Sewage treatment: SBR law and acidified hydrolysis + contact oxidation method for comparing two kinds of general sewage treatment processes using these two can meet emissions standards, these two kinds of processes have advantages and disadvantages, SBR method is relatively simple process sewage system, a relatively high degree of automation, but the management level is relatively high demand; acidification hydrolysis + contact oxidation process is relatively mature, very popular in previous years sewage in Guangdong, this process management is simple, less sludge production, but contact oxidation pond The filler to be regularly replaced, repair more trouble. Because sewage generally require a simple process, and therefore generally do not use conventional activated sludge process (except for municipal wastewater). Impact of sewage brings: Some originally present in human and animal intestinal pathogenic bacteria, such as typhoid, paratyphoid, cholera bacteria and so on through contaminated livestock manure into the water, with the water flow and spread. Some viruses sewage treatment equipment, such as hepatitis virus, adenovirus, also often found in contaminated water. Some parasites, such as amoebic dysentery, schistosomiasis, leptospirosis, etc. can also be spread through water. Toxic heavy metals and their compounds in water almost all the body by binding to play a role in certain heavy metals in the body can be converted into more toxic organic compounds. And heavy metals can not be biodegradable, biological uptake of heavy metals from the environment can biomagnification, enrichment occurs through the food chain, accumulate in the human body continues to cause chronic poisoning. Rich students (Figure) _ _ sewage treatment process sewage provided by Environmental Protection Engineering Co., Ltd. Guangzhou Fu students. Guangzhou Fu students Environmental Engineering Co., Ltd. (www.fsyhb.com) strong, credible, in Guangzhou's environmental monitoring equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the rich into the brilliant students and you work for a better future!