Zaitian Environment attended the Smart Water Innovation Technology Exchange Meeting and shared the one-way phase flow negative pressure collection system

Rural wastewater treatment equipment has its own characteristics, such as small footprint and ease of integration. It not only treats domestic wastewater but also can be used for large-scale wastewater treatment. As a core processing equipment, it is currently a good assistant for wastewater treatment, and the integrated wastewater treatment equipment is cheap and cost-effective.
The purification tank, a rural sewage treatment equipment, adopts an improved A/O + filtration technology and is equipped with an advanced intelligent control system. It features a short installation period, short commissioning time, low investment and operating costs, high treatment efficiency, and secondary pollution characteristics.
The current situation of rural sewage treatment in China starts from a low base, indicating a huge market potential. This low starting point is mainly manifested in two aspects. Firstly, the efficiency of sewage treatment is low. In recent years, the treatment rate of rural domestic sewage treatment equipment has been relatively low. Among the installed equipment, there is not much normal operation. According to relevant statistics, the normal operation of rural sewage treatment equipment constructed in China may be limited, which means that most of the processing equipment will be modified or postponed in the future.
On the one hand, the starting point is relatively low. On the other hand, national environmental protection policies, including those concerning the living environment of rural populations, are becoming increasingly stringent. The government's investment in village sewage treatment plants is increasing, indicating that domestic village sewage treatment holds tremendous market potential. Rural sewage treatment is widely recognized in the industry as the next blue ocean after the water sector.
Currently, the primary discharge standard for most urban domestic sewage treatment processes is the main B emission standard. However, in reality, even the basic B emission standard is not met by all targets. For instance, CODcr and ammonia nitrogen are easily within the standard range, whereas total nitrogen and total phosphorus often fail to meet the standard. This situation may exist in the market due to low-level sewage quality monitoring and insufficient investment in domestic towns and villages. Effluent indicators are typically only monitored for CODcr and ammonia nitrogen. Furthermore, the sewage collection network in towns and villages is generally poor. Groundwater, mountain springs, and rainwater mix into the sewage pipe network, leading to dilution of the influent concentration. Nevertheless, as domestic environmental protection requirements become increasingly stringent, and as more attention and investment are given to village sewage, this situation will become unsustainable, making it imperative to improve the level of processing technology.
Food wastewater includes sewage discharged during the processing of alcohol, beer, monosodium glutamate, starch, lactose, citric acid, vegetable processing, and various soft drinks. If the wastewater is not treated in a timely manner, it can cause significant environmental pollution.
Characteristics of sewage: The characteristics of food industry sewage include high content of organic matter and suspended solids, susceptibility to decay, generally low toxicity, seasonal variations in water quality and quantity, and a high proportion of high-concentration sewage. Its main hazards are eutrophication of water bodies, leading to the death of aquatic animals and fish, promoting the production of odors from organic matter deposited at the bottom of water bodies, deteriorating water quality, and polluting the environment.
Treatment method: The main process for this type of sewage is proposed to be air floatation anaerobic-aerobic treatment. First, the sewage enters an oil separation and regulation tank, and then is pumped into an air floatation tank to remove most insoluble impurities and oils. After that, it enters anaerobic-aerobic biological treatment. The water after biochemical treatment meets the tertiary standard and is discharged into the urban sewage pipe network.
The food industry encompasses numerous industries such as meat processing, aquatic product processing, dairy processing, canning, brewing, and sugar production. Consequently, the food industry utilizes a wide range of raw materials and produces a diverse array of products, resulting in significant variations in the volume and quality of wastewater discharged. Unlike other industrial wastewaters, food industry wastewater typically does not contain harmful substances such as heavy metals or pesticides, but its BOD and COD levels are generally higher. Since most of the raw materials used in the food industry are organic substances that can be digested by the human body, the biodegradability of food industry wastewater is generally good.