An automatic sewage regulation system and a regulating method are provided. The automatic sewage regulation system is disposed between preset sewage sources and a preset sewage treatment apparatus and includes an equalization tank and an automatic sewage regulating device. The automatic sewage regulating device includes sensing modules for sensing and transmitting water quality sensing values of sewage in the preset sewage sources to a control module which outputs regulating signals to water flow regulators, so that the water flow regulators can regulate flowing volumes of the sewage of the preset sewage sources according to the regulating signal, to keep a water quality sensing value of the sewage in the equalization tank within a preset range, thereby preventing the equalization tank from converging sewage having excessively-high or excessively-low water quality sensing value. As a result, burden of the preset sewage treatment apparatus can be reduced.

A detention pond for the passive temporary storage of detained water during a potential flooding event near a river, stream or bayou where the depth and therefore the volume of the detention pond is not set by the elevation of the normally flowing water in said river, stream or bayou adjacent detention pond but rather the drain line connects to the river, stream or bayou downstream of the detention pond where the elevation is at a lower level, allowing the detention pond to be dug deeper and therefore of proportionately greater volume.

A gravitational separator for a drainage system includes a collection cavity within which drainwater is collected. The collection cavity includes an exit; and a baffle is strategically arranged within the collection cavity for isolating a boundary region of the cavity interior from the central region thereof and for directing the flow of drainwater which moves through the boundary region along a desired flow path. In addition, an outlet control structure is disposed over the mouth of the exit and includes a sidewall having an opening through which drainwater which enters the mouth of the exit must enter so that as the drainwater enters the sidewall opening and moves into the mouth of the exit opening, the direction of flow of the drainwater is altered through at least 90 degrees.

A flood control system for remotely and automatically controlling flooding and water storage on reservoirs. The flood control system generally includes a central computer that controls the water level by controlling or communicating with flow control gates positioned near a number of culverts, wherein each flow control gate typically includes: (a) a control unit communicatively coupled to the central computer, the control unit capable of sending local condition data to the central computer via a wireless connection and further capable of receiving control commands from the central computer; (b) an input/output interface capable of receiving signals or data regarding physical conditions proximate the flow control gate, the input/output interface coupled to the control unit; and (c) a water shutoff valve controllable by the control unit and positioned to selectively allow or block the flow of water through each culvert, wherein each control unit controls each water shutoff valve.

An insulating disc can be easily installed and removed from inside a riser of a septic tank. The insulating disc is seated atop an opening of the tank lid and seals around the riser inner surface. The disc can include a core formed of R-10 extruded polystyrene sandwiched between two layers of high-density polyethylene. A flexible gasket can extend outward from the disc to seal against the inner surface of the riser. Retention tabs can also be provided to center and hold the disc in place. The disc can be divided into two semicircular halves that are hinged together. A hook, eyebolt and/or rope can be used to aid in removing the disc from the riser.

A sump system includes a catch basin and a sump pump. The catch basin is configured to receive runoff water. The catch basin defines a vertical chamber extending downward. The catch basin also defines a horizontal chamber intersecting the vertical chamber to form an intersecting region. The horizontal chamber extends outwardly in first and second horizontal directions from the vertical chamber such that the horizontal chamber forms first and second regions on first and second horizontal sides the intersecting region, respectively. The vertical chamber extends downward in a vertical direction from the horizontal chamber such that the vertical chamber forms a third region on a bottom side of the intersecting region. The sump pump is at least partially disposed within the third region.

A method and apparatus for passive self-cleaning filtration of a liquid containing suspended solids is disclosed. A filter assembly of upright cylindrical filter tubes having open, downwardly-facing ends is placed within a tank of unfiltered liquid. The filter assembly is positioned in the flow of liquid through the tank such that the unfiltered liquid must pass through the filter tubes prior to discharge from the tank. The inner walls of the filter tubes are smooth with small filtering holes. Unfiltered liquid is passes up into the filter tubes and the solids are collected in the tubes and on the smooth walls. Filtered liquid that has passed through the filter tubes is kept separated from the unfiltered liquid by a barrier that functionally prevents passage of unfiltered liquid. The filtered liquid is passed out of the tank. A filter housing protects the filtered liquid and the outside surface of the filter tubes from unfiltered liquid. The solids that have collected in the filter tubes and on the smooth inner walls of the filter fall out of the open, downwardly-facing ends of the filter tubes. The filter housing has a lower chamber below the filter assembly with a sloping floor and an opening for unfiltered liquid to enter the filter housing and accumulated solids to leave the housing. The sloping floor encourages solids that fall out of the filter tubes to move down the slope and out of the housing. The filter assembly may be raised at least partially out of the tank and cleaned by washing the solids down the inside walls of the filter tubes, onto the sloping floor, and back into the unfiltered liquid. The filter assembly may be associated with a pump which pumps filtered liquid from the tank.

A catch basin that configured to receive runoff water includes a first tube, a second tube, and a perforated cap. The first tube extends downward from an upper end to a lower end of the catch basin. The first tube has a first cross-sectional area that is defined along a first plane that extends horizontally though the first tube. The second tube extends horizontally outward from the lower end of the first tube at position that is below the upper end. The second tube is in fluid communication with the first tube and has a second cross-sectional area that is defined along a second plane that extends horizontally though the second tube, wherein the second cross-sectional area is greater than the first cross-sectional area. The perforated cap is secured to a horizontal end of the second tube.

A prefabricated former for an underground pump station comprises: a floor former; a plurality of vertical support elements; a side wall secured to and surrounding the plurality of vertical support elements, the side wall having an inner layer and an outer layer defining a cavity therebetween, and an opening at an upper end of the side wall in communication with the cavity for receiving concrete, the side wall extending both above and below the floor former for defining a space above the floor former and a space below the floor former, and an opening being provided between the cavity and the space below the floor former enabling concrete to flow through the cavity and into the space below the floor former; when set, the concrete forming a unitary wall and base.

System for drainage of surface water, the system comprises a number of tanks being connected to a main pipeline leading water to a recipient. Each tank has at least one outlet for leading water from the tank to the main pipeline, and a corresponding lid, the lid is limiting the outlet until the water is at a predetermined level in the tank. The system further comprises a check valve arranged downstream of the outlet of each tank, preventing water from entering the tank from the main pipeline, and at least one air bleeder valve and at least one siphonic drainage regulator arranged between a tank and the recipient.