Abstract
Swags as typical agricultural lands are widely distributed in rural areas. They also act as the important water storage ponds in rural areas in Northern China. But unfortunately, a big heap of pollutants is often dumped into swags due to industrial revitalization, population growth and for other reasons, coupled with man-made sabotage and backward infrastructure, the water pollution is ubiquitous everywhere. A survey has been conducted on typical swags in a county of Hebei, China, for developing a preliminary treatment program, which provides the clues to the treatment of swags in the area. Water in these swags generally has poor quality, even falls short of Class V surface water standard. Rainwater swag holds the best quality, followed by the domestic sewage + rainwater swags, while the pollution of the aquaculture wastewater + rainwater swags are heavy, pertaining to the sewage with high organic matter and high ammonia nitrogen wastewater. For the specific projects, this is the program designed on the principle of “select a reasonable combination process based on the pollution situation of the swags and sustainable treatment effect”, and with the “decontaminate to cut off pollution – purify and treat water to control pollution – purify microbial activation water, restore water body self-purification function – intensify plants for water self-purification function – perform scientific management” as the basic idea.
