It just popped out of the ground!
Whereas the existing installation was to a drainage field, porosity tests highlighted a lack of porosity in the clayey soils. There was a seasonally dry ditch on site which, after discussions with the local Environment Agency Officer, became the new discharge point. BG视讯已申请了一个定制的EA许可证，但理解是安装工作可先于提交许可证.
The insurance company approved the quotation, BG视讯 applied for a Building Notice and once all legalities were sorted, we started the installation work. After three days our clients were left with a new, fully compliant system and could use all the facilities!!
Why did it fail?
一旦现存的生物圆盘被从先前的挖掘中移除，它就很明显地只被安装在一层薄薄的混凝土盖下. 同样明显的是，排水区一直在下降，排出的污水已进入水箱周围的挖坑，排空后增加了水箱的浮力. 由于水箱显示出损坏的迹象，它与业主和保险公司达成协议，不承担任何风险，并以一个新的污水处理厂取代Biodisc.
The replacement plant was a Solido Smart 8 population gravity sewage treatment plant. Solido Smart是一种技术先进的系统，可以降低运行成本, minimal excavation and a long lifespan. The Solido Smart incorporates the Sequence Batch Reactor (SBR) technology. Wastewater is treated in batches rather than being treated continuously, 从而形成了一个高效的处理厂，降低了能源消耗，延长了所有部件的寿命. Rated at 0.65kwh per day based on a family of four, meaning less than £10 per person per year in electricity consumption.