主题：【原创】微藻与生物燃料 --- 和倥偬飞人兄的生物燃料之藻类革命 -- piggy

但是实际上城市生活污水中的有机物还是不少的， 我这里的西区污水处理厂就在做这个事情， 一开始也是很多人说是不可能的，但后来的事实证明是相反的结论。目前正在扩大应用规模， 根据测算去年大致可以达到产生的电力达到污水处理场本身耗电的80％（污水处理这个过程可是耗能的大户）。具体介绍如下：

At the same time, we are reducing greenhouse gas emissions (and odour) by capturing increasing quantities of biogas collected from the covered lagoons. We have constructed power-generating facilities under a partnership with AGL Ltd to produce electricity from this biogas, enabling us to meet our increased energy needs from our own green sources.

We are planning to expand power generation facilities, and by 2005/06, the plant is expected to produce about 80% of its energy needs and generate more than 60 GWh a year of green energy that would otherwise have to be imported.

We are also modifying treatment processes at the plant and will stop applying raw sewage to land. We have discontinued traditional grass filtration and will cease land filtration processes by 2005/06. This will eliminate direct emissions of methane and nitrous oxide from these traditional processes, and result in reductions in our annual greenhouse gas emissions of 170,000 tonnes (80% of our overall target) and a net financial benefit to the organisation of about $1 million a year.

http://www.melbournewater.com.au/content/publications/fact_sheets/sewerage/meeting_the_greenhouse_challenge.asp

用光合作用，关键的问题还是一个光能的转化率的问题，而利用甲烷菌产甲烷的过程，池子可以挖的很深而不影响效果，同样面积下产生的能量应该较多。