To reduce the communal sludge amount and to increase the energy output, HoSt使用多种技术的组合. A combination of a thermophilic digester and a mesophilic after-digester increases the conversion by 25%. Furthermore, Thermal Pressure Hydrolysis can be implemented as a pre-step. This leads to a further increased biogas production by 15%, 污泥减少, 以及改善的脱水性能.
Combination of a thermophilic and mesophilic digesters
By combining a thermophilic digester (55 °C) with a mesophilic digester (40 °C), HTH华体会全站App产率提高25%以上. Thermophilic digestion means digestion at a higher temperature compared to a conventional, 嗜中温消化过程. 更多的 heat must be used to heat the sludge, but this leads to an increased biogas production. A patented heat recovery system designed by HoSt ensures that there is a positive energy balance.
The goal of a TPH system is to improve the biodegradability of organic material. 利用热压水解, structures that are normally hard to convert by bacteria, such as lignin in plant material and cells in sludge can be converted. This breakdown step makes the organic matter more available for the bacteria. Because of TPH, this improves the material conversion rate and increases biogas production. 除了增加了HTH华体会全站App产量, the TPH process leads to a reduction of the sludge 以及改善的脱水性能, 从而减少污水处理厂的排放成本. 更多的 信息 关于热压水解.
The sludge at the WWTP contains valuable raw materials that can be recovered and re-used. One of this materials is Struvite, which can be used in the agriculture as a fertilizer for example.
The biogas from the digesters can be used to produce electricity with a CHP-system, 或者是HTH华体会全站App 升级到甲烷, and injected into the gas grid or used as transport fuel (LNG,CNG).