In China Industrial Competitive Intelligence Research, Wuhan city circle is a base for grain, oil and cotton, which contains Wuhan, Huangshi, Ezhou, Xiaogan, Huanggang, Xianning, Xiantao, Tianmen, Qianjiang, where agriculture is developed and arich source of biomass energy. Accord­ing to the essential characteristic of village biomass and its distribution, combining the status of biomass utilization, two important comprehensive utilization projects of two main biomass sources are put forward, which are the polygeneration scheme of cotton stalk system (Fig. 4.10 and Fig. 4.11) and the rice husk system (Fig. 4.12).

It is found that the straw enrichment area can be classified into two categories. In the first category, there are cotton stalks in the field, and other resources are classified according to the production of straw or wheat-straw. In the second category, there are no cotton stalks in the fields and they have plenty of straw. The two types of drawing the all-round systems are shown in Figure 4.10 and 4.11, respectively.

The utilization of straw in the polygeneration system is effective. Without external basic energy, subsystems are coordinated to eliminate secondary pollutants, and overcome the problem that single technology of using biomass suffers from with poor economic returns, and by generation of secondary pollution.

As is shown in Figure 4.12, the rice husk poly-generation system connect the rice processing and rice husk utilization, making full use of the energy in the rice husk, and solving pollution problem of secondary ash accumulation. This system consists of some subsystems, such as rice husk gasification power generation, rice processing, rice drying, and rice coke burning systems. The rice husk poly-generation systems decreases the cost of producing rice because it needs to consume not any external energy. At the same time, the system supplies power for its own operation, while transferring the dump power to resident’s homes. The ash can be used for steel works and white carbon black production. It shows a great potential economic value.