摘要:
An object is to provide an anaerobic treatment apparatus that can maintain the activity of an anaerobe at a high level while reducing the amount of alkali agent used. Provided is an anaerobic treatment apparatus that has a tank containing an anaerobe and is configured to anaerobically treat an organic matter-containing wastewater with the anaerobe in the tank, including: a pH measurement unit for measuring the pH of water in the tank; and a CO 2 concentration measurement unit for measuring the CO 2 concentration of a gas in the tank, wherein the alkalinity of the water in the tank is calculated based on a measurement value obtained by the pH measurement unit, a measurement value obtained by the CO 2 concentration measurement unit and a relationship among the alkalinity of the water in the tank, the pH of the water in the tank and the CO 2 concentration of the gas in the tank, and an alkali agent is added to the water in the tank based on the calculated value so as to keep the alkalinity of the water in the tank within a range of 1000 to 5000 mg/L.
摘要翻译:本发明的目的是提供一种厌氧处理装置,其可以在减少所使用的碱剂的量的同时将厌氧菌的活性维持在高水平。 本发明提供一种厌氧处理装置,其具有含有厌氧菌的罐,其构造为与所述罐中的所述厌氧菌对所述含有机物的废水进行厌氧处理,所述废水处理装置包括:pH测量单元,其用于测量所述罐中的水的pH值; CO 2浓度测定单元,用于测定罐内气体的CO 2浓度,其中,基于由pH测定单元得到的测定值,计算出罐内的水的碱度,由CO 2浓度测量单元以及罐中水的碱度,罐中的水的pH和罐中的气体的CO 2浓度和碱剂之间的关系加入到罐中的水中 计算值,以使罐中的水的碱度保持在1000〜5000mg / L的范围内。
摘要:
A membrane separation device and a membrane separation method, where membrane clogging is less probable to occur, membrane separation can be conducted even when water to be processed has a relatively slower flow speed, membrane filling efficiency is excellent, and foreign objects are less likely to accumulate in the device. The device has vessel-like inner casings in series in a pressure container having an inlet for water to be treated at one end and a concentration water outlet at the other end. Flow straightening plates are placed on the side of the inlet for water to be processed of the pressure container, a large number of membrane separation elements are stacked in each inner casing, and spacers that serve also as seal members are placed between adjacent membrane separation elements. A through hole is so formed as to penetrate through the membrane separation elements including the spacers from one side to the other side of the stacked membrane separation elements. Permeated-water discharge passages are formed in a length direction in each inner casing. The through hole is in communication with the permeated water discharge passages, and water to be processed that is introduced into the pressure container through the flow straightening plate permeates through the membrane separation elements and is discharged to the outside through the through hole and the permeated-water discharge passages.
摘要:
An object of the present invention is to provide a novel microorganism which has an excellent ability to solubilize a variety of organic solid matter such as biological sludge including raw sludge and excess sludge discharged from sewage treating processes at sewage treatment plants, night soil treatment plants or the like, or organic sludge discharged from production processes or wastewater treatment processes at food plants, chemical plants or the like. A novel microorganism of the present invention belongs to genus Geobacillus, which has an ability to produce a solubilizing enzyme for solubilizing organic solid matter such as organic sludge or biological sludge.
摘要:
It is an object of the present invention to provide a membrane separation apparatus and a membrane separation process that are unlikely to cause membrane fouling and plugging, capable of achieving membrane separation even with relatively low flow rate of water, have an excellent membrane packing density, and are unlikely to cause deposition of foreign components in the apparatus. In order to achieve the above object, according to the present invention, vessel-type inner casings are disposed in a pressure vessel along the longitudinal axis thereof, in which the pressure vessel has a water inlet at a first end and a concentrate outlet at a second end. A flow-regulating plate is disposed on the side of the water inlet of the pressure vessel. Stacks of membrane separation units are respectively disposed in the inner casings, and spacers are disposed between the adjacent membrane separation elements. The spacers also serve as sealing members. Each stack of the membrane separation units and the spacers together define a through-hole extending from a first side to a second side, of the stack of the membrane separation elements. The inner casings have permeate discharge passages along the longitudinal axis thereof. The permeate discharge passages are communicated with the through-hole of each stack of the membrane separation elements. Water that has been fed into the pressure vessel via the flow-regulating plate permeates through the membrane separation elements and is discharged to the outside via the through-holes and the permeate discharge passages.
摘要:
A steam temperature control device (3) for controlling a main steam temperature which is a temperature of main steam generated from a superheater (14) of a boiler including a desuperheater (13) which decreases a temperature of steam using an amount of spray water based on a water amount control value and the superheater (14) for heating steam discharged from the desuperheater (13) by an exhaust gas. The steam temperature control device (3) includes a water amount control value calculation part (311) which calculates a water amount control value based on a main steam temperature such that the main steam temperature becomes a target temperature, and transmits the water amount control value to a spray water supply valve (24). The water amount control value calculation part (311) is configured to transmit, as a lower limit value of the water amount control value, a water amount control minimum value to the spray water supply valve (24). The water amount control minimum value is calculated based on a moving average of a supply water amount to the desuperheater (13) during a fixed period or a moving average of the water amount control value during a fixed period.