There are two oyster shell gravel ponds for water purification had elevated the effect, and its COD removal increase 17% and its TN increase 25%, but it requires regular cleaning sludge pool to improve processing efficiency. The flow of the DO average 4.37 mg / L, the overall average DO upgrade 2.46 mg / L; BOD per removal rate square meter per day in this field can be removed 3.55 grams daily, COD can be removed 6.01 g, SS can remove 11.8 g , TP may be removed 0.160 g, TN removable 1.70 g, it can be seen from the above results, the present system, the average daily BOD of the water can be removed more than 3 grams per square meter per day or more, SS average daily per square meter can removable 11 grams or more, the effect of treatment better than other wetland purification system.
All the plants harvested and after heavy metals testing, there are in compliance with our regulatory standards, thus planting the next harvest can ponder the direction toward full advantage . In addition to be harvested for animal consumption, and in the future is also edible for human to consumption, it income will be used for management and maintenance of this wetland to save the government money. Furthermore, this wetland can enhance the overall look of the landscape. Maybe in the future can be used as field of ecological education, it can be expected to become the future establishment of the wetland system and the sustainable management of the construction standard method and field.
|
|---|
