An unpresented approach to ameliorate swine waste contamination

Abstract

Piggery waste is one the tree major water pollution sources in Taiwan. Piggery waste should be viewed as resource and not waste. Conventionally, three stage wastewater treatments are too costly and hard to operate. Direct application to soil can be a remedy if the application rate is careful managed. Generally, wastewater from the piggery industry is treated in three stages: liquid solid separation, anaerobic digestion and then aerobic treatment. However, this process is difficult due to high cost and difficult operation. Therefore, a feasible method was to establish a centralized methane production facility for the treatment of piggery industrial waste. The products after treated like methane and fertilize are utilized as clean and environmentally friendly products. Methane can be used for cooking or electricity generation. This is a new direction suitable for sustainable development. Three stage piggery waste water treatment including soil liquid separation, anaerobic digestion and then aerobic treatment which is not well received and popular due to costly and difficult operation in Taiwan. Particularly, the anaerobic component is always a headache. Taiwan EPA ambitiously launches piggery manure direct apply to soil policy. It might the panacea to water pollution control. The feasible approach is to set a centralized methane production facility to purify, electricity as well as heat generation, and gay for motor. With the major pollutants such as odors, BOD, TN and TS, waste from the piggery industry has been seriously affecting the environment in Taiwan. However, if this amount of waste is properly treated, it will bring great benefits and can be considered as a resource.