BEIJING, Sept. 14 (Xinhuanet) -- Among the list of food safety scandals that have chronically plagued China in recent days the most nerve-jittery problem of late is the toxic "gutter" oil showing a really nasty reality of Chinese food today.
The list could include, just to name a few, toxic infant formula, pesticide-tainted vegetables, pork tainted with clenbuterol, fish treated with cancer-causing antimicrobials, eggs colored with industrial dye, fake liquor that can cause blindness or death, and exploding watermelons.
The uncovered swill oil has again embarrassed and let down food safety watchdog who has ramped up efforts to put things right and vowed to turn out safe food to grace people's dining table. Chinese police have detained 32 people in a nationwide crackdown on "gutter oil" or old kitchen oil that has been dredged from gutters and sold for cooking. Recycled "drainage oil" can contain carcinogens and traces of aflatoxin, a potentially deadly mold.
The Ministry of Public Security said in a statement on its website that police had seized 100 tons (90 metric tons) of the potentially harmful oil in 14 provinces. It said six workshops were closed, including one operated by Jinan Green Bio Oil Co., a business that claimed to be turning kitchen oil into fuel but that was actually churning out recycled cooking oil that it passed off as new.
EDIT
http://news.xinhuanet.com/english2010/indepth/2011-09/14/c_131138369.htm